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:
May. 08, 2012
Filed:
May. 07, 2008
Mathieu Ciet, Paris, FR;
Augustin Farrugia, Cupertino, CA (US);
Jean-francois Riendeau, Santa Clara, CA (US);
Nicholas T. Sullivan, Sunnyvale, CA (US);
Mathieu Ciet, Paris, FR;
Augustin Farrugia, Cupertino, CA (US);
Jean-Francois Riendeau, Santa Clara, CA (US);
Nicholas T. Sullivan, Sunnyvale, CA (US);
Apple Inc., Cupertino, CA (US);
Abstract
Disclosed herein are systems, method and computer readable medium for providing authentication of an entity B by an entity A. In the method, entity A selects a value p, a range [a, b] and a granularity epsilon. Entity A sends p, [a, b], and epsilon to entity B. Entity B initializes a value y=0 and for each x in {a, a+epsilon, . . . , b−epsilon, b} and computes z=E(x)*x. The function E(x) is an encryption scheme and the multiplication is carried out mod p. Entity B updates y=y+z. After processing each x, entity B sends yto entity A. Entity A performs the same calculation and generates a yvalue and compares ywith y. If y=y, Entity A authenticate entity B. In one aspect, a light HMAC scheme splits an input x into n blocks with key expansion.