This book constitutes the refereed proceedings of the Fourth International Symposium on Algorithmic Game Theory, SAGT 2011, held in Amalfi, Italy, in October 2011. The 26 revised full papers presented together with 2 invited lectures were carefully reviewed and selected from 65 submissions. The papers are organized in topical sections on auctions and advertising, quality of solutions, externalities, mechanism design, complexity, network games, pricing, as well as routing games.

The two-volume set LNCS 9614 and 9615 constitutes the refereed proceedings of the 19th IACR International Conference on the Practice and Theory in Public-Key Cryptography, PKC 2016, held in Taipei, Taiwan, in March 2016.
The 34 revised papers presented were carefully reviewed and selected from 143 submissions. They are organized in topical sections named: CCA security, functional encryption, identity-based encryption, signatures, cryptanalysis, leakage-resilient and circularly secure encryption, protocols, and primitives.

The two-volume set LNCS 9614 and 9615 constitutes the refereed proceedings of the 19th IACR International Conference on the Practice and Theory in Public-Key Cryptography, PKC 2016, held in Taipei, Taiwan, in March 2016.
The 34 revised papers presented were carefully reviewed and selected from 143 submissions. They are organized in topical sections named: CCA security, functional encryption, identity-based encryption, signatures, cryptanalysis, leakage-resilient and circularly secure encryption, protocols, and primitives.

This book constitutes the refereed proceedings of the 15th International Conference on Cryptology and Network Security, CANS 2016, held in Milan, Italy, in November 2016.The 30 full papers presented together with 18 short papers and 8 poster papers were carefully reviewed and selected from 116 submissions.