| 摘要 |
A method for securely duplicating sensitive documents, wherein a "marking" identifying the confidential nature of a document and combined with encoded "rules" is defined by determining duplication restrictions; and, for each duplication request (101) for a sensitive document (102), said document is digitised (103) to determine the presence of a marking (104) and find the duplication restrictions (106). Duplication may be performed (110), depending on said restrictions (106), after an authorisation check (108). A duplicate may be obtained by requesting the computerised original of the document from the document issuer. The method is particularly suitable for preventing the duplication of documents for fraudulent purposes and the identical duplication of some documents. Furthermore, it is useful for copyright administration and enables the issuer to retain control over the use of any sensitive document without fear of forgery.
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