| 摘要 |
A method of generating a self-authenticating document while utilizing document digest stored on a server for verification purposes. Authentication information for the document is encoded in barcode which is printed on the document. A document digest is calculated from the authentication information and transmitted to a server to be stored. When authenticating a scanned copy of the document, the barcode is read to extract the authentication information. A target document digest is calculated from the extracted authentication information and transmitted to the server for verification. The server compares the target document digest with the previously stored document digest. If they are not the same, the barcode has been altered. If they are the same, the extracted authentication information is used to authenticate the scanned copy. A document ID may be generated and transmitted to the server, and used by the server to index or search for the stored document digest.
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