Keyphrases
- access control
- fine grained
- data security
- dynamic access control
- security policies
- role based access control
- security mechanisms
- mobile devices
- security model
- databases
- security requirements
- access control models
- social context
- access control policies
- identity management
- security architecture
- access control mechanism
- role based access control model
- data protection
- trust relationships
- ubiquitous computing
- discretionary access control