Designs and Implements the electronic Signature System of Open Fixed-layout Document (OFD) format documents

With the rapid development of document security and authenticity requirements in office automation, the demand for electronic signature is more strict, and it needs to realize the functions of multi-party countersignature, signature verifiability, authentication, non-repudiation and so on. Therefore, the electronic signature system of a new generation of electronic signature products based on OFD format files comes into being. This paper focuses on realizing the function of OFD format documents in the electronic signature module, adopts MVC design pattern, uses the state secret algorithm, builds the electronic signature system architecture of OFD format files based on Spring MVC framework, and completes the key query of OFD format files, the technical difficulties such as the display of the seal and slit, and supports single-page seal and multi-page seal. A variety of signature rules, such as seal, keyword seal, transparent seal and so on, support the nested call of signature rules, flexible design and convenient integration, which is of great significance for the promotion and application of national format document OFD and the realization of the core technology of domestic electronic document system localization.