A data processing device able to keep a technique for generation of the key data in a key generating means secret from a developer of an authenticating means, wherein an authentication program has a description for calling up a function in a key generation program and entering identification data of...http://www.google.com.hk/patents/US7610488?utm_source=gb-gplus-share專利 US7610488 - Data processing device and method and program of same
