| 摘要 |
Identifying tampering of an electronic document comprising generating a document digest, the document having associated one or more modification records and the document digest being a cumulative digest based on a digest of each of the modification records. Receiving a modified version of the document from a document modifier, the modified version having associated one or more 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 record and the additional modification records. Also 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 and the comparing the new document digest and the validation digest to determine if the modified version of the document has been tampered with. The digests may be generated using a hashing algorithm. |
