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:
Nov. 26, 2013
Filed:
Nov. 21, 2008
Matthew Robshaw, Paris, FR;
Henri Gilbert, Bures sur Yvette, FR;
Matthew Robshaw, Paris, FR;
Henri Gilbert, Bures sur Yvette, FR;
France Telecom, Paris, FR;
Abstract
An authentication method of a prover device by a verifier device using cryptographic coupons is provided, where a coupon includes a pseudo-random number r, where i is an index for labeling the coupon, and a reduced-coupon xsuch that x=ƒ(r), where ƒ is a predetermined one-way function, the method including the following steps: the verifier device sends a challenge consisting of a random value c to the prover device; the prover device sends to the verifier device a response y calculated by using the pseudo-random number r, the challenge c, and a secret key s belonging to the prover device; and the verifier device checks the validity of the response y based on the challenge c, the reduced-coupon xcorresponding to the pseudo-random number r, and a public key V corresponding to the secret key s, the reduced-coupon xbeing received by the verifier device from a source external to the prover device.