DEVICE AND METHOD FOR SELECTIVELY SUPPLYING ACCESS TO A SERVICE ENCRYPTED USING A CONTROL WORD, AND SMART CARD

摘要

Device (120), smart card (300) and method use the control word encrypted for selectively supply access and service (202). Service authorization data of (202) reception with entitlement control message (ECM) (203) and classifier comprising authorization data validity period. Just discovery is effective for service decryption ECM (203). Service (202) can store in storage medium such as DVD. It includes authorization data that one ECM transcoding module (211), which is supplied to from above-mentioned ECM (203) and obtains the ECM of the specific device of authorization data writing station (215),. The ECM of the specific device can be the device (120) of encryption and key specific to equipment (120) and/or including identifier.