Patent ID: 7093300

Claim:
An electronic apparatus having a security function, said apparatus comprising: theft judging means for judging whether said electronic apparatus has been exposed to theft; inoperable state setting means for, in response to an output of said theft judging means, putting said electronic apparatus into an inoperable state against theft in which a predetermined operation of a controlled circuit is disabled when said theft judging means judges that said electronic apparatus has been exposed to theft; a nonvolatile individual code memory for storing an individual code individually assigned to said electronic apparatus; output means for outputting the individual code to a dealer-use calculation device external to said electronic apparatus; input means for inputting an individual judgment code which is obtained out of the individual code by being calculated based on a predetermined third relationship, which is common to all electronic apparatuses serviced by the dealer-use calculation device, the individual judgment code being effective only for said electronic apparatus and being received from the dealer-use calculation device; individual code relationship judging means for judging whether the individual judgment code inputted by said input means and the individual code have a predetermined second relationship; and inoperable state canceling means for canceling the inoperable state against theft when said individual code relationship judging means judges that the individual judgment code and the individual code have the predetermined second relationship.