Free Essays on Analysis Of IPsec

Topic: Analysis of IPsec. 1) IPSec protocol is used for creating means for secure exchange of information between systems and networks on the Internet. IPsec protocol helps users to create â€Å"private groups† based on common interest, independently from specifications of the networks they are using. 2) IPSec protocol includes two protocols: Authentication Header (AH) and Encapsulating Secure Payload (ESP). AH creates an envelope that ensures authentication of the source of the information, the completeness and protection from double messaging. à ¼ This way AH offers layers of ways to protect from malicious users. With help of AH every packet is authenticated, which makes ineffective programs that are trying to capture the administration of the session. Besides this AH protocol tries to ensure the authentication of the headers of IP-packets, not depending on the location of the IP-headers outside of the envelope it is creating. AH Authentication prevents IP-header line manipulation during the transfer of the packet. Because of this reason protocol cannot be used in the environment where NAT (Network Address Translation – is a mechanism used for transferring network addresses) is being used. This is because NAT requires IP-header manipulation, which AH Authentication will not allow. à ¼ ESP protocol ensures confidentiality of the information and executes functions of the AH protocol protection of the encrypted not authenticated information. IPSec specification allows ESP protocol use without AH functions. However, it’s not a good idea to do this, unless you really know what you are doing and why. In ESP protocol it’s possible to use fictitious encryption, which is equal to AH implementation without IP-header. This allows using NAT mechanism, because in this method the addresses in the headers can be modified. ESP and AH protocols are registered in IANA organization (Internet Address Naming Authority) and are ... Free Essays on Analysis Of IPsec Free Essays on Analysis Of IPsec Topic: Analysis of IPsec. 1) IPSec protocol is used for creating means for secure exchange of information between systems and networks on the Internet. IPsec protocol helps users to create â€Å"private groups† based on common interest, independently from specifications of the networks they are using. 2) IPSec protocol includes two protocols: Authentication Header (AH) and Encapsulating Secure Payload (ESP). AH creates an envelope that ensures authentication of the source of the information, the completeness and protection from double messaging. à ¼ This way AH offers layers of ways to protect from malicious users. With help of AH every packet is authenticated, which makes ineffective programs that are trying to capture the administration of the session. Besides this AH protocol tries to ensure the authentication of the headers of IP-packets, not depending on the location of the IP-headers outside of the envelope it is creating. AH Authentication prevents IP-header line manipulation during the transfer of the packet. Because of this reason protocol cannot be used in the environment where NAT (Network Address Translation – is a mechanism used for transferring network addresses) is being used. This is because NAT requires IP-header manipulation, which AH Authentication will not allow. à ¼ ESP protocol ensures confidentiality of the information and executes functions of the AH protocol protection of the encrypted not authenticated information. IPSec specification allows ESP protocol use without AH functions. However, it’s not a good idea to do this, unless you really know what you are doing and why. In ESP protocol it’s possible to use fictitious encryption, which is equal to AH implementation without IP-header. This allows using NAT mechanism, because in this method the addresses in the headers can be modified. ESP and AH protocols are registered in IANA organization (Internet Address Naming Authority) and are ...

Greatest Inventions essays

Greatest Inventions essays When asked what is the most important invention, many questions come to mind, and these inquiries must be answered before responding to the initial question. What is meant by the word invention? Essentially, anything that did not exist previously, whether it is a mechanical device or art, literature, or music, is an "invention". Is the most important invention a tool, a mechanical gadget, a concept or an idea that impacted or improved humanity as a whole (in terms of evolution, a new way of thinking, and connectedness)? What makes the invention or innovation important to humankind? What is the definition of most important? Not everyone has the same definitions and answers to the common questions involved in the discussion of humanitys connectedness and awareness of the world around them. The final answer immensely depends on the definition of important and the impact the invention had on humankind. There is not a single invention that is more important than the others, because they all contribute to the significant effects of change and evolution in civilization. If I had to narrow down my choices of the most important invention, after considering the massive array of discoveries and innovations that have surfaced over the far and recent centuries, I would choose the scientific method and the invention of the telescope and the microscope. They are both inventions that have not only transformed the way people live but the way they experience life. The scientific method is an important invention because it requires that we ask questions of nature with experimentation. It is an invention because humans actively and consciously thought it up. The greatest thing is, that one idea turned into many more ideas and concepts. The Ancient Greeks were impelled to understand the world around them and they believed that they could understand the world rationally because they supported the notion of co...

Analyze diets Essay Example | Topics and Well Written Essays - 750 words

Analyze diets - Essay Example The Atkins diet and South Beach diet vary in their carb phases, intake, and convenience, giving people more alternatives between low carb diets (Bowden, p.9). A person will know and make a decision which diet may work well for them by distinguishing the differences and similarities among these two diets. South Beach and Atkins diets both begin with a strict two-week introduction/induction phase where carbs are controlled. A person will bid adios to pasta, rice, sugar, bread and even alcohol as he/she is on proteins and select non-starchy vegetables. After this phase, healthy carbs like fruits and whole grains are gradually reintroduced, and dieters stick on this phase until their target weight is realized. The third phase, permanent phase, is intended to assist followers keep the pounds off by working a more moderate version of the program as a way of life. One of the main differences among the two diets is their structure. Atkins is vastly disciplined, necessitating dieters to observe of every carb they consume (Atkins, p.1) Food choices are more limited on Atkins, which may be a risk to food lovers that get jaded easily. In comparison, South Beach dieters are advised to test with a range of foods so as to find the low-carb alternatives that appeal most to them (Agatston, p. 5) Desserts are permitted on South Beach, and this polite allowance assists dieters remain to the program and be motivated. Another difference between the two diets is health. Both programs depend on recipes that include animal and other fats, but South Beach strains lean meat. Many physicians have expressed distress over the high level of saturated fats taken by Atkins dieters. Bacon cheeseburgers and ham may make them think they’ve achieved their health goal but an Atkins dieter that makes a decision to take the protein to justify binging on high-fat foods isn’t going to get happy results from their doctor at their annual medical check-up. South Beach takes a stronger stress on