disrupted computer networks by various unpredictable factors, such as hackers, viruses, spam, errors, and system failures, computer systems hinder full utilization for a collaborative computing goals for the next generation of the Internet. Important modules treated include secure group communication, access control, dependability, grid computing, key management, intrusion detection, and trace back. Contents: Secure Group Communication (SGC); Cryptography-Based Access Control, Intrusion Detection and Defense, Security in Computing Grid, and Seamless Trusted Health Information System.