Web 2.0 Trust (W2Trust), Trondheim, Norway in conjunction with IFIPTM 2008 http://www.sis.uncc.edu/~mshehab/W2Trust/index.html Web 2.0 has emerged as the adopted suite of technologies by developers, users and business. The new web 2.0 paradigm provides the technology that enables government, businesses and users to interact and integrate services and data and benefit The Wisdom of the Crowds. Because of strong collaborative nature of Web 2.0 applications, mechanisms for trust management are crucial for its healthy development. Trust in Web 2.0 opens several new vistas for researchers and practitioners. In particular, approaches to trust management designed for Web 1.0 need to be revisited. In Web 1.0 Trust was mostly related to e-commerce and security of the portal. The main trust issues were related to the website content, and authenticity of the source which posted data. With the advent of the Web 2.0 the issue of trust has shifted from the people or companies that run a site to focus more on the people that populate it. This new technology in fact enables users to interact and collaborate seamlessly. For example, using social networks users are engaging with each other at a one to one level in several ways, for business, pleasure, for knowledge sharing and so forth. The predominant issue is now whether one can trust the people on a site, since the content is being generated by anyone and then being rated by anyone. How to ensure that what other users write is true, authentic and will not misused is an open challenge. Trust evaluations are however fundamental to help users making the best decisions when sharing resources and data. Thus, the success of Web 2.0 strongly depends on the development of efficient, adequate and scalable trust models. During this one-day workshop attendees will discuss and analyze the problems of trust in the Web 2.0 arena, and the potential consequences in terms of privacy breaches and security vulnerabilities. The dominant focus of the workshop will be on presentation of refereed papers both long and short. We also plan on including a keynote and a panel discussion. We solicit papers, case studies, and participation from researchers, systems architects, vendor engineers, and users. Suggested topics include but are not limited to: * Secure Mashup Technologies. * Trust in Data Aggregation and Integration. * Trust in Service Oriented Architecture. * Security in Social Networks. * Trust in New Technologies Such as AJAX. * Trust models in Social Networks. * Web Services Security. * Trust in Grid Environments. Papers and Panel Due: 25th April 2008 (Extended) Authors Notified: 5th May 2008 Final Materials Due: 12th May 2008 Workshop: 21 June 2008