OFD-based electronic signature multi-version traceable rapid signature verification method

Abstract

The invention discloses an OFD-based electronic signature multi-version traceable rapid signature verification method. The method comprises the steps of analyzing an OFD file into a file structure composed of a plurality of XML files and other resource files; traversing all file object entrances in the file main entrance file, and judging whether each file object contains a signature according towhether each file object contains a signature list entrance or not; establishing an original text abstract comparison table for the file object containing the signature list; generating a difference contrast graph between signature versions according to the abstract record node difference between the existing signatures; and for all abstract nodes in each signature file, searching whether the original text abstract comparison table is recorded or not, and then performing comparison. And forming a signature verification report of the file object by comparing failure and verification failure return reasons. And verifying the electronic signature according to a standard to form a signature verification report for returning. According to the method, repeated calculation of the original text abstract is reduced, and the signature verification speed is greatly increased.

Description

technical field [0001] The invention relates to the technical field of OFD format files, in particular to an OFD-based electronic signature multi-version traceable rapid signature verification method. Background technique [0002] OFD (OpenFixed-layout) is a layout document standard with independent intellectual property rights in my country. Its software products have the characteristics of independent controllability, safety, technological advancement and presentation effects that do not change due to changes in software and hardware environments and operators. , plays an important role in electronic file storage and exchange. In order to replace the international standard PDF (PortableDocument Format), OFD has many features of PDF, including electronic signature, that is, electronic signature, to ensure the integrity of the document, the authenticity and non-repudiation of the signer, so it is also used more In electronic invoices, electronic documents, files, electronic ...

AI Technical Summary

Problems solved by technology

[0004] 1. How to speed up the signature verification when there are a large number of electronic signatures on one OFD?

[0005] 2. The traditional OFD signature verification will only tell whether the original text has been tampered with, but cannot know which parts have been tampered with

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