| 摘要 |
A computer implemented method for identifying tampering of an electronic document, the method comprising the steps of: generating a document digest for the document, the document having associated one or more modification records and the document digest being a copulative digest based on & digest of each of the modification records; receiving a modified version of the document from a document modifier, the modified version of the document having associated one or sore additional modification records; generating a new document digest for the modified document, the new document digest being a cumulative digest based on a digest of each of the modification records and the additional modification records; generating a validation digest, the validation digest being a cumulative digest based on the document digest and a digest of each of the additional modification records; comparing the new document digest and the validation digest to determine if the modified version of the document has been tampered with. |
