Methods and apparatus for protecting digital content

摘要

A processing system to serve as a source device for protected digital content comprises a processor and control logic. When used by the processor, the control logic causes the processing system to receive a digital certificate from a presentation device. The processing system then uses public key infrastructure (PKI) to determine whether the presentation device has been authorized by a certificate authority (CA) to receive protected content. The processing system may also generate a session key and use the session key to encrypt data. The processing system may transmit the encrypted data to the presentation device only if the presentation device has been authorized by the CA to receive protected content. Presentation devices and repeaters may perform corresponding operations, thereby allowing content to be transmitted and presented in a protected manner. Other embodiments are described and claimed.

主权项

1. A processing system to serve as a source device for protected digital content, the processing system comprising:
a processor and control logic which, when used by the processor, results in the processing system performing operations comprising: obtaining a repeat indicator, from a receiving device, that indicates whether the receiving device can transmit content to a downstream device; generating cipher data, based at least in part on (a) a session key, (b) at least one constant value obtained from a certificate authority (CA), and (c) the repeat indicator; using the cipher data to encrypt data; determining whether the receiving device has been authorized by the CA to receive protected content; and transmitting the encrypted data to the receiving device via a wireless connection only if the receiving device has been authorized by the CA to receive protected content.