Authentication I -- Commitment and Authentication Systems -- Unconditionally Secure Blind Signatures -- Keynote Lecture -- Random Systems: Theory and Applications -- Group Cryptography -- Optimising SD and LSD in Presence of Non-uniform Probabilities of Revocation -- Trade-Offs in Information-Theoretic Multi-party One-Way Key Agreement -- Improvement of Collusion Secure Convolutional Fingerprinting Information Codes -- Private and Reliable Message Transmission -- On Exponential Lower Bound for Protocols for Reliable Communication in Networks -- Almost Secure (1-Round, n-Channel) Message Transmission Scheme -- Invited Talk -- Construction Methodology of Unconditionally Secure Signature Schemes -- Authentication II -- New Results on Unconditionally Secure Multi-receiver Manual Authentication -- Unconditionally Secure Chaffing-and-Winnowing for Multiple Use -- Invited Talk -- to Quantum Information Theory -- Secret Sharing -- Strongly Multiplicative Hierarchical Threshold Secret Sharing -- Secret Sharing Comparison by Transformation and Rotation -- Invited Talk -- Anonymous Quantum Communication -- Applications of Information Theory -- Efficient Oblivious Transfer Protocols Achieving a Non-zero Rate from Any Non-trivial Noisy Correlation -- Cryptographic Security of Individual Instances.

This book constitutes the thoroughly refereed post-conference proceedings of the Second International Conference on Information Theoretic Security, ICITS 2007, held in Madrid, Spain, in May 2007. The 13 revised full papers presented in this volume were carefully reviewed and selected from 26 submissions. There were one invited keynote speech and 3 invited talks to the conference. The topics covered are authentication, group cryptography, private and reliable message transmission, secret sharing, and applications of information theory.