摘要
Abstract
Firstly, the current popular digital signature algorithm is analyzed, we mainly introduced MD5 and RSA, we discuss how to make good use of the advantage of both method, how to avoid a series of problems due to the disadvantages of both, and how to add some control factors in order to strengthen the data transmission security in the online office system; secondly, we discuss the realization and application of digital signature in electronic document, we make use of the strict responsive protocol between the receiver and sender to overcome the disadvantages of simplex digital signature, introduce how to make good use of the advantages of both and combine scientific encapsulation system, realize online safe transmission of including digital signature by transmission protocol, and offer an effective authentication system; thirdly,we introduced the software scheme of electronic official seal in document transmission. Through the read-write analysis of BMP data bit, and combining the document transmission characteristic and MD5 encryption algorithm, electronic document stamping is realized by user. Through the research and analysis to the on-line office system, a safe scheme of document transmission is established. Combining a series of online work methods, such as document examination and approval, application etc., utilizing the above disscused safe mechanism, a on-line office system is completed based on the data encryption technique.Finally, the registration encryption technique of the online office system source files is discussed.Bottom level protection to the source files is realized. In this way, the security problems resulting from the explanation of program file is avoided.关键词
数字签名/电子公章/RSA算法/MD5算法/网上办公/BMP图像Key words
digital signature/electronic official seal/RSA algorithm/MD5 algorithm office anywhare/BMP分类
信息技术与安全科学
