This book constitutes the refereed proceedings of the 7th International Conference on Information Systems Security, ICISS 2011, held in Kolkata, India, in December 2011.
The 20 revised full papers presented together with 4 short papers and 4 invited papers were carefully reviewed and selected from 105 submissions. The papers are organized in topical sections on access control and authorization, malwares and anomaly detection, crypto and steganographic systems, verification and analysis, wireless and mobile systems security, Web and network security.

This book constitutes the refereed proceedings of the 11th International Conference on Information Systems Security, ICISS 2015, held in Kolkata, India, in December 2015. The 24 revised full papers and 8 short papers presented together with 4 invited papers were carefully reviewed and selected from 133 submissions. The papers address the following topics: access control; attacks and mitigation; cloud security; crypto systems and protocols; information flow control; sensor networks and cognitive radio; and watermarking and steganography.