Key Exchange -- Group Key Exchange Enabling On-Demand Derivation of Peer-to-Peer Keys -- Session-state Reveal Is Stronger Than Ephemeral Key Reveal: Attacking the NAXOS Authenticated Key Exchange Protocol -- Secure Pairing of "Interface-Constrained" Devices Resistant against Rushing User Behavior -- How to Extract and Expand Randomness: A Summary and Explanation of Existing Results -- Secure Computation -- Novel Precomputation Schemes for Elliptic Curve Cryptosystems -- Practical Secure Evaluation of Semi-private Functions -- Secure Hamming Distance Based Computation and Its Applications -- Efficient Robust Private Set Intersection -- Public-Key Encryption -- A New Variant of the Cramer-Shoup KEM Secure against Chosen Ciphertext Attack -- An Efficient Identity-Based Online/Offline Encryption Scheme -- Dual-Policy Attribute Based Encryption -- Construction of Threshold Public-Key Encryptions through Tag-Based Encryptions -- Network Security I -- Malyzer: Defeating Anti-detection for Application-Level Malware Analysis -- A New Message Recognition Protocol with Self-recoverability for Ad Hoc Pervasive Networks -- Traitor Tracing -- Breaking Two k-Resilient Traitor Tracing Schemes with Sublinear Ciphertext Size -- Tracing and Revoking Pirate Rebroadcasts -- Authentication and Anonymity -- Efficient Deniable Authentication for Signatures -- Homomorphic MACs: MAC-Based Integrity for Network Coding -- Algorithmic Tamper Proof (ATP) Counter Units for Authentication Devices Using PIN -- Performance Measurements of Tor Hidden Services in Low-Bandwidth Access Networks -- Hash Functions -- Cryptanalysis of Twister -- Cryptanalysis of CubeHash -- Collision Attack on Boole -- Network Security II -- Integrity Protection for Revision Control -- Fragility of the Robust Security Network: 802.11 Denial of Service -- Fast Packet Classification Using Condition Factorization -- Lattices -- Choosing NTRUEncrypt Parameters in Light of Combined Lattice Reduction and MITM Approaches -- Broadcast Attacks against Lattice-Based Cryptosystems -- Partial Key Exposure Attack on CRT-RSA -- Side-Channel Attacks -- How to Compare Profiled Side-Channel Attacks? -- Theoretical and Practical Aspects of Mutual Information Based Side Channel Analysis -- Attacking ECDSA-Enabled RFID Devices.

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 fundtions, lattices, and side-channel attacks.