Abstract: The invention relates to information security technologies, provides a content security transmission device and a content security transmission system which separate data transmission function of a digital interface from data management and processing function thereof, and provides a content security transmission method based on the device and the system. The content security transmission protection device comprises digital interfaces and a management/processing unit, the management/processing unit is configured in a specific chip in the device, used for updating a revocation list stored therein and collecting information from downstream devices. A transmitting device and a forwarding device in the content security transmission protection system comprise digital interfaces and management/processing units.

Abstract: The invention relates to an identity authentication and key negotiation method. In order to overcome the defects in the prior art that security of authentication methods is not high, the invention discloses an identity authentication and shared key generation method. In the technical solution of the invention, a key authority issues a pair of public key and private key which are matched, and sets a correlation coefficient k, an offset vector {right arrow over (e)}, a regression coefficient a, a modulus m as well as , and {right arrow over (e)}.

Abstract: The invention relates to information security technologies, provides a content security transmission device and a content security transmission system which separate data transmission function of a digital interface from data management and processing function thereof, and provides a content security transmission method based on the device and the system. The content security transmission protection device comprises digital interfaces and a management/processing unit, the management/processing unit is configured in a specific chip in the device, used for updating a revocation list stored therein and collecting information from downstream devices. A transmitting device and a forwarding device in the content security transmission protection system comprise digital interfaces and management/processing units.

Abstract: The invention relates to an identity authentication and key negotiation method. In order to overcome the defects in the prior art that security of authentication methods is not high, the invention discloses an identity authentication and shared key generation method. In the technical solution of the invention, a key authority issues a pair of public key and private key which are matched, and sets a correlation coefficient k, an offset vector {right arrow over (e)}, a regression coefficient a, a modulus m as well as , and {right arrow over (e)}.