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:
Sep. 14, 2021
Filed:
Jul. 25, 2019
Emc Ip Holding Company Llc, Hopkinton, MA (US);
Christopher Ronald Scott, Caboolture, AU;
Aaron Matthew Marks, Boondall, AU;
Eric Young, Annerley, AU;
Sean Francis Parkinson, Indooroopilly, AU;
EMC IP Holding Company LLC, Hopkinton, MA (US);
Abstract
Techniques are provided for protection of private keys in message signing based on elliptic curve cryptography. One method comprises obtaining a private key to generate a signature for a message; selecting a random integer as an internal private key in a predefined range based on an elliptic curve order; computing an internal public key as an elliptic curve point using a scalar multiply operation based on (i) the internal private key blinded using a random blinding value, (ii) an elliptic curve base point, and (iii) an inverse value for the random blinding value added to a result of the scalar multiply operation; generating a first signature portion based on the elliptic curve point; generating a second signature portion based on an inverse of the selected random integer generated from a message-dependent value and the first signature portion; and forming a signed message using the first and second signature portions.