OFD format real estate electronic certificate file signature method and system

Abstract

The invention discloses an OFD format real estate electronic certificate file signature method and system. The method comprises the steps of obtaining a digital signature certificate; encoding the file stream to generate a first signature original text value; performing Hash operation on each file in the original text protection domain one by one to obtain each Hash value as a second signature original text value; performing signature operation on the signature certificate and the first signature original text value to obtain a first digital signature value; performing signature operation on the signature certificate and the second signature original text value to obtain a second digital signature value; and performing signature verification on the first digital signature value and the second digital signature value respectively by utilizing the signature verification certificate and the first signature original text value, performing signature after the signature verification is passed, and writing the second digital signature value into the self-defined structure of the signature data domain to complete signature. According to the invention, the information interaction between the real estate service system and the certificate relying service is ensured to be safe, efficient and convenient, and the integrity and effectiveness of the certificate file are ensured.

Description

technical field [0001] The invention relates to the technical field of digital signatures, in particular to a method and system for signing real estate electronic license documents in OFD format. Background technique [0002] With the gradual advancement of the country's "Internet + government services", local government departments are rapidly implementing electronic certificates and full-process electronic paperless management reforms in order to innovate government work models, improve administrative efficiency and service levels, and promote public online applications. The whole process of administrative examination and approval items and business handling of license application is electronic. The generation and application of electronic certificates is the latest measure to implement the relevant requirements of "Internet + government services" and comprehensively promote "process reengineering". efficiency. [0003] The types of electronic certificates for real estat...

AI Technical Summary

Problems solved by technology

[0004] In the existing technology, if the electronic certificate, electronic signature and digital signature relied on by the real estate electronic certificate production are three independent application service programs, how to solve the identity mutual authentication between the business system and the electronic certificate and electronic signature As well as the integrity and validity of certificate documents, the general practice is to use the combination of service authorization and digital signature technology to realize the identity authentication and service authority control of the calling system through service authorization. Signature, by comparing and verifying the digital signature with the original file, it is judged whether the certificate file has been tampered with. This kind of practice can only guarantee the legality of the call for the certificate making service and the integrity and authenticity of the certificate file before signing. According to the OFD document Features, after the signature, the certificate adds Signs area data, and the content of the document changes, so it is impossible to judge the consistency of the document photo data before and after the signature and whether the signature behavior is genuine from the certificate business system through the self-verification of the certificate document after the signature entrust

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