Printing system for validating printing consumable
US8370260B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jun 16, 2010 |
| Grant date | Feb 5, 2013 |
| Priority date | — |
| Expiry date | Apr 6, 2031 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N2101/00
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A printer system includes a printer and a printing consumable detachably mounted on the printer. The printer has a first integrated circuit which generates a random number, reference information using the random number and a secret key. The printing consumable has a second integrated circuit which generates validation information using the random number and the secret key received from the first integrated circuit. The printer also has processing circuitry configured for receiving the reference information from the first integrated circuit; receiving the validation information from the second integrated circuit; and comparing the reference information and validation information so as to validate the printing consumable device for use with the printer.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.