The two-volume set LNCS 9014 and LNCS 9015 constitutes the refereed proceedings of the 12th
International Conference on Theory of Cryptography TCC 2015 held in Warsaw Poland in March
2015.The 52 revised full papers presented were carefully reviewed andselected from 137
submissions. The papers are organized in topicalsections on foundations symmetric key
multiparty computation concurrent and resettable security non-malleable codes and tampering
privacy amplification encryption an key exchange pseudorandom functions and applications
proofs and verifiable computation differential privacy functional encryption obfuscation.
