PDF signature method and PDF signature system

Abstract

The invention discloses a PDF (Portable Document Format) signature method which comprises the following steps: firstly, uploading a PDF document, and displaying a PDF signature page; dragging the signature to a to-be-signed position; signature is determined, and a signature object set is obtained; analyzing the signature object set, and creating a signature domain; and finally performing electronic signature to generate a signature file. The invention further discloses a PDF signature system adopting the PDF signature method to work. According to the method, a common signature dictionary signVis mainly created, a signature result is updated to the signature dictionary, then each signature domain in the PDF document points to the reference of the signature dictionary signV, and finally thepurpose that a plurality of position signatures in one PDF document correspond to the same digital certificate is achieved.

Description

technical field [0001] The invention relates to the fields of encryption technology and PDF format file development, in particular to electronic signature technology, and in particular to a PDF signature method and a PDF signature system. Background technique [0002] With the development of technology, more and more enterprises, institutions and state agencies have adopted electronic office, which has greatly improved work efficiency, and PDF files have gradually become a common file format in various work fields. However, with the development of electronic office, security issues such as electronic documents are easy to be tampered with or copied have also emerged. The emergence of technologies such as electronic seals or electronic signatures has solved the above problems. Setting an electronic seal or signature in a PDF file can identify the identity of the signer of the electronic document to ensure the integrity of the document, and it can also indicate that the signe...

AI Technical Summary

Problems solved by technology

However, in practical applications, the defect of the first solution is that the form of embedding pictures will modify the original text of the document. If the PDF has been signed before, software such as Adobe will prompt that the original text has been tampered with, making the signature verification fail; the second solution is It will cause Adobe software to guide users to sign with a digital certificate in the place of the blank signature field, and there will be a red warning prompt at the head of the seal, and the user experience effect is not good

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