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:
Feb. 26, 2019
Filed:
Oct. 24, 2016
Proton World International N.v., Diegem, BE;
Frank Cuypers, De Pinte, BE;
PROTON WORLD INTERNATIONAL N.V., Diegem, BE;
Abstract
The invention relates to a method of authentication of a contactless communication circuit, PICC, by a contactless communication terminal, PCD. Within the PICC, a first number is generated by encryption of a second random number, and the first number is sent to the PCD. Within the PCD, a third number is generated by decryption of the first number. Also within the PCD, a fourth number is determined and encrypted to generate a fifth number. The fifth number has first and second portions. Back within the PICC, a sixth number is determined, which is used in the determination of a seventh number. The seventh number is determined by encryption by a cipher block chaining operating mode of the sixth number with an initialization vector equal to the first portion. If the seventh number is different from the second portion, the authentication is interrupted.