Patent ID: 9158901
Filing Date: 2015-10-13
Classification: G06F

Abstract:
1. A system for device security, the system comprising: at least one integrated circuit comprising a CPU; a key register storing a hardware enabling key, the key comprising a number of bits, such that each bit of the number of bits has a value, and if any one bit of the number of bits is set to an incorrect value the key will not function correctly; a combination circuit for performing a function, ƒ, such that the combination circuit is activated by the key, the combination circuit only performing function ƒ if each one of the number of bits of the key is set to the value of that one bit, and there exists no set of intermediate or output bits derived from the number of bits of the key, which determine if the combination circuit performs function ƒ, said set intermediate or output bits comprising fewer bits than comprise the key.