network security -- system security -- public key cryptography -- privacy -- authentication -- security analysis.- access control.

This book constitutes the refereed proceedings of the 6 th International Conference on Network and System Security, NSS 2012, held in Wuyishan, Fujian, China, in November 2012. The 39 revised full papers presented were carefully reviewed and selected from 173 submissions. The papers cover the following topics: network security, system security, public key cryptography, privacy, authentication, security analysis, and access control.