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:
Jun. 09, 2020
Filed:
May. 31, 2018
Nxp B.v., Eindhoven, NL;
Bjorn Fay, Schleswig-Holstein, DE;
NXP B.V., Eindhoven, NL;
Abstract
Various embodiments relate to a method of hashing a message M using a block cipher, including: producing N block cipher inputs by XORing message indices i, . . . i+N−1 respectively with state values S, . . . S, wherein N is an integer greater than 1; producing N block cipher keys by XORing N different blocks of message M and at least one of state values S, . . . Sfor each of the N block cipher keys; encrypting the N block cipher inputs using the respective N block cipher keys to produce N block cipher outputs; combining the N block cipher outputs with N block cipher inputs to produce N block cipher combined outputs T, for t=0, . . . , N−1; calculating Y=T; calculating Y=Y⊕T, for t=1, . . . , N−1, calculating S'=Y<<<a, where a is a number of bits to rotate where S′, . . . , S′ are new state values; and calculating S′=Y⊕S′, for t=0, . . . , N−2.