Image forming apparatus and method for controlling the security of an exchangeable part

• US 7,526,581 B2
• Filed: 09/07/2004
• Issued: 04/28/2009
• Est. Priority Date: 09/04/2003
• Status: Active Grant

• Current Assignee: Ricoh Company Limited
• Original Assignee: Ricoh Company Limited
• Inventors: Omotani, Toshikatsu
• Primary Examiner(s): Tsai; Henry W. H.
• Assistant Examiner(s): Mamo; Elias
• Application Number:
  US10/934,595
• Publication Number:
  US 20050100376A1
• Time in Patent Office: 1,694 Days
• Field of Search: 710 1- 74, 348207-232, 386/101, 396/452, 347/19, 327/41, 455/555, 382/100
• US Class Current: 710/15
• CPC Class Codes: G03G 21/1882 details of the communication with memory, e.g. wireless communication, protocols
• CPC Class Codes: G03G 21/1892 for presence detection, authentication

Abstract

An image forming apparatus, includes a memory and a processor. The memory stores a maintenance ID of an exchangeable part that can be attached to and detached from the main body of the apparatus, and storing information with regard to the exchangeable part. The processor reads out the maintenance ID of the exchangeable part from the memory, encrypts information relating to the exchangeable part stored in the memory and decrypts information encrypted by the processor. The processor also identifies whether decrypting information is necessary based on the maintenance ID read out by the ID reading unit or not.

Claims

1. An image forming apparatus, comprising:

an exchangeable part that can be attached to and detached from a main body of the apparatus, the exchangeable part including a memory configured to store a maintenance identification (ID) of the exchangeable part and to store information relating to the exchangeable part; and

a processor configured to;

read out the maintenance ID of the exchangeable part from the memory,

determine that the information relating to the exchangeable part stored in memory is encrypted information or decrypted information based on the maintenance ID read out by the processor,

encrypt the information relating to the exchangeable part stored in the memory when it is determined that the information relating to the exchangeable part stored in memory is decrypted, and

decrypt information encrypted by the processor when it is determined that the information relating to the exchangeable part stored in memory is encrypted,

wherein encryption and decryption of information is performed by the processor in order to control the security of internal data of the exchangeable part when the exchangeable part is detached from the main body, and

wherein the processor is further configured to;

detect whether the exchangeable part is in a process of being detached from the image forming apparatus, and

encrypt the information relating to the exchangeable part stored in the memory when the processor detects that the exchangeable part is in the process of being detached from the main body of the apparatus but before such process of being detached is ended.

2. A method of controlling an image forming apparatus, comprising the steps of:

storing a maintenance identification (ID) of an exchangeable part that can be attached to and detached from a main body of the apparatus, and also storing information relating to the exchangeable part, in a memory of the exchangeable part;

reading out the maintenance ID of the exchangeable part from the memory;

determining that the information relating to the exchangeable part stored in memory is encrypted information or decrypted information based on the maintenance ID read out by the processor;

encrypting the information relating to the exchangeable part stored in the memory when it is determined that the information relating to the exchangeable part stored in memory is decrypted;

decrypting information encrypted by the encrypting step when it is determined that the information relating to the exchangeable part stored in memory is encrypted,

wherein encryption and decryption is performed in order to control the security of internal data of the exchangeable part when the exchangeable part is detached from the main body,

detecting whether the exchangeable part is in a process of being detached from the image forming apparatus; and

encrypting the information relating to the exchangeable part stored in the memory when it is detected that the exchangeable part is in the process of being detached from the main body of the apparatus but before such process of being detached is ended.