Project Description

Facebook is one of the leading social networks. While it enables social activities irrespective of geolocation and time, social networks known to gather a significant amount of information about their users. Our challenge is to research technologies giving users more control about the data they disclose to the network while maintaining the facebook experience. We have developed and prototyped a mobile app that encrypts (broadcast) content, such as timeline posts, images and videos. Only friends meeting the posting user's privacy policy are entitled to decrypt the content. To this end we implemented a novel encryptions scheme, known as a predicate-private encryption scheme, enabling to encode a decryption policy into the secret keys of friends.

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