Systems and Methods of Verifying Operational Information Associated with an Imaging Device
AssigneeLexmark International, Inc.
InventorsChristopher Alan Adkins, Mark Leo Doerre
Life of this patent
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Abstract
The invention is directed to a method for performing failure analysis on an imaging device that includes retrieving an encrypted error log containing one or more error conditions that occurred on the imaging device, decrypting the retrieved encrypted error log, determining if the retrieved encrypted error log has been altered based on the decrypted error log, and upon determining that the retrieved encrypted error log has not been altered, performing failure analysis on the imaging device using the decrypted error log.
Claims20
A method for performing failure analysis on an imaging device, comprising:
- retrieving an encrypted error log containing one or more error conditions that occurred on the imaging device;
- decrypting the retrieved encrypted error log;
- determining if the retrieved encrypted error log has been altered based on the decrypted error log;
- and
- upon determining that the retrieved encrypted error log has not been altered, performing failure analysis on the imaging device using the decrypted error log.
A method for determining user tampering of encrypted print cartridge data relating to one or more print cartridges installed in an imaging device, comprising:
- retrieving an encrypted print cartridge data from a plurality of stored encrypted data relating to the one or more print cartridges installed in the imaging device;
- determining if the retrieved encrypted print cartridge data has been altered by decrypting the retrieved encrypted print cartridge data;
- determining if at least one of the plurality of stored encrypted data has been deleted by matching a number of instances the plurality of stored encrypted data was gathered to a number of the plurality of stored encrypted data;
- and
- upon determining that the retrieved encrypted print cartridge data has not been altered, and that none of the plurality of stored encrypted data has been deleted, determining that the encrypted print cartridge data has not been tampered.
A method for validating a warranty claim on an imaging device, comprising:
- interrogating the imaging device for an encrypted data file containing one or more serial numbers of one or more print cartridges installed in the imaging device;
- determining if the retrieved encrypted data file has been altered by decrypting the retrieved encrypted data file;
- determining if at least one of the serial numbers contained in the encrypted data file corresponds to a counterfeit print cartridge;
- and
- upon determining that the retrieved encrypted data file has not been altered and if none of the serial numbers contained in the encrypted data file corresponds to a counterfeit print cartridge, validating the warranty claim.
Dependencies are inferred from the claim text.