The Research And Implementation Of Electrical Seal System Based On Digital Signature

Along with the deep application of the computer network and information technology in so many fields in society, the OA (Office Automation) is going to be used at the government in a few days. How to guarantee the legitimacy, unique, traceablity and avoiding being illegal copied of the electronics official document is a difficult problem, which is necessary in our socity. Digital seal technology is brought forward in this background, and it is a hot and difficult point to be reaserched.Though rapidly rising electronical government affair puts forward highly requitement of security of the electronical official document, the technologies and theories of digital seal system which can meet the security necessary have not been solved yet.Assuring the integrality of the electronical document and the non-repudiation of the signer is a kernel security problem, which must be sloved in digital seal system, and is a base of application. Aiming at the problems, the paper firstly compares with the effect of the digital seal and the traditional seal, draws out that the traditional seal's law effect in the electronic information system may be replaced by the digital seal. After analyzing the current civil and foreign technology, we bring out the "Digital Signature Seal" system model and common digital seal system's implementation scheme, analyze the key technologies, such as: hash, digtal signature etc, which will be used in digital seal system. Afterward, the paper puts forward a example of digital seal system implemented on the MS-Wbrd application. Finally, we evaluate the digital seal system and point out some potential directions of research.