This book constitutes the thoroughly refereed post-proceedings of the 9th Annual International Workshop on Selected Areas in Cryptology, SAC 2002, held in St. John's, Newfoundland, Canada, in August 2002. The 25 revised full papers presented were carefully selected from 90 submissions during two rounds of reviewing and improvement. The papers are organized in topical sections on elliptic curve enhancements, SNOW, encryption schemes, differential attacks, Boolean functions and stream ciphers, block cipher security, signatures and secret sharing, MAC and hash constructions, and RSA and XTR enhancements.

SAC'99 was the sixth in a series of annual workshops on Selected Areas in Cryptography. Previous workshops were held at Carleton University in Ottawa (1995 and 1997) and at Queen's University in Kingston (1994, 1996, and 1998). The intent of the annual workshop is to provide a relaxed atmosphere in which researchers in cryptography can present and discuss new work on selected areas of current interest. The themes for the SAC'99 workshop were: { Design and Analysis of Symmetric Key Cryptosystems { E cient Implementations of Cryptographic Systems { Cryptographic Solutions for Web/Internet Security The timing of the workshop was particularly fortuitous as the announcement by NIST of the v e nalists for AES coincided with the rst morning of the workshop, precipitating lively discussion on the merits of the selection! A total of 29 papers were submitted to SAC'99 and, after a review process that had all papers reviewed by at least 3 referees, 17 were accepted and p- sented. As well, two invited presentations were given: one by Miles Smid from NIST entitled \From DES to AES: Twenty Years of Government Initiatives in Cryptography"and the other by Mike Reiter from Bell Labs entitled \Password Hardening with Applications to VPN Security". The program committee for SAC'99 consisted of the following members: Carlisle Adams, Tom Cusick, Howard Heys, Lars Knudsen, Henk Meijer, Luke O'Connor, Doug Stinson, Stao rd Tavares, and Serge Vaudenay.

This book contains revised selected papers from the 23rd International Conference on Selected Areas in Cryptography, SAC 2016, held in St. John's, NL, Canada in August 2016. The 28 full papers and 2 invited papers presented in this volume were carefully reviewed and selected from 100 submissions. They are organized in the following topical sections: side channels and fault attacks; design and implementation of symmetric cryptography; efficient symmetric primitives; cryptanalysis of symmetric primitives; MACs and PRNGs; lattice-based cryptography; and cryptanalysis of asymmetric primitives.