Secure mobile replication for collaborative virtual reality

Our paper describes how to share and distribute a scene tree among mobile workers. Thus, a participant can work on a disconnected basis to improve a sub-set of the global scene tree. The scene tree reforms automatically and consistently during a meeting and distant workers cooperate in real-time to build the shared scene. The system rests on a replication mechanism to provide private and shared workspaces. A distributed designation and protection of the scene tree is proposed. Moreover, work consistency is provided in a distributed way without limiting the ability of parallel working. A refreshment protocol enables to maintain accurate state for the replicas with few network consumption. Intensive usage of the User Datagram Protocol and multicasting enables to reach good performances. At last, authentication and confidentiality is provided for User Datagram Protocol and multicasting. Thus, the solution can be deployed easily, efficiently, securely and at low price over the Internet.