公开(公告)号：US20250070972A1

公开(公告)日：2025-02-27

申请号：US18449355

申请日：2023-08-14

Applicant: NXP B.V.

Inventor： Mario Lamberger ,  Laurie Genelle

IPC: H04L9/30

Abstract: A method for carrying out an elliptic curve based cryptographic operation using a cryptographic processor with a first elliptic curve and α fixed interface, including: converting a second point on a second elliptic curve to a first point on the first elliptic curve using a first function interface of the cryptographic processor and a second function interface of the cryptographic processor; performing a point multiplication on the first point to produce a third point on the first elliptic curve using a point multiplication interface of the cryptographic processor; and converting the third point on the first elliptic curve to a fourth point on the second elliptic curve using the first function interface of the cryptographic processor and the second function interface of the cryptographic processor, wherein the first function interface of the cryptographic processor computes r+h·d mod n and the second function interface of the cryptographic processor computes x−1 mod n.