Information recording device, recording medium, and information recording system

摘要

An information recording system includes a recording medium capable of limiting a function by password and an information recording device for controlling the recording medium. The recording medium stores an input password, counts updating event(s) of a password, stores the update count of the password, outputs information stored in the password related information storage according to a READ request issued from the information recording device, compares a input password with a password stored in the password register, limits a predetermined function of the recording medium according to the comparison result from the password comparator. The information recording device stores a password and a password identification ID which is associated with the update count of the password, selects a password with reference to the update count of the password and the password identification ID and outputs the selected password into the recording medium to compare the passwords.

主权项

1. An information recording system including a non-transitory recording medium capable of limiting a function by password and an information recording device for controlling the non-transitory recording medium, wherein
the non-transitory recording medium comprises: a password register operable to store an input password; a password update counter operable to count each updating event of a password, the password being stored in the password register;
a password related information storage operable to store an update count of the password;a password related information provider operable to output information stored in the password related information storage according to a READ request issued from the information recording device; a password comparator operable to compare an input password with a password stored in the password register; and a function limiter operable to limit a predetermined function of the recording medium according to the comparison result from the password comparator, and the information recording device comprises: a password manager operable to store a password and a password identification ID which is associated with the update count of the password; and a limitation cancel requester operable to: select a password stored in the password manager with reference to the update count of the password and the password identification ID output from the password related information provider; and output the selected password into the recording medium in order to cause the password comparator of the recording medium to compare the passwords.