| 摘要 |
A method of generating documents and verifying their authenticity firstly requires controler access to a document creation system so that only authorised users can create documents. User data which identifies a user of the system is recorded, and verification data is generated from both the user data and data corresponding to documents generated using the system. Authentication data corresponding to the verification data is recorded, and the document is then printed with a machine readable portion containing the verification data. The machine readable portion is typically a two dimensional bar code or symbol. When the document is presented, the verification data is read from it, for example by optical scanning, and compared with retrieved authentication data to indicate whether or not the document is authentic.
|
