Patent ID: 7287160

Claim:
Randomly accessible recording medium recording audio and video data configuring a broadcast program and encoded into units as prescribed, comprising: encrypted formed of a plurality of blocks of said audio and video data encoded encrypted; a plurality of objects associated with said program and broadcast as a data broadcasting service; a plurality of decryption start location information provided to correspond to said plurality of objects and indicating a decryption start location starting decrypting encrypted data included in a block formed by encrypting audio and video data broadcast in synchronization with each object; and a plurality of offset information provided to correspond to said plurality of decryption start location information and indicating an amount offset between said decryption start location for encrypted data included in a single block and a random access location of said unit including audio and video data identical to a portion of audio and video data obtained by decrypting encrypted data included in said single block, wherein said random access location is located between said decryption start location for said single block and a decryption end location ending decrypting said encrypted data.