This book constitutes the refereed proceedings of the 9th International Conference on Information Security and Cryptology, ICISC 2006, held in Busan, Korea in November/December 2006. The 26 revised full papers cover such topics as hash functions, block and stream ciphers, network security and access control, mobile communications security, forensics, copyright protection, biometrics, public key cryptosystems, and digital signatures.

Invited Talks.- RFID Privacy Based on Public-Key Cryptography.- Generic Attacks on Symmetric Ciphers.- Hash Functions - I.- Improved Collision Attack on the Hash Function Proposed at PKC'98.- Hashing with Polynomials.- Birthday Paradox for Multi-collisions.- Block and Stream Ciphers.- New Variant of the Self-Shrinking Generator and Its Cryptographic Properties.- On Constructing of a 32 ×32 Binary Matrix as a Diffusion Layer for a 256-Bit Block Cipher.- On Algebraic Immunity and Annihilators.- Efficient Implementation and Hardware.- High-Speed RSA Crypto-processor with Radix-4 Modular Multiplication and Chinese Remainder Theorem.- A High-Speed Square Root Algorithm in Extension Fields.- The Smallest ARIA Module with 16-Bit Architecture.- A Simpler Sieving Device: Combining ECM and TWIRL.- Network Security and Access Control.- Janus: A Two-Sided Analytical Model for Multi-Stage Coordinated Attacks.- A Time-Frame Based Trust Model for P2P Systems.- Spatial Context in Role-Based Access Control.- Mobile Communications Security.- An Efficient Scheme for Detecting Malicious Nodes in Mobile Ad Hoc Networks.- Mobile RFID Applications and Security Challenges.- Forensics.- An Efficient Forensic Evidence Collection Scheme of Host Infringement at the Occurrence Time.- Copyright Protection.- A Copy Protection Technique Using Multi-level Error Coding.- Digital Rights Management with Right Delegation for Home Networks.- Biometrics.- Fake Iris Detection Based on Multiple Wavelet Filters and Hierarchical SVM.- Hash Functions - II.- Multi-block Collisions in Hash Functions Based on 3C and 3C+ Enhancements of the Merkle-Damgård Construction.- Cryptanalysis of T-Function-Based Hash Functions.- Collision Search Attack for 53-Step HAS-160.- Public Key Cryptosystems.- Klein BottleRouting: An Alternative to Onion Routing and Mix Network.- New Constructions of Constant Size Ciphertext HIBE Without Random Oracle.- Digital Signatures.- A New Proxy Signature Scheme Providing Self-delegation.- Extended Sanitizable Signatures.