Secure means for generating a specific key from unrelated parameters

Abstract

A technique and method for improving the security of the usage of a key in devices or systems with modes of operation that must be secured whereby the key has multiple fields with timing information that must be matched to transitions of a randomly generated clock, the randomly generated clock derived from a fixed frequency clock, whereby tampering of the fixed frequency clock will result in detection of the security attack and exit from the secure mode of operation.

Dependencies are inferred from the claim text.