The number of World Wide Web users has risen to nearly 1.5 billion [58], a fifth of the world’s population. Development of innovative web based technologies has resulted in this explosive growth. Using the Web, end-users have benefited tremendously in numerous areas such as electronic commerce, health care and education. Due to the importance of these services, the web has attracted participation from a diverse populace.

In this scenario, the trend is progressing towards richer “Web 2.0” applications. Exciting and interactive user driven content such as blog,wiki entries and YouTube videos, are becoming the norm for web content rather than the exception, as evidenced by social networking sites such as Facebook. The growth of these sites has been fueled by highly attractive revenue models and business opportunities from advertising. As a result, we are moving away from a Web of static HTML pages to responsive, feature rich pages laden with content from several sources.With the rise in popularity of client-side scripting and AJAX, the web has been turned into a full fledged programming platform, enabling feature-rich applications to be implemented.

This book constitutes the refereed proceedings of the 6th International Conference on Information Systems Security, ICISS 2010, held in Gandhinagar, India, in December 2010. The 14 revised full papers presented together with 4 invited talks were carefully reviewed and selected from 51 initial submissions. The papers are organized in topical sections on integrity and verifiability, web and data security, access control and auditing, as well as system security.