On the security, privacy and usability of online seals

This report analyses the conditions under which online security and privacy seals (OSPS) can be deployed to support users to make an informed trust decision about Web services and their providers with respect to the provided security and privacy. This report is motivated by the numerous policy documents, that mention marks, seals, logos, icons, (collectively referred as OSPS) as a mean enabling users to judge on the trustworthiness of services offered on the Web.