Cryptography and Network Security (4th Edition) by William Stallings

By William Stallings

In this age of viruses and hackers, of digital eavesdropping and digital fraud, protection is paramount. This good, updated instructional is a finished remedy of cryptography and community safeguard is perfect for self-study. Explores the elemental concerns to be addressed through a community safeguard strength via an academic and survey of cryptography and community safeguard expertise. Examines the perform of community protection through sensible purposes which were carried out and are in use at the present time. offers a simplified AES (Advanced Encryption typical) that permits readers to understand the necessities of AES extra simply. good points block cipher modes of operation, together with the CMAC mode for authentication and the CCM mode for authenticated encryption. contains an increased, up-to-date therapy of intruders and malicious software program. an invaluable reference for procedure engineers, programmers, procedure managers, community managers, product advertising and marketing group of workers, and method aid experts.

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Extra resources for Cryptography and Network Security (4th Edition)

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If the opponent is working with the encryption of some general prose message, he or she may have little knowledge of what is in the message. However, if the opponent is after some very specific information, then parts of the message may be known. For example, if an entire accounting file is being transmitted, the opponent may know the placement of certain key words in the header of the file. As another example, the source code for a program developed by Corporation X might include a copyright statement in some standardized position.

1 lists two other types of attack: chosen ciphertext and chosen text. These are less commonly employed as cryptanalytic techniques but are nevertheless possible avenues of attack. Only relatively weak algorithms fail to withstand a ciphertext-only attack. Generally, an encryption algorithm is designed to withstand a known-plaintext attack. Two more definitions are worthy of note. An encryption scheme is unconditionally secure if the ciphertext generated by the scheme does not contain enough information to determine uniquely the corresponding plaintext, no matter how much ciphertext is available.

800 treats availability as a property to be associated with various security services. However, it makes sense to call out specifically an availability service. An availability service is one that protects a system to ensure its availability. This service addresses the security concerns raised by denial-of-service attacks. It depends on proper management and control of system resources and thus depends on access control service and other security services. 5. 800. As can be seen the mechanisms are divided into those that are implemented in a specific protocol layer and those that are not specific to any particular protocol layer or security service.

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