Public Key Cryptography - PKC 2007

Signatures I.- Full-Domain Subgroup Hiding and Constant-Size Group Signatures.- A Direct Anonymous Attestation Scheme for Embedded Devices.- Anonymous Signatures Made Easy.- On the Generic and Efficient Constructions of Secure Designated Confirmer Signatures.- Invited Talk I.- Cryptanalysis of Group-Based Key Agreement Protocols Using Subgroup Distance Functions.- Cryptanalysis.- Length Based Attack and Braid Groups: Cryptanalysis of Anshel-Anshel-Goldfeld Key Exchange Protocol.- New Chosen-Ciphertext Attacks on NTRU.- Cryptanalysis of the Paeng-Jung-Ha Cryptosystem from PKC 2003.- Protocols I.- Optimistic Fair Exchange in a Multi-user Setting.- Multi-party Stand-Alone and Setup-Free Verifiably Committed Signatures.- Knowledge-Binding Commitments with Applications in Time-Stamping.- Signatures II.- Efficient Ring Signatures Without Random Oracles.- Traceable Ring Signature.- Two-Tier Signatures, Strongly Unforgeable Signatures, and Fiat-Shamir Without Random Oracles.- Improved On-Line/Off-Line Threshold Signatures.- Multivariate Cryptosystems.- High Order Linearization Equation (HOLE) Attack on Multivariate Public Key Cryptosystems.- Cryptanalysis of HFE with Internal Perturbation.- ?-Invertible Cycles for ultivariate uadratic ( ) Public Key Cryptography.- Encryption.- Chosen-Ciphertext Secure Key-Encapsulation Based on Gap Hashed Diffie-Hellman.- Parallel Key-Insulated Public Key Encryption Without Random Oracles.- Multi-bit Cryptosystems Based on Lattice Problems.- Protocols II.- Practical and Secure Solutions for Integer Comparison.- Multiparty Computation for Interval, Equality, and Comparison Without Bit-Decomposition Protocol.- Identity-Based Traitor Tracing.- Verifiable Shuffle of Large Size Ciphertexts.- Invited Talk II.- A Survey of Single-Database Private Information Retrieval: Techniques and Applications.- Number Theoretic Techniques.- Deterministic Polynomial Time Equivalence Between Factoring and Key-Recovery Attack on Takagi's RSA.- Efficient