| 摘要 |
FIELD: information technology. ^ SUBSTANCE: in the method, encrypted content data are recorded onto a recording medium. The value of the result of applying a hash function to the content data recorded after encryption is recorded onto the recording medium. A content certificate is also recorded onto the recording medium. Said certificate includes a hash table digest obtained by applying a second hash function to the value of the hashing result, and heading information. Heading information includes information on the number of hash table digests. ^ EFFECT: faster accessing to content playback. ^ 21 cl, 3 dwg |
