Method and apparatus for secure communication of information between a plurality of digital audiovisual devices
First Claim
1. A method of providing secure communication of information between at least a first and second digital audiovisual device and characterised in that the second device receives a certificate comprising a transport public key encrypted by a management private key, the second device decrypting the certificate using an equivalent management public key and thereafter using the transport public key to encrypt information sent to the first device, the first device using an equivalent private key to decrypt the information.
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Accused Products
Abstract
The present invention relates to a method of providing secure communication of information between at least a first and second digital audiovisual device (30, 52) and characterized in that the first device (30) communicates to the second device (52) a certificate Ct(KpubT) comprising a transport public key KpubT encrypted by a management private key KpriMan, the second device (52) decrypting the certificate using an equivalent management public key KpubMan and thereafter using the transport public key KpubT to encrypt information sent to the first device, the first device using an equivalent private key KpriT to decrypt the information. The present invention is particularly applicable to a method of providing secure communication between a first and second decoder.
132 Citations
51 Claims
- 1. A method of providing secure communication of information between at least a first and second digital audiovisual device and characterised in that the second device receives a certificate comprising a transport public key encrypted by a management private key, the second device decrypting the certificate using an equivalent management public key and thereafter using the transport public key to encrypt information sent to the first device, the first device using an equivalent private key to decrypt the information.
- 13. A method of providing secure communication of information between a decoder device and a recorder device and characterised in that a first one of the devices communicates to the second device a certificate comprising a device public key encrypted by a management private key, the second device decrypting the certificate using an equivalent management public key and thereafter using the device public key to encrypt information sent to the first device, the first device using an equivalent device private key to decrypt the information.
- 33. A combination comprising a first and a second digital audiovisual device, wherein the second device is adapted to receive a certificate comprising a transport public key encrypted by a management private key, to decrypt the certificate using an equivalent management public key and thereafter to use the transport public key to encrypt information to be sent to the first device, the first device being adapted to use an equivalent private key to decrypt the information.
- 40. A combination comprising a decoder device and a recorder device, wherein a first one of the devices is adapted to communicate to the second device a certificate comprising a device public key encrypted by a management private key, the second device being adapted to decrypt the certificate using an equivalent management public key and thereafter to use the device public key to encrypt information sent to the first device, the first device being adapted to use an equivalent device private key to decrypt the information.
Specification