Topics of interest include, but are not limited to: Secure dynamic coalition environments Privacy control in collaborative environments Secure workflows for collaborative computing Policy-based management of collaborative workspace Secure middleware for large scale collaborative infrastructures Security and privacy issues in mobile collaborative applications Identity management for large scale collaborative infrastructures Semantic web technologies for secure collaborative infrastructure Trust models, trust negotiation/management for collaborative systems Access control models and mechanisms for collaboration environments Protection models and mechanisms for peer-to-peer collaborative environments Delegation, accountability, and information flow control in collaborative applications Intrusion detection, recovery and survivability of collaborative systems/infrastructures Security of web services and grid technologies for supporting multidomain collaborative applications Security and privacy challenges in cloud-based collaborative applications Insider threats in collaborative systems/applications