Portable electronic entity capable of receiving broadcast multimedia data flow

1. A portable electronic entity, comprising:

a communication interface ( 110 ) configured to interface and communicate with a host terminal (TH);

a receiver ( 170 ) configured to receive a secure multimedia data stream;

a storage device enabled to store decryption information, the decryption information adapted to decrypt the received multimedia data stream;

an authorization device ( 160 ) enabled to authorize reproduction in the host terminal of multi-media contents of the received multimedia data stream; and

a memory having stored thereon an application configured to execute on a CPU of the host terminal,

the application comprising executable code configured for execution by the CPU of the host terminal,

wherein the authorization device ( 160 ) is configured to generate a session key and to incorporate the session key into the application stored in the memory,

wherein the interface is configured to, upon connection with the host terminal, transmit the application from the memory to the host terminal to be stored in a memory of the host terminal and executed by the CPU of the host terminal,

wherein the electronic entity includes a decrypting device that decrypts the secure multimedia data stream into a decrypted multimedia data stream, and

wherein the application, upon execution by the CPU of the host terminal, uses the session key to establish a secure encrypted communication channel with the authorization device ( 160 ), and

wherein the authorization device uses the session key to securely transmit the decrypted multimedia data stream to the host terminal via the secure encrypted communication channel established with the application executing on the host terminal.

2. The portable electronic entity according to claim 1 , wherein the authorization device comprises a disabling component configured to disable transmission of information to the host terminal, the disabling component being activated in case of non-reproduction of the multimedia data stream.

3. The portable electronic entity according to claim 2 , wherein the disabling component is adapted to command the transmitting interface to disable the transmission of the multimedia data stream.

4. The portable electronic entity according to claim 1 , wherein the reproduction device comprises a stopping mechanism adapted to command the receiver in such a manner as to prevent said conversion in the case of non-reproduction of the multimedia data stream.

5. The portable electronic entity according to claim 1 , wherein the received data stream processing application ( 151 ) is launched automatically after connection of the portable electronic entity ( 100 ) to the host terminal (TH).

6. The portable electronic entity according to claim 1 , wherein the communication interface ( 110 ) with the host terminal (TH) conforms to the USB standard.

7. The portable electronic entity according to claim 1 , wherein the portable electronic entity ( 100 ) is a USB key.

8. The portable electronic entity according to claim 1 , wherein the receiver further comprises a reception interface adapted to be connected to a reception antenna.

9. The portable electronic entity according to claim 1 , wherein the receiver further comprises a reception interface adapted to be connected to a cable network.

10. The portable electronic entity according to claim 1 , wherein the receiver further comprises a demodulator circuit.

11. A portable electronic entity, comprising:

a communication interface ( 110 ) configured to communicate with a host terminal (TH);

a receiver ( 170 ) configured to receive a wireless transmission stream;

an authorization device ( 160 ) enabled to authorize reproduction in the host terminal of the transmitted multimedia data stream;

a memory containing an application ( 151 ) for processing the multimedia data stream, the application being configured to be executed by a CPU of the host terminal; and

a loading component adapted to, after connection of the electronic entity to the host terminal, load said application into the host terminal (TH) and execute said application in the host terminal (TH),

wherein the authorization device, upon initiation of communication between the communication interface ( 110 ) and a communications bus of the host terminal (TH), generates a session key and stores said session key in the memory of the electronic entity and incorporates said session key into the application ( 151 ) in the memory, said application being subsequently transmitted to the host terminal via the communication interface ( 110 ), and

wherein the application ( 151 ), upon execution by the CPU of the host terminal (TH), causes the host terminal (TH) to communicate with the electronic entity and receive the transmission stream in an encrypted form based on said session key.