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 four years of successful W2SP workshops. This year, we will additionally invite selected papers to a special issue of the journal.

We are seeking both short position papers (2–4 pages) and longer papers (a maximum of 10 pages). The scope of W2SP 2011 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