The Concept of Hydrogen Fuel One Day Replacing Crude Oil as the Worlds Essay

The Concept of Hydrogen Fuel One Day Replacing Crude Oil as the Worlds Primary Energy Source - Essay Example Peak oil and the reliance of Western economies on crude oil imports for the operation of the economy points to the world reaching a critical point where demand for petroleum products outstrip supply and prices surge, raising the costs of transportation and delivery in society. Because of this economic threat caused by the nature of global petroleum reserves, society needs to plan ahead and develop new energy sources that are â€Å"Green† and sustainable. In reviewing options such as solar power, geothermal energy, and wind-generated electricity, the best option for the future may be Hydrogen power, as Hydrogen is a clean-burning, widely available fuel that can be used to fuel the automobile culture and other energy needs of society as civilization enters a new era in the future. There are many reasons why Hydrogen can be considered an ideal replacement fuel for petroleum in the future. First, the automobile pollution created by millions of cars around the world is one of the l argest contributors to global warming through carbon emissions, as well as introducing other harmful pollutants into the atmosphere. Secondly, the automobile-based economy uses petroleum products as fuel, even though these resources are unequally distributed geographically around the globe and not every nation produces enough oil from nature reserves to meet supply. Third, there is a â€Å"Peak Oil† theory that suggests the total quantity of oil reserves internationally is finite and limited, and that production at current oil fields is declining. (Bardi, 2009) These factors predict higher gas and oil prices with subsequent effects on the global economy, as well as environmental destruction.   

Satire in Candide Term Paper Example | Topics and Well Written Essays - 3000 words

Satire in Candide - Term Paper Example After revealing that the profound distrust of Voltaire of rationalist theology and metaphysics gave him an image of being inescapably ‘anti-Leibnitzien’, it reveals that, oddly, Voltaire, just like Leibniz, was committed to enlightened, open-minded, and liberal political rule which could mitigate suffering and poverty, create educational and scientific traditions, scorn religious discrimination and fallacy, and choose happiness and fortune over violence and war (Levine, 1999, 249-250). This paper explains how Voltaire satirizes the philosophy of optimism as well as other institutions of the day in his work ‘Candide’. Satire is defined as a literary device whose goal is to improve society and the human condition by poking fun at individuals and various institutions with the goal of bringing awareness and reform. Satire can be grouped into three categories, Horatian (mild, good natured, tolerant and sympathetic), Juvenalian (vituperative, biting and filled with moral indignation), and Menippean (attacks on mental attitudes instead of specific individuals). Candide contains both Horatian and Jeuvenalian elements of satire. There are various types of satirical devices among them being, hyperbole, irony, allusion, parody, oxymoron, and understatement. New ideas, fresh interpretations, and original thought characterized the period known as the Enlightenment in the eighteenth Century. Scientific discovery was flourishing which brought new discoveries that challenged the traditional power of religion. Influential writers and philosophers of this age, Voltaire being prominent among them, sought to better the human condition and advance human thinking through truth and humorous criticism. Voltaire employs scathing satire to ridicule the ideologies of the Old Regime by criticizing most of the political, social, and religious ideals of his time. More specifically however, Voltaire chose as

Political risk and living conditions in argentina Essay

Political risk and living conditions in argentina - Essay Example After the Spanish abandoned Argentina in the 19th century, it has been hard for any particular Argentine government to maintain stability. Since the Second World War many military regimes have risen and fallen in Argentina, something that leads to drastically changing positions towards business depending on who is in power. In the past ten years, however, the political situation in Argentina has stabilized significantly (NY Times Topic: Argentina). The same political party has maintained government for several years, and the presidency only changed when the former president stepped aside for his wife to run, and she won that election (NY Times Topic: Cristina Fernà ¡ndez de Kirchner). The government is also relatively pro-business. Argentina had a significant economic crisis around the year 2000 (NY Times Topic: Argentina), but since, however, has maintained one of the fastest growth rates of any Latin American country. SO long as the business is run profitably, and willing to pay taxes, then the business should be successful in Argentina. The living conditions of people in Argentina are relatively high. It has one of the best median incomes among Latin American countries, beaten only by Brazil, and, again, has shown to have one of the most robust economies (CIA World Factbook). The clothing is a mix between Latin clothing and other Western clothing, with very little traditional garb worn by the general population, especially in urban areas and along the coast. Diet and nutrition in Argentina is heavily focused on traditional foods and locally grown produce. Argentina has a massive agricultural industry, which is especially well known for producing some of the best Malbac wine in the world (Mendoza Wines). Likewise, a paucity of local pests and favorable growing conditions means that much of this can be grown without heavy use of pesticides. All of this is obviously very favorable to the

Sociology Assignments ( Just Paraphrase ) Essay

Sociology Assignments ( Just Paraphrase ) - Essay Example Thus, it is unethical to force people to act against their will if they do not want to be part of the study. I will advise him to seek consent from the fraternity members. Failure to do so will compromise the quality of the study since there is no one who should be forced to participate in a study or secretly recorded since this should be voluntary. If you are asked to electrocute a stranger by Hitler, would you do it? Morally, it is not good to do something evil or harmful to another person fully knowing so I will refuse and would rather let him execute his evil intention alone. Scenario – Milgram’s critics are accusing him of exposing both innocent and naiive subjects under unfavorable emotional strain and pressure in his quest to gain knowledge through uncouth means. However, he justifies his actions by highlighting the difference between his naà ¯ve subjects and the man in the electronic chair. He argues that the naà ¯ve subject is free to leave unlike the man in the electric chair who is helpless therefore cannot move. The argument by his critics is more convincing since good research should not expose the research subjects to harm or emotional stress. The naà ¯ve subject is unsophisticated therefore cannot be used as a reliable source of data in a research. He was supposed to inform his subjects about his intended experiment and then reach a consensus. A good researcher does not use unethical means to gather data or to manipulate the data to suit his hypothesis. A good researcher always avoids bias. A good research on the other hand is not biased and it follows proper procedures where no one is harmed. A research can be defined as a carefully designed study that uses scientific methods to collect data in a bid to get answers from a particular area that is being investigated. The findings from the data collected are usually based on theory as well as the hypothesis of the study. There are

Work in partnership Essay Example for Free

Work in partnership Essay Working in partnership with other colleagues and professionals is detrimental in being able to provide a service fit for need as it helps promote team working which i believe motivates a team to work well and excel them. It also helps every person involved in providing the service aware of all obstacles that could arise and any outcomes to achieve or have been achieved. Within a children’s setting it can also help build positive environments for children to be in and this would help a child or young person settle better into a new environment so that you are able to assess a person or child and manage tasks efficiently. It helps creates a safe environment to share information as nearly all professionals update themselves with technology, information can now be sent password protected via a encrypted system which deters others from being able to access a person’s private information by a secure connection. Sharing information about a person can help the smooth running of a service as it enables all involved to be fully aware of each person’s position and remit and allows others to know who to approach for feedback or guidance. Working in partnership with others i.e. family members or carers helps with the smooth running of a service, as family members hold a lot of information past and present about a person which can be used to build a care plan. Family are often keen to assist with service provision for a person and by working in partnership with them it creates positives relationships. You can put a person’s mind at ease with regard to the level of support a person may need. If it is a child or young person a parent or guardian would need much reassurance to know that they are leaving the child in safe capable hands therefore it is imperative that pre assessments are carried out. We have in the past used an informal interview process for new services for a person  who may have either complex or long term needs i.e. a waking night service. We would before the service is due to start we would set up an informal meeting at the clients home and arrange for 3-4 people to go and meet the client their family or NOK. This would allow them to put any questions forward and explain specific tasks and how they should be carried out. It also helps as when the service does start the person coming to assist is not a stranger. This in turn helps a nok, guardian, parent or family member enjoy their respite without fear of the person not being able to manage. This has worked well on many occasions and this is something we intend to keep as a way of matching the correct care support assistant to the person who needs support. Analyse how partnership working delivers better outcomes. Partnership working can help to deliver better outcomes for all health and social care professionals from a commissioning, performance management, service delivery and service improvement purpose. As we move forward with new legislation and processes it is important to deliver person centred care. This means we need range of expertise, knowledge and experience in order to deliver the best possible service for an individual. From the outset we are able to use the information gathered from social worker assessment, hospital discharge letters care plans and risk assessment to produce a plan tailored for a specific person. For example we currently have client who requires support from a team of Care Support Assistants, District Nurse Teams and mental health community team. By working in partnership we are able to get up to date information and guidance on the person’s condition and how to manage it from a professional point of view. We work well with arranging our service delivery around the schedule for the District Nurse’s therefore we book out daily visits either before or after their due to attend for two reasons. We found that when we attended for a review meeting and there were too many people in the property this caused panic and distress to the service user it was agreed by all that any visits would be made by appointment only and by 2 people maximum, also due to the high demand and limited resources District Nurse teams have, it worked well by planning our visits to a different time to their arrival so that they  were not kept longer than they needed to be and vice versa for our staff. There is a joint log book left in the property for any concerns or follow up actions to be taken and this is signed once the action has been acknowledged or completed. We worked with the service user to make this plan to minimise disruption and undue distress to him as by not following this plan could lead to a setback in his recovery which in turn would mean outcomes would not be met. Therefore in this instance and for most it shows that partnership working is how we proceed to working to ensure that out comes are met efficiently and if this cannot be achieved how we change our methods to enable achieved outcomes. Explain how to overcome barriers to partnership working. There can be many barriers to partnership working and most commonly arise due to a lack of experience, lack of time and a disregard for importance. Others include a lack of trust especially when it comes to children. There are many parents who initially will put a barrier up to professionals as they tend to feel that strangers are coming in to their home to tell them how to be a parent or how to look after their child. A good way of overcoming this barrier is to build a relationship with the family first, listen to the incidents, issues or concerns they have. By supporting them through the crisis/difficult time will build trust within the circle and helps them to make informed choices in a relaxed environment. Acknowledging each other’s expertise for example a parent will feel they know their child better than any other person which is correct however a professional will have seen a child similar to the one they have been allocated to many times therefore with their joint expe rtise this would make a great team. It is important to sure that you are there to support the family unit not to criticise them and this can lead to positives outcomes and overcome barriers in partnership working. For adults it can be easier to break through these barriers especially if it is to support a person who has capacity. By speaking to them to conduct assessments you get to build a good idea of a person’s character, need and attitude toward a service. It allows you to build a rapport with someone share stories and common interests if any. This can be relationship building. I recently had this experience with a service. I was  contacted privately by a husband and wife who have physical disabilities, they are wheelchair and housebound without assistance. Upon speaking to Mrs x it was clear she had some bad experiences with other providers. I decided to visit them in their home to get a broader picture of the service they wanted and problems they had in the past to try and work out how improve their opinions of care providers. Upon speaking to them it was clear that although they both have medical conditions that reduce their ability to be fully independent they were not totally incapacitated. They wanted to be treated as adults not children or elderly people who were not able to fend for thems elves. They had social needs just the same as those who are fully independent for example going to the cinema and shopping. Mr x is a keen football fan and liked talking about sports. I believed i had gained some thrust and set about finding the ideal person to provide their service. We have had the service for approximately 1 year and in that time we have had to make changes to care workers who did not work out but the current Care Support Assistant has been with since February 2014 and all communication with Mr and mrs is positive. It is in agreement that planned absences require a second and third person to cover their service and shadowing the regular Care Support Assistant always takes place. By working together closely for those 3 months and investing my time in to rebuilding their opinion I feel I have worked in partnership with them and succeeded in overcoming the initial barriers that were there. Explain own role and responsibilities in working with colleagues. My role as the Service Team Leader/ Registered Manager firstly has a legal responsibility to ensure that everyone who is in receipt of a service is kept safe from risk, harm and abuse. It is my job to ensure that all staff are fully equipped with knowledge and training to go into the field and demonstrate that they are able and suitable for the role they have been appointed to. It is my role to supervise the office staff to give guidance and support where necessary. Set tasks on week by week basis according to the needs of the business. I take the lead on any complaint or safeguarding referral we may receive and investigate. I am responsible for the petty cash kept on site and to provide our accounts team each month of the breakdown of  money spent. It is my duty to complete supervisions and appraisals for office and field staff, maintain a good working relationship with local authorities. Providing my seniors with a monthly KPI report. Keep a professional boundary with all staff a nd service users. These are an example of what is expected of me in my role however i am also available and required to support in other roles as necessary i.e. provide an out of hours service on a rota basis, provide all induction training for new applicants as well as refresher training for existing members of staff. Evaluate own working relationship with colleagues. To evaluate my own work i need to be able to request positive or negative criticism as to how i may have handled a situation so that i can learn from the experience and improve for next time. I need to be able to self evaluate and not just rely solely on another persons opinion. By doing a self analysis i am able to pick up what my strengths and weaknesses are to be improved. This can also help with the quality of my work and setting myself targets to achieve to feel a great sense of completion helps motivate me which in turn passes on a positive working environment on to my team to help all of us excel. I feel presently as i am very open and honest with all my staff and my approachable manor i feel that i am able to communicate well my expectations of how i believe the service should be run and this is passed on to field staff and rarely do i feel i need to display any negative comments on to the team. We communicate by text and email with our field staff and i often send out messag es of gratitude to those have worked well over weekends as there are many issues that could prevent a service running smoothly. I feel that by appreciating my staff at any level i have formed good working relationships however there is always a need for improvement. Explain own role and responsibility in working with other professionals. It is my role to build relationships with outside organisations such as local authorities, district nurse teams, hospital teams and social work teams. I take the lead with all safeguarding investigations and work with the professionals involved in resolving the issues raised. Although it is my  duty to take the lead i expect my office to be able to share the responsibility to an extent for example if i am away from the office for any reason i.e. annual leave or sickness, i expect the rest of the team to be able to conduct an initial investigation to gather facts and provide a summary of the incident or concern raised so that i can take over on return. I feel that this does not limit the office to one way of working or delay important tasks. It can also help promote personal development to enable a junior member of staff to gain experience in order to progress either within or outside of our organisation. It is my role to attend all contract meetings to discuss possible issues withi n our service or for feedback to passed back to our staff to give thanks appreciation for something we did well. Evaluate procedures for working with professionals. The procedure for working with other professionals remains the same across the board. Every person is expected to treat all they come into contact with, with respect, be responsive to any equality and diversity matters as discussed. Confidentiality is to be adhered to at all times and personal information is not being discussed with those outside of the professional circle. Information relating to a person or child should be shared on a need to know basis and as agreed. Each professional is responsible for their own department and are expected to deal with matters as they arise within agreed timescales. Professionals are expected to work together to obtain the best possible outcomes in the safest way. Each person has a duty of care to protect those they care for from being subjected to any form of harm or abuse and to report any concerns to a senior person or to a care management team within a local authority. Professional opinions should be sought from specialist teams before partaking in any task that could potentially cause concern. For example the procedure for reporting any concern or information regarding one of our clients from the local authority is to write a detailed email containing all the facts we have at hand. We then send this to the placements and brokerage email who are regarded as our contact team within this borough. This is sent via a secure website with password protection. They will then forward on to the relevant social work team in oreder for  this to be either recorded or dealt with. We then if need be wait for a response and a resolution to the query and work together to reach an outcome. Analyse the importance of working in partnership with others. It is extremely important to work in partnership with others as every person wants the best level and quality of care for the person they are dealing with, acting on behalf of or have a personal relationship i.e. parent, child, guardian NOK. I feel the best outcome sought by all is the wellbeing, safety and happiness of the person or child who requires support. There is also a level of consistency for not only you but for the person or child you are supporting. Children need consistency especially if you are supporting a child who has autism. Children who live with this condition require a huge amount of support. They do not adapt well to change and require routine to help them have a good quality of life and experience. By not working in partnership with others it would not be possible to build and establish relationships, improve service delivery and help the child transition well to an adult. For an elderly person working in partnership helps them have a better quality of life by having a unit of support who know their needs and are familiar to them. By working in partnership it allows every person you support to access to different activities and support. It is also good to surround yourself and your settings with professionals from all backgrounds and groups and to create relationships so you can use, learn and share resources and experience to achieve outcomes. Evaluate procedures for working with others. The procedure for working with others is very much similar to those as working with professionals. The main requirement is be honest, communicative and detailed in every aspect. It is important to seek consent and permission from the person or a child guardian, parent or NOK you are supporting before any tasks procedure or assessment takes place. It is important that you involve others in the care planning process in order to achieve the outcomes as they know themselves or their loved one best to know their strengths, weaknesses and desires to a service delivery. You are expected to treat  others with respect and dignity. As part of our pre-employment paperwork all staff office and field base are expected to sign and adhered to the dignity promise. Continued regular monitoring and supervision ensures that others are adhering and receiving all aspects of the dignity promise. That any concern raised will be dealt with efficiently and professionally. It is more common for others to be come upset and angry and may fall from treating people with respect. However this does not absolve a professional from completing their task, but it does mean that an increased sense of awareness needs to be adopted so that all can remain safe. We previously had a service user that all we was required to do was support him in taking his medication. Unfortunately his wife suffered with Dementia and she would often try and attack staff and make accusation that they were trying make her husband ill. After working with family the service user himself and other professionals it was decided that this call would be attended by two care workers. Although it did not require 2 care workers to support him to take the medication, the second care worker was sent in to distract his wife so that the first care worker could safely support him. This was due to all involved wanting the outcome to be safe. Mr x was less anxious about the distress it caused upsetting his wife and being concerned for his own health if he did not receive his medication. We continued to mon itor this new approach and all feedback was positive.

Psychology Of Adjustment Essay Example for Free

Psychology Of Adjustment Essay When a person hears the term psychotherapy, images of a white padded room and a person wearing a straightjacket immediately enter the mind. Psychotherapy was at one time in the history of mental health, taken to mean that a person has lost control of his mental faculties and now requires severe medical treatments such as shock therapy, Indeed, there was a time when psychotherapy was not something that a person would willingly undertake. These days though, the medical field of mental health that covers psychotherapy has come to be recognized as something that helps anybody, not just a mentally unbalanced person, deal with life. In effect, it has become a field synonymous with helping a person learn how to cope with his life and the problems besieging him.   Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚   In real life, basic psychotherapy is what we seek when we have problems and we turn to our friends and family for advice. The need to unload and seek the help of another person in analyzing situations is the way we cope with problems. By seeing things from another persons perspective, we gain a better handle on the situation and its relating situations or topics. Although, there are instances when problems become so severe that family or friendly intervention can no longer help the person cope. In such instances, it is important for a person to seek professional help either on his own volition or through intervention techniques.   Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚   It is not hard to find the necessary psychological help once a person has acknowledged his need for professional intervention. There are psychologists in both private and public practice who are available to help. They can be found in community centers, hospitals, and sometimes, even among the religious.   Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚   Since the psychology practitioners range from psychiatrists, psychologists, psychiatric social workers, counselors, and paraprofessionals, it is of the utmost importance that a person seeking psychiatric help know which type of mental health professional would be the best choice to approach in order to help him deal with his problem.   Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚   It is important to have a list of requirements when choosing a psychotherapist. Part of the criteria when choosing should include ( a ) insuring that the medical professional you choose is properly qualified and licensed to practice in the state, ( b ) and how that person makes you feel when you are talking to him. Comfortability and trust in the psychotherapist is of the utmost importance because this is a person whom you shall be entrusting your deepest and most private thoughts to. He or she will need to display a genuine concern for your welfare and actually listen to you in order to give you proper advise or analysis of your problems. This persons professional characteristics, professional experience, and skills can spell the difference between his ability to help and a continuing downward spiral into darkness.   Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚   Remember, a person seeks psychotherapy in an effort to understand what he is going through and why. The help given by the psychotherapist can range from emotional support, medication, and sometimes, a lifestyle change. The important thing is for the person concerned to be he involved in his own welfare and recognize and accept that he has problems that require professional help in order to for him to properly deal with it.   Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚   There is no real set time for the completion of a psychiatric treatment. Usually though, therapy can be ended once the person has gained control of the situation or problem and no longer poses a danger to himself and to others. Provided the person already knows and understands why he is going through certain difficulties in life, and he is capable of controlling the situation on his own, it will be safe to either end the treatment or continue it on an intermittent basis. It all really depends upon the patient and his needs.

Review of Binding Updates Security in MIPv6

Review of Binding Updates Security in MIPv6 Avishek Dutta   Vikram Raju R. Abstract— Mobile Nodes (MN) in Mobile IPv6 (MIPv6) are given the opportunity to eliminate triangle routing that is inefficient with their own corresponding node (CN) using Route Optimization (RO). This greatly improves the performance of the network. Unfortunately, using this method allows several security vulnerabilities to manifest itself with the MIPv6. Among those, common issues are those concerns the verification of authenticity and authorization of Binding Updates during the process of RO. These types of unauthenticated and unauthorized BUs are the key to various types of malicious attacks. Since it is expected that MIPv6 will be supported by IPv6, several mechanism to ensure BU security will be crucial in the next generation Internet. This article focuses on Mobile IPv6 and security considerations. Keywords/Index Term—IKE, Mobile IPv6, Network Security, Potential threats in MIPv6 I. Introduction The way MIPv6 operates can be seen in Figure 1 [1], with 3 node types, namely the Home Agent (HA), Mobile Node (MN) and the Corresponding Node (CN) [2], while MN’s mobility is detected by a router advertisement message including an MN able to make a router send its advertisement message by request, if needed. Following mobility detection, the MN gets a CoA unlike in MIPv4, after which it sends the BU message to the HA and the communicated corresponding node (a node wishing to connect to, or is communicating with MN). The HA and corresponding node update the binding list and send acknowledgement messages [1], meaning that the Mobile IPv6 allows an MN to alter its attachment point to the internet while maintaining established communications [3]. This paper presents an analysis of both Route Optimisation (RO) and Identity Based Encryption (IBE) protocol with proposal to strengthen the level of security of a BU method. This method uses the public key to create an authentication th at is stronger. II. MN-HA Authentication Mutual authentication between an MN and its HA is mandatory in MIPv6, and usually performed with IPSec and IKE, while session key generation and authentication are done with IKE. Using X.509 certificates in IKE is the existing method of performing these tasks. The MN moves to a foreign network and obtains a new CoA. MN carries out a BU on its HA (where the new CoA is registered). HA sends a binding acknowledgement to MN. A Correspondent Node (CN) tries to contact MN, with HA intercepting packets destined to MN. Next, HA tunnels all packets from CN to MN using MNs CoA. When MN replies to the CN, it may use its current CoA (and bind to the CN) and communicate with the CN directly (â€Å"route optimization†), or it could tunnel all its packets through the HA. Sometimes MN and HA share a common secret, possibly occurring in WLAN instances when MN shifts to another WLAN which requires authentication [4]. If there are no shared secrets, extending the IKEv2 authentication process to identity-based authentication as opposed to X.509-based authentication certificates is usual. It can also be assumed that both MN and HA use the same PKG, and according to the relationship between these three entities, any trust level from I to III may be applied during private key delivery. Regarding IKE, two main methods of implementing IBE exist, the first of which involves modifying IKE’s four-way handshake while the second utilizes EAP to generate a new IBE-based EAP authentication method [4]. A. Modifying IKE IKE could implement IBE through the addition of a third authentication method, other than the previous shared secret and X.509 authentication. Instead of X.509 certificates, IKE also uses â€Å"IBE certificates†. IBE-based authentication functions fundamentally the same as X.509 authentication, in that to authenticate peers the same information block should be signed as in the X.509-based authentication, in addition to a signature based on IBE (i.e. the Hess signature). Currently, identities are replacing certificates and revocation lists do not need to be checked. Ehmke (2007) implemented a prototype which can realize this idea. Performance wise, clearly transmit certificates or certificate requests are no longer necessary since the IKE identity can be used straight as the public key for authentication. Also, expensive certificate-chain checking is redundant while elliptic curve cryptography-based hardware- accelerated IBE algorithms are sometimes quite efficient, particularl y in embedded devices [4]. B. Extensible Authentication Protocol Several wireless networks utilize the Extensible Authentication Protocol (EAP) [5] for access authentication. EAP techniques commonly deal with AAA servers which affect the required authentications, after which notifications are relayed back to a functional module (Network Access Server) in the access network. For Mobile IPv6 [6], the Binding Authentication Data option [7] helps enable different authentication techniques, while a subtype exists for AAA- based authentication like EAP. On the other hand, there still are EAP methods requiring extra handling and specifications which present Binding Authentication Data option documentation does not provide. Currently, specification from this document is for at least some very widely deployed EAP methods, so, often, when EAP is needed, Mobile IPv6 tunnel redirection to a wireless device’s new CoA can be done much faster [8-10]. C. Using Extensible Authentication Protocol Figure 2 illustrates possible steps in EAP implementation. It is advisable to use EAP as part when establishing a concurrent shared key to be used in the final two message exchanges leading to authentication [4]. Chen and Kudla’s key agreement with IBE technique is one alternative protocol (protocol 2’ in [11]) that can function in the absence of a key escrow, so CERTREQ and CERT messages in steps 2, 3, 4 are not necessary (Figure. 2). Figure 3 illustrates the resulting IKE Initial Message exchange. 1. I _ R: HDR, SAi1, KEi, Ni 2. R _ I: HDR, SAr1, KEr, Nr, [CERTREQ] 3. I _ R: HDR, ESK{IDi,[CERTREQ,][IDr,]SAi2,TSi,TSr} 4. R _ I: HDR, ESK{IDr,[CERT,]AUTH,EAP} 5. I _ R: HDR, ESK{EAP} 6. R _ I: HDR, ESK{EAP} .. n. R _ I: HDR, ESK{EAP(success)} n+1. I _ R: HDR, ESK{AUTH} n+2. R _ I: HDR, ESK{AUTH,SAr2,TSi,TSr} Fig 2. IKE Initial Message Exchange: Authentication using EAP [12]. Here, the same PKG is shared by MN and HA, where P is a public PKG parameter, and HA and MN choose the random numbers a and b, respectively. The Chen-Kudla protocol produces a session key solely for message 7 and 8 authentication. The AUTH payloads have to authenticate messages 3 and 4 based on MAC and a secret key generated by an EAP protocol [11]. 1. MN _ HA: HDR, SAMN1, KEMN, NMN 2. HA _ MN: HDR, SAHA1, KEHA, NHA 3. MN _ HA: HDR, ESK{IDMN,[IDHA,]SAMN2,TSMN,TSHA} 4. HA _ MN: HDR, ESK{IDHA,AUTH,EAP_CK_Req(a ·P,a ·QHA)} 5. MN _ HA: HDR, ESK{EAP_CK_Res(b ·P,b ·QMN)} 6. HA _ MN: HDR, ESK{EAP(success)} 7. MN _ HA: HDR, ESK{AUTH} 8. HA _ MN: HDR, ESK{AUTH,SAHA2,TSMN,TSHA} Fig 3. IKE Initial Message Exchange: EAP with IBE Authentication [12]. But since IBE uses PKG, it is almost impossible to guess which MN will be communicated by the CN. We cannot simply assume the same PKG is used by both MN and CN. Multi-PKG is used instead but it is not recommended for larger networks. III. MN-CN Authentication Via the MIPv6 protocol, MN can keep its network connection even when the network attachment modifies [13]. An MN can be reached at its home address (HA) anytime, even when not physically in its home network. When an MN is connected to a foreign network it obtains a CoA from the local router through stateless or stateful autoconfiguration. Next, for home r egistra tion, the MN sends HA its current location information (CoA) in a BU message, then HA can redirect and tunnel packets intended. for the MN’s home address, to the MN’s CoA. When a foreign network MN is in contact with a CN (a stationary or mobile peer communicating with a MN) through the HA, bidirectional tunnelling takes place for instances when CN is not bound to the MN (registration is in progress) or MIPv6 is not supported by CN [4]. If the CN supports MIPv6, a more effective mobile routing technique, Route Optimization (RO), can be used. RO is effective as it provides the most direct, shortest path of transmitting messages between an MN and a CN, eliminating the need for packets to pass through the HA, and avoiding triangular routing (bidirectional tunnelling). Prior to setting up RO, the MN must send CN a BU packet containing its CoA with present location data. On the other hand, security risks with RO [14] can be for example that an MN may send CN a false BU packet and redirect the communication stream to a desired location, resulting in a Denial-of-Service (DoS) attack. Thus, for increased security, it is important to authenticate BUs in RO [4] [15]. What happens between a CN and MN is not the same as between an MN and its HA. Since CN could be any node, MN and CN have no shared secrets or trusted certificates. Thus, Return Routability (RR) can be used, as: †¢ An MN sends CN a home test init (HoTi) and care-of test init (CoTi). HoTi is sent directly through the HA and CoTi. HoTi has the home address and CoTi has the CoA as source addresses, both including a cookie. †¢ Upon receiving either HoTi or CoTi message, CN immediately answers with a home test (HoT) and care- of test (CoT) message which gets sent to the respective source address. Each reply contains the cookie recovered from the nonce indenx, corresponding init message, and a keygen token, later for BU authentication use. When MN receives HoT and CoT, RR is done. Only MN can receive packets sent to both its HA and CoA, and can now hash the two tokens to calculate the binding key. This key is utilized for generating a Message Authentication Code (MAC) for BUs, and MAC can be verified by CN. RR provides an analysis of a nodes reach-ability during authentication but do not validate address ownership in IPv6. IV. MIPv6 Security Analysis Providing security against different types of malicious attacks e.g. denial of service (DoS), connection hijacking, man- in-the-middle and impersonation, are the basic objectives for the development of IPv6. The objective of improved security is to create routing changes that are safe against all threats. Threats are based on the routing changes that provides mobility in the network. Threats faced by Mobile IPv6 security can be divided into different categories: __ Binding update (BU) to HA type threats __ Route Optimisation to CN type threats __ Threats that attack the tunnelling process between HA and MN __ Threats that uses Mobile IPv6 routing header to return traffic of other nodes Binding update and route optimisation threats are related to authentication of binding messages. Communication between MN and HA needs trust and communication authentication. This is because MN agrees to implement the HA services therefore relationship between the two must first be secure. However, the CN and MN does not have prior relationship but authenticating messages between the two is still possible. For example, this is possible by authenticating the public key. If a malicious packet is sent to the HA using the same source address as the MN, the HA will then forward the packet containing the MNs source address contained in the malicious node. However, this DoS attack can be prevented by using an algorithm to verify the BU message receives by the HA. Such threat can also be avoided when a new routing header is used to replaces the incorrect header that manoeuvres around firewall rules and obtaining a constrained address [16, 17]. V. Proposed Protection of BU Message Corresponding Author: XYZ, [emailprotected] Once the BU message is complete, the MN will receive normal traffic from the CN with the new CoA. The CN with the new nonce sends to the MN a Binding Update Verification (BUV) within a specific time frame e.g. 10 seconds. The MN then needs to reply within 10 seconds otherwise the connection between MN and CN will be terminated. This method minimises any damages caused by bombing attacks where packets are sent to the MN by malicious nodes. Cryptography Generated Address (CGA) can also be use to make spoofing type attacks more harder. Private keys can be use to signed the message as well. Since redirection attacks requires both public and private keys to perform[18-20]. Possible threats and solution is listed in table 1 [4, 17]. VI. Conclusion The requirement for Mobile IPv6 is still not complete considering there are some essential issues that are not addressed. One of the most important issues are protocol security because without secure protection against attacks, the protocol would not be accepted thus will not work at all. Presently, the standard method use for BU protection in transport mode as well as securing the connection for control message sent during home registration method is the Encapsulation Security Payload (ESP). IPSec has several advantages over SSL/TLS which is IPSec can perform without IP restriction, any protocol can be encrypted and also encrypt any packets with just their IP headers. Unfortunately, IPSec needs to be configured with various settings thus making it complicated. The IKE protocol can control the mutual authentication and cryptographic algorithm negotiations as well as dynamic key management. Additionally, authentication method such as shared secret, Extensible Authentication Protocol (EAP) or X.509 certificates can be use to create safe communication between peers. References/Bibliography G. Eason, B. Noble, and I. N. Sneddon, On certain integrals of Lipschitz-Hankel type involving products of Bessel functions, Phil. Trans. Roy. Soc. London, vol. 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Rakic, Cell Proliferation without Neurogenesis in Adult Primate Neocortex, Science, vol. 294, Dec. 2001, pp. 2127-2130, doi:10.1126/science.1065467. (Article in a journal) H. Goto, Y. Hasegawa, and M. Tanaka, Efficient Scheduling Focusing on the Duality of MPL Representatives, Proc. IEEE Symp. Computational Intelligence in Scheduling (SCIS 07), IEEE Press, Dec. 2007, pp. 57-64, doi:10.1109/SCIS.2007.357670. (Article in a conference proceedings) AUTHORS PROFILE Taro Denshi received the B.S. and M.S. degrees in Electrical Engineering from Shibaura Institute of Technology in 1997 and 1999, respectively. During 1997-1999, he stayed in Communications Research Laboratory (CRL), Ministry of Posts and Telecommunications of Japan to study digital beam forming antennas, mobile satellite communication systems, and wireless access network using stratospheric platforms. He now with DDI Tokyo Pocket Telephone, Inc.