Unit using operating system and image forming apparatus using the same

摘要

A chip mountable on a customer replaceable unit monitoring memory (CRUM) unit used in an image forming job includes a central processing unit (CPU) with an operating system (OS) thereof, which is separate from an OS of the image forming apparatus, to perform at least one of authentication and cryptographic data communication with a main body of an image forming apparatus by executing one cryptographic algorithm corresponding to a set state from among a plurality of pre-provided cryptographic algorithms, using the OS thereof. The security of a unit on which the chip is mounted can thereby be reinforced and random changes of data of the unit can be prevented.

主权项

1. A customer replaceable unit monitoring (CRUM) unit which is mounted to a replaceable unit used in an image forming apparatus, the CRUM unit comprising:
a memory unit which comprises a record region where state information of the replaceable unit is recorded and a memory recovery region; an interface unit which is connected with a main controller provided in the image forming apparatus through a serial interface, to receive use information on the replaceable unit; and a CPU which backs up a record value recorded in the record region to the memory recovery region, sets a starting flag to a predetermined value, and updates state information recorded in the record region according to the received use information, when the use information is received.