The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Oct. 22, 2019
Filed:
Jul. 18, 2018
Dover Europe Sàrl, Vernier, CH;
Damien Bonneton, Hostun, FR;
DOVER EUROPE SÀRL, Vernier, CH;
Abstract
A method of authenticating a consumable or detachable element of a continuous inkjet printer comprising: the controller of the printer generating a 1item of random information that is dispatched to an authentication circuit of the element; encrypting the 1item of information by the authentication circuit using a 1encryption algorithm and a 1secret key to form a 1item of encrypted random information; dispatching the 1item of information to the controller; encrypting the 1item of information by the controller using a 2encryption algorithm and a 2secret key to form a 2item of encrypted random information; comparing the 1item of encrypted random information with the 2encrypted item of random information to authenticate the consumable element; and if the consumable element is authenticated, dispatching at least one part of a 3key, termed the shared key, by the element to the printer.