Explore cutting-edge research in cryptography with the “FAST SOFTWARE ENCRYPTION: 15TH INTERNATIONAL WORKSHOP, FSE 2008” proceedings from The Bookish Owl. This volume features 26 revised full papers and 4 short papers, carefully selected from 72 submissions at the 2008 Lausanne workshop. Delve into essential topics like SHA collisions, innovative hash function designs, advanced block cipher cryptanalysis, efficient implementation aspects, stream cipher security, security bounds, and entropy. Essential reading for cryptographers, security professionals, and researchers seeking the latest advancements in fast and secure symmetric cryptology. Discover vital insights into cryptographic primitives for robust data protection and communication security.