METHOD FOR PROTECTING A COMPUTER FROM THE MANIPULATION OF REGISTER CONTENTS AND A CORRESPONDING COMPUTER FOR CARRYING OUT THIS METHOD

摘要

In order to protect a computer from the manipulation of register contents, copies of registers (6; PC) to be protected are stored in separate redundancy registers (10a-10c). During each instruction execution, the contents of the register to be protected are compared with its copy. The instruction is executed only when the register contents match. When the register contents do not match, this implies that the contents of the register to be protected have been successfully manipulated, whereby an error handling is subsequently carried out.