Web 2.0 Security and Privacy 2012 Workshop Call for Papers On behalf of the workshop co-chairs and program chair, we would like to invite you participate in the 5th annual workshop on Web 2.0 Security and Privacy. Started in 2007, this successful series of workshops has attracted participation from both academia and industry, and participants from around the world. W2SP is co-located with the IEEE Security & Privacy Symposium. Important Dates Paper submission deadline: March 2, 2012 (11:59pm US-PST) Workshop acceptance notification date: March 30, 2012 Workshop date: Thursday, May 24, 2012 Consult the workshop website (http://www.w2spconf.com) for the submission site URL. W2SP brings together researchers, practitioners, web programmers, policy makers, and others interested in the latest understanding and advances in the security and privacy of the web, browsers and their eco-system. We have had five years of successful W2SP workshops. This year, we will additionally invite selected papers to a special issue of the journal. W2SP is held in conjunction with the IEEE Symposium on Security and privacy, which will take place from May 20-23, 2012, at the Westin St. Francis Hotel in San Francisco. W2SP will continue to be open-access: all papers will be made available on the workshop website, and authors will not need to forfeit their copyright. We are seeking both short position papers (2–4 pages) and longer papers (a maximum of 10 pages). The scope of W2SP 2012 includes, but is not limited to: Trustworthy cloud-based services Privacy and reputation in social networks Security and privacy as a service Usable security and privacy Security for the mobile web Identity management and psuedonymity Web services/feeds/mashups Provenance and governance Security and privacy policies for composible content Next-generation browser technology Secure extensions and plug-ins Advertisement and affiliate fraud Measurement study for understanding web security and privacy Any questions should be directed to the program chair: mfredrik@cs.wisc.edu.