Research And Application Of Electronic Postage

E-Postage(Electronic Postage) is a kind of service on Internet provided by post: Users buy postage from post department through Internet, and print out electronic stamps at local area which is admitted by post and can be used as ordinary stamps. E-Postage is a new postal service come into being with the combination by traditional post with Internet. The research and development of E-Postage system, not only can improve the service manner and quality of post, strengthen the management of postage income, but also can accelerate the information reform of post.The paper first studies and discusses offline-consuming service mode and online-consuming mode of E-Postage system ,then focuses on the study of offline-consuming E-Postage system and establishes multiple level and distributed architecture of E-Postage system, which is secure, practicable and well-scalable. On the base of this architecture, key techniques to realize E-Postage system are studied, which include the design of postage-storage and stamp ^ secure postage renewing transaction and the foundation of secure background system.Postage-storage is used to store and protect postage users buy and download to local area, its security is the basis of the whole system. The paper studies and chooses iKey as the medium to store postage, founds the secure cryptographic system by using CryptoAPI technique, then gives a scheme of postage-storage, analyzes the security and practicability of the scheme.Postage renewing is a process that postal users buy postage at the E-Postage website and download and store postage into postage-storage. The process is divided into two parts as user identity authentication and secure transaction according to business disposal logic. The paper designs out challenge/response identity authentication technique based on the MD5-Hash function of iKey, which is secure and easy to carry out; designs out secure postage renew transaction at the basis of cryptography; then gives out a solution for the realization of postage renewing on the WEB by using ASP and COM.Electronic stamp is the final embodiment of E-Postage service, the security of stamp is key guarantee for the E-Postage system. The paper designs out anti-discriminate and anti-reuse stamp by the application of two-dimensional Bar Code and cryptographic anti-discriminate technique ,which is machine readable and satisfied for automatic selection of mails.The security of background system is the guarantee for the whole information system. By Building operating log to supervise and restrict the behaviors of system operators and studying privilege authorization and management of E-Postage system based on the theory of RBAC, secure background system of E-Postage isfounded.