Patent ID: 8892882

Claim:
A content transmission security protection device, comprising memory, a digital interface, and characterized by further comprising a management/processing engine, the management/processing engine being configured in a specific chip in the content transmission security protection device; the digital interface being used for performing an authentication between the management/processing engine and the digital interface at the request of the management/processing engine in the content transmission security protection device; performing an authentication between the digital interface of the content transmission security protection device and a digital interface of a downstream receiver device; performing a key activation between the content transmission security protection device and the downstream receiver device to obtain an encryption key, wherein the encryption key is used as an initial key to encrypt content data to be transmitted by the digital interface; the management/processing engine being used for initiating an authentication between the management/processing engine and the digital interface in the content transmission security protection device; performing an authentication between the management/processing engine of the content transmission security protection device and a management/processing engine of a downstream receiver device; updating a revocation list stored in a local management/processing engine of the content transmission security protection device; and collecting communication link data from said downstream receiver devices.