The Research On Information Network Security System Of Regional Agricultural Resource

The application of Internet has brought the revolutionary changes to enterprises, and improved the working efficiency and reaction ability of the market greatly,which make enterprises more competitive. But at the meantime, the problem of information safety are outstanding day by day.With the development of society and agriculture information day by day, Whether agriculture's information online security or not is a key factor of agriculture's information construction success, it is the important foundation stone of agriculture's information construction sustainable development. Most safe problems which neglected at the beginning of setting up of agriculture computer network that our country is existing,which have made considering being safe, and only set up the safe mechanism on the safe mechanism of physics too. What better strengthening the safety of agriculture's information, which need to carry on research to the region land information online security urgently.This paper analyses the demands of information safety of Region agricultural, and summarizes the security threats and main safety problems of the Internet. Then aiming at the security threats summed up, we do analyse to some kinds of safety technology, such as:Encryption, Identity Authentication, Virtual Private Network, Firewall, Intrusion Detection technology.From the regional agricultural information network security, the agricultural information network network model,the basic principle,password-based network security technology strategy, building a Chaling County Regional Agricultural Information overall network security strategy.We use security key technology in application system:(1)User's identity authentication based-on the PKI digital certificate, which guarantees the identity legitimacy of both sides of communication; (2)Log-in security mechanism, which defines authority according to the role, and adopts authority assign form and dynamic user's interface two methods synthetically to assign user's authority rationaaly; Adopt more advanced one-off log-in system, for which user just need to input the password once, the system can discern users' rank of security automatically. Thus permit the user to enter corresponding application level. Additionally, the application program is the direct user of the database, which guarantees the security of system maximum; (3) We use the MD5 algorithm to encrypt user's password, and propose improvement of the MD5 algorithm's application——MD5--1,after analysing the weakness of MD5 algorithm, which realize the dynamic encryption of the password, and enhance the security of the algorithm encrypt.We should apply many kinds of safety methods synthetically to ensure security of Internet, and guarantee security to the Region agriculture information of chaling Transportation Logistics networked on the Internet.