公开(公告)号：US11354428B2

公开(公告)日：2022-06-07

申请号：US17067510

申请日：2020-10-09

Applicant: PROTON WORLD INTERNATIONAL N.V.

Inventor： Joan Daemen ,  Gilles Van Assche

IPC: G06F21/60 ,  G06F21/72

Abstract: A method encrypts, using an encryption circuit, a first data value having a number n of first binary words, each word having a number m of bits. The encrypting includes generating a second data value having a same number n of second binary words of m bits each and outputting a result of the encryption. The number n is an integer greater than or equal to 3, m and n do not have a common integer division, and n or m is even. A second binary word of the second data value having a rank i is equal to a sum of: a first binary word having a same rank i; and a product of: a complement of a first binary word having rank ((i+1)modulo n), shifted by a first number of bit positions; and a first binary word having rank ((i+2)modulo n), shifted by a second number of bit positions.

公开(公告)号：US11025426B2

公开(公告)日：2021-06-01

申请号：US16249799

申请日：2019-01-16

Applicant: PROTON WORLD INTERNATIONAL N.V.

Inventor： Joan Daemen ,  Michael Peeters

IPC: H04L9/32 ,  H04L9/00 ,  H04L9/06

Abstract: The disclosure concerns an encryption function applied to a first word, a second word, a third word, and a fourth word including: multiplying the third word by the fourth word; adding the result of the multiplication; subtracting the result of the addition to the second word from the result of the addition to the first word; adding the result of the subtraction; combining with a constant the result of the addition of the third word to the result of the subtraction; and multiplying by two the result of said combination and circularly shifting the codes of the respective results of the addition of the fourth word to the result of the subtraction, of the addition of the second word to the result of the multiplication, and of the addition of the first word to the result of the multiplication.