Research in Cryptology

This book constitutes the refereed proceedings of the 4th Western European Workshop on Research in Cryptology, WEWoRC 2011, held in Weimar Germany, in July 2011. <br>The 10 revised full papers were carefully reviewed and selected from numerour submissions. The papers span a wide spectrum of topics from foundations of cryptology, upto secret-key cryptosystems and hash functions, public-key cryptosystems, modes of operation, cryptographic protocols, hardware and software implementation of cryptosystems and their integration into secure systems, and applications such as watermarking and code obfuscation.