A method of manufacturing a postage printing device that is to be registered by a registering entity having a public/private key pair. The manufacturing station has a manufacturing station public/private key pair. The method includes storing a root certificate comprising the registering entity public...http://www.google.com.hk/patents/US7433847?utm_source=gb-gplus-share專利 US7433847 - System and method for manufacturing and securing transport of postage printing devices
