Document printout device having digital certificate store.

摘要

A document printout device 74 for receiving and printing out digital document 34. The printout device 74 comprises a store of digital certificate 90, each certificate being associated with a received digital document 12, and an audit log 94 comprising a list of received document entries. Each entry in the list contains a reference to one of the certificates in the store 90 and a unique identifier associated with a received digital document. The device is arranged to carry out an on-line authentication of a received certificate held in the store of received documents or even to carry out a batch of on-line authentications of received certificates held in the store of received documents.