Three security and privacy researchers propose a cryptographic service for protecting user data on servers that manage real-time communication between users.The service is called DP5 (Dagstuhl Privacy Preserving Presence Protocol P, where the last P is for extra privacy) and permits the exchange of user information (indicators of presence) between the clients without revealing it to the server.Presence details generally consist of the current status of a friend (online/offline), …
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