Scramble allows not only for the definition of access control rules for audience segregation, but also for the support of their enforcement, on the context of the European PrimeLife project.
To support the definition of access control rules we develop concepts that are general enough to describe access control rights for a variety of different social networking sites. We also investigate different means for enforcing access control using encryption techniques.
The Firefox extension provides the enforcement mechanism. The extension knows about the users' access control preferences and enforces it using encryption techniques. For the future we plan to integrate the extension with different social networking sites to automatically obtain a list of a user's connections and their grouping into different audiences. This should reduce the configuration and key management effort that users need to invest before being able to use our system.