Wenderoth, Lind & Ponack, LLP
Information recording device, recording medium, and information recording system
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.
Panasonic Intellectual Property Management Co., Ltd.
G
G06F
inventional
Takeshi Haruo
Otsuka Ohta