Cryptographic Hardware and Embedded Systems - CHES 2009

CHES 2009, the 11th workshop on Cryptographic Hardware and Embedded Systems, was held in Lausanne, Switzerland, September 6–9, 2009. The wo- shop was sponsored by the International Association for Cryptologic Research (IACR). The workshop attracted a record number of 148 submissions from 29 co- tries, of which the Program Committee selected 29 for publication in the wo- shop proceedings, resulting in an acceptance rate of 19.6%, the lowest in the history of CHES. The review process followed strict standards: each paper - ceived at least four reviews, and some asmanyaseightreviews. Membersofthe Program Committee were restricted to co-authoring at most two submissions, and their papers were evaluated by an extended number of reviewers. The ProgramCommittee included 53 members representing 20 countries and ? ve continents. These members were carefully selected to represent academia, industry, and government, as well as to include world-class experts in various research ? elds of interest toCHES. The Program Committee was supported by 148 external reviewers. The total number of people contributing to the - view process, including Program Committee members, external reviewers, and Program Co-chairs, exceeded 200. The papers collected in this volume represent cutting-edge worldwide - search in the rapidly growing and evolving area of cryptographic engineering.