Research On The Technology Of Electronic Signature Based On Combination Public Key

In recent years, China’s e-government and e-commerce has made considerable progress. The applications of Electronic document are gradually expanding. Electronic signature is composed of electronic signatures and signature images. Most existing signature system is based on the PKI architecture, and there are some inherent shortcomings of such systems, such as investment costs are relatively high, the level of trust caused by CA agencies degradation. CPK is based on a new key management algorithm and mapping techniques based on cryptography, CPK does not require a huge support system, almost no maintenance.This paper adopts CPK to design electronic signature system using ID certificate to digitally sign and verification. It simplifies key exchange protocol, and improves the efficiency of the system verification. No longer need the involvement of trusted third party. Using single CA model, to increase trust, and reduce costs. It ensures the documents integrated, confidential and undeniable, to realize the high efficiency safe electronic signature system.Based on the existing e-signature system analysis and research, concluded existing applications or security flaws. According to the functional requirements for electronic signature system, research and design a combination of public key system based on CPK in the system. During the transmission of encrypted information, using digital digests digital signatures and digital envelopes combination, to make those electronic documents can only be made to view a specific recipient, to improve the safety performance of the document. Electronic signature system is realized, which contains a certificate management subsystem, and signature management subsystem, and the client of signature. Finally, through the comparison of CPK and PKI technology, describes the advantages of combined public key in the performance and safety.