Based On The Confidentiality Of The B / S Mode Network System Security Design

The paper discusses the development of Web, Browser/Server mode conception and the content and mechanism of network security based on Web , and also describes the basic conception and system of cipher theory, symmetric-based Data Encryption Standard and Advanced Encryption Standard and asymmetric-based RSA. It presents a detailed design of Secrecy Net of digital government,and advances a DES-and-RSA-based security model of information exchange, which makes use of symmetric cryptographic algorithm to encrypt plaintext, and introduces public-key algorithm RSA to encrypt Session key to compose digital envelope and to realize digital signature.The system is basically credible by test. At present, it is being used in a digital government system .