Abstract: A high definition multimedia interface (HDMI) plug is provided that relates to connector technologies, which achieves a purpose of a concise appearance and convenience in use while resolving the problem of plug interference. The plug in the present invention includes a plug body and an HDMI interface connecting to an external socket, where the HDMI interface plug further includes an insulation housing disposed between the plug body and the HDMI interface, where one end of the HDMI interface is disposed inside the insulation housing and the other end is disposed outside the insulation housing, and the insulation housing and the plug body are connected in a rotatable manner. Embodiments are used for connection to an audiovisual device.

Abstract: 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.