This book constitutes the refereed proceedings of the 10th International Conference on
Cryptology in India INDOCRYPT 2009 held in New Dehli India in December 2009. The 28 revised
full papers were carefully reviewed and selected from 104 submissions. The papers are organized
in topical sections on post-quantum cryptology key agreement protocols side channel attacks
symmetric cryptology hash functions number theoretic cryptology lightweight cryptology
signature protocols and multiparty computation.