By Farooq Anjum
This publication addresses the issues and brings ideas to the protection problems with ad-hoc networks. subject matters integrated are hazard assaults and vulnerabilities, uncomplicated cryptography mechanisms, authentication, safe routing, firewalls, safety coverage administration, and destiny developments.
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Extra info for Security for Wireless Ad Hoc Networks
This is the property of diffusion. More precisely, diffusion dissipates the statistical structure of the plaintext over the bulk of the ciphertext. As a result, a change in a single bit of plaintext can result in changes to multiple ciphertext bits. In other words, the effect of a change in the plaintext is spread to many parts of the ciphertext. Classical transposition ciphers obtain the ciphertext from the plaintext by rearranging the order of letters. The actual letters used in the ciphertext are not altered from the plaintext.
Complexity of cryptographic mapping affects implementation and development costs as well as the realtime performance. In fact some ciphers are more efﬁcient when implemented in hardware and other ciphers are more efﬁcient when implemented in software. The effects of corrupt ciphertext during decryption indicate the error propagation characteristics of the cipher. This is also an important factor to consider given the lossy wireless links in an ad hoc environment. The estimated security level of a cipher can be assumed to be proportional to the amount of expert cryptanalysis withstood.
Chapter 2 discusses some of the fundamental concepts of cryptography that we leverage in later chapters. Several mechanisms for securing wireless ad hoc networks rely on cryptography and this chapter provides the foundation needed to understand such mechanisms. Communication is a basic function needed by the entities in the network. Further, communication between entities has to be done securely in order to protect against various attacks that can be launched by the adversaries. However, this is dependent on the sharing of cryptographic keys among the network entities.