An apparatus and method for enabling functionality of a component, wherein the apparatus includes a random number generating module for generating a random number, and a hash function module in communication with the random number generating module. A host is provided in communication with the random...http://www.google.ca/patents/US7634665?utm_source=gb-gplus-sharePatent US7634665 - Apparatus and method for secure field upgradability with unpredictable ciphertext
