On Thursdays the USPTO publishes new pending patent applications. Both of today's Spotlight Applications concern aspects of conditional access systems. Assigned jointly to Hon Hai Precision Industry Co. (TW) and to Ambit Microsystems (CN), the first application discloses techniques for providing conditional access in broadcasting network. Assigned to the Electronics and Telecommunications Research Institute (KR), the second application discloses a conditional access system and method of using conditional access image.
20120051541, "Method and system for providing conditional access in broadcasting network," assigned jointly to Hon Hai Precision Industry Co., LTD. (TW) and to Ambit Microsystems (CN).
A method and system for providing conditional access (CA) between a headend and a receiver include scrambling media data of broadcast programs and encrypting control words according to a CA system used on the headend. The receiver includes a CA virtual machine. The receiver receives the broadcast program and encrypted control words, and determines whether the media data is scrambled. If the media data is scrambled, the CA virtual machine runs a CA instance matched with the CA system, gets entitled manage message (EMM), and determines whether CA algorithm identifier in the EMM matches with CA algorithm identifier of the CA instance. If the CA algorithm identifiers match, the encrypted control words are decrypted and the scrambled media data is descrambled. If the CA algorithm identifiers do not match, updated CA algorithm is downloaded and the CA instance which has updated its CA algorithm is run.
20120051540, "Conditional access system and method of using conditional access image," assigned to the Electronics and Telecommunications Research Institute (KR).
Provided are a conditional access system and a method of using a conditional access image. The conditional access system according to an exemplary embodiment of the present invention includes: a service key management client allocated with a service key from a service key management server using a service key distribution protocol; a download client downloading a conditional access image using the service key and requesting updating the service key to the service key management server through the service key management client when the downloading is completed; and an execution controller encrypting and storing the conditional access image using the service key updated in accordance with the request and recovering the conditional access image using the service key reacquired through the service key management client before executing the stored conditional access image.