Patent EA-002703-B1 (EA)
Title: Mechanism for matching a receiver with a security module
Inventor: KUDELSKI ANDRE
IPC: H04N21/418
Filed: 1999-05-06
Abstract: 1. A system for receiving a pay television comprising a receiver (A) and security modules (C,D,F), wherein said receiver (A) receives information of descrambling from said security modules (C,D,F), characterized in that at least part of the information (4,6) transmitted from said security modules (C,D,F) to the receiver (A) is encrypted by means of an encryption key unique for the receiver (A). 2. The system for receiving a pay television according to claim 1, characterized in that unique encryption key is a common for a group of receivers. 3. The system for receiving a pay television according to claim 1 or 2, characterized in that at least part of the information (3,5) transmitted from the receiver (A) to said security modules (C,D,F) is encrypted by means of said that unique encryption key. 4. The system for receiving a pay television according to any of claims 1 to 3, characterized in that the receiver (A) comprises a personal number which can be stored in said security modules (C,D,F), wherein the receiver (A) is adapted to verify at any moment the conformity of said personal number stored in said security modules (C,D,F). 5. The system for receiving a pay television according to claim 4, characterized in that said personal number comprises a part identifying the group of receivers and a part identifying the receiver itself and verification of apparent conformity is effective for the part identifying the group of receivers. 6. The system for receiving a pay television according to any of claims 1 to 3, characterized in that said security modules (C,D,F) comprise a detachable module (7) of descrambling and security, which comprises a control unit (B) and a security unit (C) responsible for descrambling and authorization for receiving video information. 8. The system for receiving a pay television, comprising a receiver (A) connected to said security modules (C,D,F), wherein said receiver (A) receives information of descrambling from said security modules (C,D,F), characterized in that said security module comprises a detachable module (C) of security and a detachable module (D) of descrambling, comprising a control unit (B), wherein at least part of confidential or necessary information for functioning the control unit (B) is encrypted by the detachable module of security by means of said unique encryption key prior to transmitting to the detachable module of descrambling. 9. The system for receiving a pay television according to claim 8, characterized in that at least part of information (3) transmitted from said detachable module (D) of descrambling is encrypted by means of said unique encryption key. 10. The system for receiving a pay television according to claim 8 or 9, characterized in that the detachable module (D) of descrambling comprises a personal number, which can be stored in the detachable module (C) of security, wherein said detachable module (D) of descrambling is adapted to verify at any moment the conformity of said personal number inscripted in said detachable module (C) of security. 11. The system for receiving a pay television according to claim 10, characterized in that said personal number comprises a part identifying a group of detachable modules (D) of descrambling and a part identifying the detachable module (D) of descrambling itself and verification of apparent conformity is effective for the part identifying the group of detachable module (D) of descrambling. 12. The system for receiving a pay television according to any of claims 9 to 11, characterized in that at least part of information (5) transmitted from the receiver (A) to the detachable module (D) of descrambling is encrypted by means of said unique encryption key. 13. The system for receiving a pay television according to any of claims 9 to 12, characterized in that at least part of information (5) transmitted from the detachable module (D) of descrambling to the receiver (A) is encrypted by means of said unique encryption key. 14. The system for receiving a pay television according to claim 12 or 13, characterized in that the the receiver (A) comprises a personal number, which can be stored in detachable module (D) of descrambling, wherein said receiver (A) is adapted to verify at any moment the conformity of said personal number inscripted in said detachable module (D) of descrambling. 15. A method for controlling information in the system for receiving a pay television between a receiver (A) and security modules (C,D,F), wherein said security modules (C,D,F) transmit information to said receiver (A) permitting to descramble audio and video signal, characterized in that at least one unique encryption key is stored in the memory in the receiver (A) on one side and in the security modules on the other side and information transmitted between the receiver (A) and the security modules are encrypted and decrypted by means of at least one of said unique encryption keys. 16. The method according to claim 15, characterized in that a personal number of the receiver (A) is stored in the security modules during an operation of initialization and the receiver (A) is adapted to verify at any moment the conformity of said personal number stored in said security modules (C,D,F). 17. A detachable module (C) of security destined for connecting to the receiver (A) as a part of the system for receiving a pay television, comprising at least one power-independent memory unit destined for storing of confidential or necessary information for functioning the descrambling module and transmission means with the receiver (A), characterized in that said detachable module (C) of security comprises means for transmission encryption, and said power-independent memory unit further comprises at least one encryption key which effects the operation of the encryption transmission means. 18. The detachable module (C) of descrambling, which is a part of the system for receiving a pay television and comprising a control unit (B), first transmission means (3,4) with the detachable module (C) of security, second transmission means (5,6) with the receiver (A), and said power-independent memory unit further comprises at least one encryption key effecting the operation said first encryption means destined for encryption of said first communication means (3,4) of transmission. 19. The detachable module (C) of descrambling according to claim 18, characterized in that comprises second encryption means, and said power-independent memory unit comprises at least one encryption key effecting the operation said second encryption means destined for encryption of said second communication means (5,6) of transmission. 20. A descrambling receiver (A) for of the system for receiving a pay television comprising transmission means to security modules (C,D,F) and said power-independent memory unit, characterized in that further comprises transmission encryption means from said security modules (C,D,F) and to them, and said power-independent memory unit comprises at least one encryption key effecting the operation the means of transmission encryption.