A value printing system is disclosed which provides for storing the indicia to be printed within a secure vault module. The vault module also provides for securely maintaining the system accounting data. Coupled to the vault module is a host module which in turn is coupled to a printer module, whereby...http://www.google.com.tw/patents/US4858138?utm_source=gb-gplus-share專利 US4858138 - Secure vault having electronic indicia for a value printing system
