Data recording device and data reproduction apparatus, as well as data integrity check system data tampering check method, and data tampering checking device

摘要

PPROBLEM TO BE SOLVED: To efficiently perform forge check of data recorded in a recording medium. PSOLUTION: A MAC value generated for respective files belonging to a directory 122A and ICV(D-ICV) generated based on the MAC value of all files belonging to the directory 122A are stored in a sequence page 121A. sequence pages 121A, 121B, ..., made respectively for all directories 122A, 122B, ..., on a disk and ICV generated based on the D-ICV stored in all sequence pages 121A, 121B, ..., are stored in a sequence block 114. Since the MAC value is managed being closed for each directory by sequence pages 121A, 121B, ..., data forge check can be performed for each directory. PCOPYRIGHT: (C)2007,JPO&INPIT