Chaotic Keystream Generators for Additive Stream Ciphers

Communications security is vital in the information age. For this reason, cryptography the branch of cryptology dealing with the making of secure cipher systems the other branch, cryptanalysis, attempts to break such systems is no longer of concern only to the government, but also to private industry. We survey some current research concerning the generation of random and pseudorandom keystreams for use in cryptographic stream ciphers, including the use of chaotic discrete dynamical systems.