A method for using cryptographic parameters in a postage meter for securing postage indicium data includes the steps of generating in the postage meter 1) first cryptographic parameters which are useable in conjunction with second cryptographic parameters by the postage meter to cryptographically secure...http://www.google.com.tw/patents/US6473743?utm_source=gb-gplus-share專利 US6473743 - Postage meter having delayed generation of cryptographic security parameters
