SDCS 2005. 2nd International Workshop on Security in Distributed Computing Systems, Held in conjunction with the 25th International Conference on Distributed Computing Systems (ICDCS-2005), Columbus, OH, USA, June 6-9,2005. (Submissions due 10 January 2005) In recent years, interest has increased in the field of security of distributed computing systems, since securing a large-scale networked system becomes a great challenge. These include the control mechanisms, mobile code security, denial-of-service attacks, trust management, modeling of information flow and its application to confidentiality policies, system composition, and covert channel analysis. We will focus our program on issues related to important properties of system security, such as measurability, sustainability, affordability, and usability in distributed computing systems. Topics of interest include but are not limited to: .. Distributed Access Control and Trust Management .. Key Management and Authentication .. Privacy and Anonymity .. Benchmark and Security Analysis .. Security for Peer to Peer systems and Grid Computing Systems .. Secure Multicast and Broadcast .. Secure multiparty and two-party computations .. Computer and Network Forensics .. Denial-of-service Attacks and Countermeasures .. Secure E-Commerce/E-Business .. Security Verification .. Distributed Database Security .. Digital Rights Management .. Secure Mobile Agents and Mobile Code .. Intrusion detection .. Viruses, Worms, and Other Malicious Code .. Security in ad-hoc and sensor networks .. World Wide Web Security More information can be found at the conference web site at http://securityworkshop.ece.iastate.edu