Topics in Cryptology –- CT-RSA 2015This book constitutes the refereed proceedings of the Cryptographer's Track at the RSA Conference 2015, CT RSA 2015, held in San Francisco, CA, USA, in April 2015. The 26 papers presented in this volume were carefully reviewed and selected from 111 submissions. The focus of the track is on following subjects: timing attacks, design and analysis of block ciphers, attribute and identity based encryption, membership, secure and efficient implementation