System for advanced protection of consumable or detachable elements
US10052878B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Feb 8, 2016 |
| Grant date | Aug 21, 2018 |
| Priority date | — |
| Expiry date | Feb 8, 2036 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L2209/805
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A method of authenticating a consumable or detachable element of a continuous inkjet printer, (CIJ), comprising: the controller of the printer generating and dispatching a 1st item of random information to an authentication circuit of the element; encrypting the 1st item of random information by the authentication circuit using a 1st encryption algorithm and a 1st secret key to form a 1st item of encrypted random information; dispatching the 1st item of encrypted random information to the controller; encrypting the 1st item of random information by the controller using a 2nd encryption algorithm and a 2nd secret key to form a 2nd item of encrypted random information; and comparing the 1st item of encrypted random information with the 2nd encrypted item of random information. If the consumable element is authenticated, a shared key part of a 3rd key is dispatched by the consumable or detachable element to the CIJ.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.