Method and device for performing national cryptologic electronic signature processing on PDF (Portable Document Format) document

Abstract

The embodiment of the invention provides a method and a device for performing national cryptologic electronic signature processing on a PDF (Portable Document Format) document. The method comprises the following steps: selecting an electronic seal, constructing a signature dictionary structure which conforms to PDF standard according to the electronic seal and filling the signature dictionary structure in the PDF document; constructing P7 data comprising an electronic signature, which conforms to the PDF standard, according to the electronic seal and textual data filled with the signature dictionary structure, and filling the P7 data into the signature dictionary structure; extracting textual data of the PDF document filled with the P7 data, sealing the textual data of the PDF document filled with the P7 data by using the electronic seal to generate national cryptologic electronic signature data, and filling the national cryptologic electronic signature data into the signature dictionary structure to obtain the PDF document comprising the national cryptologic electronic signature data. By using the method and the device, the PDF document sealed by the national cryptologic electronic signature data conforms to the PDF standard and also supports the national cryptologic electronic signature standard, so the security of the PDF document is effectively improved.

Description

technical field [0001] The invention relates to the technical field of electronic signatures, in particular to a method and device for processing national secret electronic signatures on PDF documents. Background technique [0002] With the development of technology, more and more enterprises, institutions and state agencies have gradually adopted electronic office, which has greatly improved work efficiency. What follows is the security problem brought by the electronic office. Since the electronic document is easy to be copied or tampered with, whether the issued electronic document has been modified or not issued by the issuer will follow. The emergence of electronic signature products solves the above problems and provides a technical basis for the security requirements of electronic documents. [0003] As a widely used international standard format, the PDF document format is of great significance to support the application of electronic signatures. The existing PDF d...

AI Technical Summary

Problems solved by technology

[0004] The technology supporting electronic signatures in the above-mentioned PDF document standards does not conform to the electronic signature standards formulated by the State Secrets Bureau. Only electronic signatures are made on documents, lacking the concept of electronic seals, and non-standard procedures for affixing and verifying seals, and Does not support the national secret SM2 algorithm, etc., it is only an application of electronic signature, and does not represent an electronic signature product that meets the national secret standard

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