This book constitutes the proceedings of the 8th International Conference on Applied Cryptography and Network Security, ACNS 2010, held in Beijing, China, in June 2010. The 32 papers presented in this volume were carefully reviewed and selected from 178 submissions. The papers are divided in topical sections on public key encryption, digital signature, block ciphers and hash functions, side-channel attacks, zero knowledge and multi-party protocols, key management, authentication and identification, privacy and anonymity, RFID security and privacy, and internet security.