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内容説明 This book constitutes the refereed proceedings of the 7th International Conference on Applied Cryptography and Network Security， ACNS 2009， held in Paris-Rocquencourt， France， in June 2009. The 32 revised full papers presented were carefully reviewed and selected from 150 submissions. The papers are organized in topical sections on key exchange， secure computation， public-key encryption， network security， traitor tracing， authentication and anonymity， hash functions， lattices， and side-channel attacks.