Patent ID: 6999587
Filing Date: 2006-02-14
Classification: G11B

Abstract:
1. An information recording/playback system for recording and playing back information, comprising: an authentication data recording control part which provides control of detecting random pattern information based on random physical phenomena from a random-pattern-information recording part used for recording random pattern information based on random physical phenomena, creating medium identification information from the random pattern information, and recording, as authentication data, the medium identification information in an authentication data recording part on the information recording medium; an authentication processing part which detects the random pattern information from the random-pattern-information recording part, creates medium-identification-information verification data from the random pattern information, reads authentication data from the authentication data recording part on the information recording medium, and performs authentication processing for the information recording medium based on medium-identification-information verification data created from the random pattern information and based on the authentication data; and an information recording/playback control part which provides control of recording information on an information recording medium and playing back information from an information recording medium based on an authentication result from the authentication processing part; wherein the authentication data recording control part records, as authentication data, the medium identification information together with a digital signature of a person who recorded the medium identification information in the authentication data recording part on the information recording medium.