Abstract: A method for anonymous signature of a message executed by a member entity of a group. The method includes: registering the member entity with an administration entity of the group; generating by the member entity a trace from a trace generator calculated by at least one revocation entity and included in a public key of the group, the trace being invariant relative to the anonymous signatures generated by the member entity in accordance an anonymous signature scheme; blindly obtaining by the member entity a private group key; and generating at least one signature according to the anonymous signature scheme by using the private key, the signature comprising the trace.

Abstract: A method for anonymous signature of a message executed by a member entity of a group. The method includes: registering the member entity with an administration entity of the group; generating by the member entity a trace from a trace generator calculated by at least one revocation entity and included in a public key of the group, the trace being invariant relative to the anonymous signatures generated by the member entity in accordance an anonymous signature scheme; blindly obtaining by the member entity a private group key; and generating at least one signature according to the anonymous signature scheme by using the private key, the signature comprising the trace.

Abstract: A process and an associated system for management of a live streaming session posted directly on terminals connected to a communications network, the process includes stages of: sending invitations to the session to several invited terminals selected by a transmitting terminal; placing the transmitting and invited terminals in synchronized standby states depending on a predetermined synchronization duration, states during which the transmitting terminal is not transmitting the video stream to the destination of a multicast server in the session; when the transmitting terminal leaves its standby state to send a direct video stream to the broadcast server, allowing the invited terminals that have responded in the affirmative to the invitation to access the broadcast server to receive the continuously broadcast video stream.

Abstract: A process and an associated system for management of a live streaming session posted directly on terminals connected to a communications network, the process includes stages of: sending invitations to the session to several invited terminals selected by a transmitting terminal; placing the transmitting and invited terminals in synchronized standby states depending on a predetermined synchronization duration, states during which the transmitting terminal is not transmitting the video stream to the destination of a multicast server in the session; when the transmitting terminal leaves its standby state to send a direct video stream to the broadcast server, allowing the invited terminals that have responded in the affirmative to the invitation to access the broadcast server to receive the continuously broadcast video stream.