Abstract: A portable electronic entity includes a communication interface (110) with a host terminal (TH), a conversion system (170) for a signal received in a secure multimedia data flow and an element to transmit to the host terminal a flow of multimedia data obtained from the secure multimedia data flow. It also includes systems (160) capable of allowing host terminal restitution of the multimedia data flow that was transmitted.

Abstract: The pocket portable electronic entity (400) includes: connection element (420) for removable connection to a host station (300), first members (460, 470, 471) for secure communication with a remote server (100) via the connection element and the host station, second members (450, 455) for communication between the secure first communication element and a second portable electronic entity (500), and elements (440, 445) for communicating to the remote server via the secure first communication means data received from the second portable electronic entity via the second communication members.