ALEXANDRIA, Va., Aug. 6 -- United States Patent no. 12,381,729, issued on Aug. 5, was assigned to STMICROELECTRONICS BELGIUM (Machelen, Belgium).
"Protection of a secret key" was invented by Thierry Simon (Wezembeek-Oppem, Belgium) and Gilles Van Assche (Woluwe-St-Lambert, Belgium).
According to the abstract* released by the U.S. Patent & Trademark Office: "A device multiplies a first public key by a first scalar value, generating an intermediate result. The first public key corresponds to a point on an elliptic curve of order n, n is an integer, and the first scalar value is equal to n/m where in is a largest prime integer factor of n. The device determines whether the intermediate result is equal to a value corresponding to a point O at...