Cryptography and Coding

The ninth in the series of IMA Conferences on Cryptography and Coding was held (as ever) at the Royal Agricultural College, Cirencester, from 16-18 Dec- ber 2003. The conference's varied programme of 4 invited and 25 contributed papers is represented in this volume. The contributed papers were selected from the 49 submissions using a - reful refereeing process. The contributed and invited papers are grouped into 5 topics: coding and applications; applications of coding in cryptography; cryp- graphy; cryptanalysis; and network security and protocols. These topic headings represent the breadth of activity in the areas of coding, cryptography and c- munications, and the rich interplay between these areas. Assemblingtheconferenceprogrammeandthisproceedingsrequiredthehelp of many individuals. I would like to record my appreciation of them here. Firstly, I would like to thank the programme committee who aided me - mensely by evaluating the submissions, providing detailed written feedback for the authors of many of the papers, and advising me at many critical points - ring the process. Their help and cooperation was essential, especially in view of the short amount of time available to conduct the reviewing task. The c- mittee this year consisted of Mike Darnell, Mick Ganley, Bahram Honary, Chris Mitchell, Matthew Parker, Nigel Smart and Mike Walker.

Coding and Applications. - Recent Developments in Array Error-Control Codes. - High Rate Convolutional Codes with Optimal Cycle Weights. - A Multifunctional Turbo-Based Receiver Using Partial Unit Memory Codes. - Commitment Capacity of Discrete Memoryless Channels. - Separating and Intersecting Properties of BCH and Kasami Codes. - Applications of Coding in Cryptography. - Analysis and Design of Modern Stream Ciphers. - Improved Fast Correlation Attack Using Low Rate Codes. - On the Covering Radius of Second Order Binary Reed-Muller Code in the Set of Resilient Boolean Functions. - Degree Optimized Resilient Boolean Functions from Maiorana-McFarland Class. - Differential Uniformity for Arrays. - Cryptography. - Uses and Abuses of Cryptography. - A Designer s Guide to KEMs. - A General Construction of IND-CCA2 Secure Public Key Encryption. - Efficient Key Updating Signature Schemes Based on IBS. - Periodic Sequences with Maximal Linear Complexity and Almost Maximal k-Error Linear Complexity. - Cryptanalysis. - Estimates for Discrete Logarithm Computations in Finite Fields of Small Characteristic. - Resolving Large Prime(s) Variants for Discrete Logarithm Computation. - Computing the M = UU t Integer Matrix Decomposition. - Cryptanalysis of the Public Key Cryptosystem Based on the Word Problem on the Grigorchuk Groups. - More Detail for a Combined Timing and Power Attack against Implementations of RSA. - Predicting the Inversive Generator. - A Stochastical Model and Its Analysis for a Physical Random Number Generator Presented At CHES 2002. - Analysis of Double Block Length Hash Functions. - Network Security and Protocols. - Cryptography in Wireless Standards. - On the Correctness of Security Proofs for the 3GPP Confidentiality and Integrity Algorithms. - A General Attack Model on Hash-BasedClient Puzzles. - Tripartite Authenticated Key Agreement Protocols from Pairings. - Remote User Authentication Using Public Information. - Mental Poker Revisited.