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Image forming apparatus, method for controlling writing data from the same to storage device, method for controlling reading data from storage device to the same, and replacement part therefor

  • US 7,546,469 B2
  • Filed: 07/06/2004
  • Issued: 06/09/2009
  • Est. Priority Date: 11/19/2003
  • Status: Expired due to Fees
First Claim
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1. An image forming apparatus configured to have a replacement part equipped with a storage device, the apparatus comprising:

  • a code part that adds an error detecting code to a target data set to be written in the storage device;

    an encrypting part that receives a plurality of addresses in which the target data set is to be written and encrypts a single target data set having the error detecting code, by using the plurality of addresses as parameters of the encryption to generate a plurality of encrypted data sets, each of the encrypted data sets having different values and being encrypted using one of the plurality of addresses; and

    a writing part that writes each of the encrypted data sets to a corresponding address in the storage device.

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