Design And Implementation Of CPK Electronic Signature Based On Mobile Terminals

With the rapid development of e-commerce and e-government,electronic document security issues also attracted more and more attention.Electronic signature technology emerges,through digital signatures and signature image combination to ensure the integrity and signer non-repudiation of electronic documents.Currently,desktop software is still main in the electronic signature system,people are limited by the office location and private networks,resulting low efficiency in handling business.Therefore,we designed a mobile terminal electronic signature system based on CPK,to meet the needs of security on mobile workforce.Firstly,we did some analysis and research on the existing electronic signature systems,summed up some shortcomings and deficiencies existing in the current systems.The current mainstream electronic signature system uses PKI technology which uses certification authority CA as the core.It has high construction and maintenance costs,lower operating efficiency and other issues after the customer base expands.In this paper,a combination of CPK public key technology designed an electronic signature system which involved in the use of CPK TF card chip-level digital signatures and authentication,without CA and online databases,greatly enhancing the operational efficiency and reduce costs.Based on the in-depth study of the basic principles of CPK in electronic signature technology systems and other related technology,design and implement an electronic signature system for mobile terminals.The system's user platform is designed with an electronic signature client and embedded terminal.The electronic signature client is responsible for document processing,signature production,sealing and other operations interactive.The embedded terminal is connected with the electronic signature client,associated with CPK signatures,encryption,storage and other functions.Data between the two terminals is transferred via Bluetooth module.During the secure transmission of electronic documents,we designed a digital signature algorithm combining digital,digital signature and digital envelopes,so that electronic documents can only be specified recipients to view,which improves the safety performance of the document.Through detailed planning and design,this paper initially achieved the CPK electronic signature system based on mobile terminals,achieved the expectations of the subject and made some future improvements.