Keyphrases
- access control
- social networks
- access control models
- trust relationships
- trust management
- policy enforcement
- usage control
- fine grained
- dynamic access control
- data security
- security policies
- role based access control model
- virtual communities
- security requirements
- security mechanisms
- online social networks
- security model
- identity management
- role based access control
- access control policies
- social media
- privacy aware
- rbac model
- social networking
- trust model
- social interaction
- access rights
- role assignment
- link prediction
- content sharing
- database security
- database