ALEXANDRIA, Va., Nov. 18 -- United States Patent no. 12,475,214, issued on Nov. 18, was assigned to THALES DIS FRANCE SAS (Meudon, France).
"Code flow protection with error propagation" was invented by Jean-Roch Coulon (Le Tholonet, France), Andre Sintzoff (Marseilles, France) and Zbigniew Chamski (Plock, Poland).
According to the abstract* released by the U.S. Patent & Trademark Office: "Provided is an execution system including a central processing unit (CPU), a system memory (SM) storing a genuine program (cGC) having ciphered instructions (Cl) stored at determined addresses. A secure agent component (SAC) is dedicated to the protection of the execution of the cGC. The SAC comprises a signature register (SR) storing an instruction flow...