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:
Apr. 21, 2020
Filed:
Dec. 15, 2015
Giesecke & Devrient Gmbh, München, DE;
Rainer Urian, Augsburg, DE;
GIESECKE+DEVRIENT MOBILE SECURITY GMBH, Munich, DE;
Abstract
A pseudonymous Diffie-Hellman protocol is provided by means of a combination of the CA protocol with the RI protocol. According to the invention the determining of the pseudonym from the RI protocol and the forming of the secure communication channel from the CA protocol occur substantially in parallel. According to the invention there is likewise employed a group key for the CA part of the protocol according to the invention. Due to the configuration of the protocol according to the invention it is not possible, in contrast to the known protocols, for an attacker who should succeed in establishing the group key of a portable data carrier according to the invention, to generate the pseudonym of another user.