The two-volume set LNCS 10174 and 10175 constitutes the refereed proceedings of the 20th IACR International Conference on the Practice and Theory in Public-Key Cryptography, PKC 2017, held in Amsterdam, The Netherlands, in March 2017. The 34 revised papers presented were carefully reviewed and selected from 160 submissions. They are organized in topical sections such as Cryptanalysis, Protocols, Encryption Schemes, Leakage-Resilient and Non-Malleable Codes, Number Theory and Diffie-Hellman, Encryption with Access Control, Special Signatures, Fully Homomorphic Encryption, Real-World Schemes, Multiparty Computation and Primitives.

This book constitutes the refereed proceedings of the 5th International Conference on Information Theoretic Security, held in Amsterdam, The Netherlands, in May 2011.
The 12 revised full papers presented together with 7 invited lectures were carefully reviewed and selected from 27 submissions. Understanding the minimal requirements for information-theoretic security is a central part of this line of research. Very attractive is the mathematical neatness of the field, and its rich connections to other areas of mathematics, like probability and information theory, algebra, combinatorics, coding theory, and quantum information processing, just to mention the most prominent ones.