risk is placed on the security and privacy of the data. PVI, LoBot, and TVEM provide a means for clients to establish trust …

. Most systems began with few or no privacy controls and have gradually been adding and enhancing them to meet the demands of … their users. Until recently, for example, Facebook had only a binary notion of privacy - a friend could see everything. This … detriment. There is a need of strong privacy control mechanisms that factor in the dynamic changes in the user context relative …