Submission Deadline extended to May 13th!!1st International CNCCS Workshop on Security Aspects for Online Social Networks (CNCCS - SAONS)To be held in conjunction with the Sixth International Conference on Availability, Reliability and Security (ARES 2011)Online social networks are one of the most used Internet services and they consume most of the time users spend connected to the Internet. These sites allow sharing knowledge, help in finding and integrating communities and provide tools to develop activities together. However, they are prone to misuse such as identity theft, malware, spam and data leaking. The Spanish National Advisory Council on Cyber-Security (CNCCS) is the main sponsor of this workshop, which aims to bring together security research and industry with innovative and practical ideas in order to secure online social networks.Suggested topics, but not limited, are:Data security in Online Social Networks Data privacy in Online Social Networks Fraud and Scam in Online Social Networks Identity in Online Social Networks Spam filtering in Online Social Networks Malware in Online Social Networks Harassing in Online Social Networks Anonymity on Online Social Networks Propagation Models for Online Social Networks SponsorThe Spanish National Advisory Council on Cyber-Security (CNCSS) is a private initiative born in May 2009, which concerns about Spanish security industry.Important DatesSubmission Deadline: April 18th 2011May 13th 2011 (extended)Author Notificacion: May 18th 2011Camera-ready Versión submission: June 1stAuthor Registration: June 1stConference Dates: August 22nd-26thWorkshop: TBDSubmission GuidelinesThe submission guidelines valid for the CNCCS-SAONS workshop are the same as for the ARES conference. They can be found at:http://www.ares-conference.eu/submission-guidelinesOrganizing CommitteePablo García Bringas, University of Deusto, SpainPierangela Samarati, University of Milan, ItalyStefano Paraboschi, University of Bergamo, Italy