Techniques are disclosed to enable efficient implementation of secure hash functions and/or stream ciphers. More specifically, a family of graphs is described that has relatively large girth, large claw, and/or rapid mixing properties. The graphs are suitable for construction of cryptographic primitives...http://www.google.com/patents/US20050175176?utm_source=gb-gplus-sharePatent US20050175176 - Primitives for fast secure hash functions and stream ciphers
