Book excerpt: This book constitutes the refereed proceedings of the 9th IFIP WG 8.8/11.2 International Conference on Smart Card Research and Advanced Application, CARDIS 2010, held in Passau, Germany, in April 2010. The 16 revised full papers presented were carefully reviewed and selected from numerous submissions. The papers are organized in topical sections on mathematical algorithms; side channel analysis; systems; logical attacks; fault analysis; and privacy.