Thisbook constitutes the refereed proceedings of the Cryptographer's Track at theRSA Conference 2016, CT-RSA 2016, held in San Francisco, CA, USA, in February/March2016.The26 papers presented in this volume were carefully reviewed and selected from 76submissions. The focus of the track is on following subjects: secure keyexchange schemes, authenticated encryption, searchable symmetric encryption,digital signatures with new functionality, secure multi party computation, howto verify procedures, side-channel attacks on elliptic curve cryptography, hardwareattacks and security, structure-preserving signatures, lattice cryptography, cryptanalysisof symmetric key encryption, message authentication code and PRF-security, and securityof public key encryption.