A method and apparatus authenticates a component (450) for use in a device (100). The device memory (122) stores a predetermined challenge and a predetermined response (212) associated with the predetermined challenge. The method detects whether the component has been coupled to the device. If the component...http://www.google.co.uk/patents/US7512795?utm_source=gb-gplus-sharePatent US7512795 - Method and apparatus for authenticating components
