The Business Side Of The Tax Control System Design And Implementation "

Among the difficulties that restrict the process of information development, the problem of the faithfulness and effectiveness in the tax data is the one that confuses us all the time. How to realize a tax-controlled device by means of applying the technology of information network and safety products is a brand new subject raised by our times.The concept of the thesis is constructed on the development of tax-controlled cash collector system, one of the projects of ShengJi Information & System Project Ltd. affiliated to Shanghai Institute of Computing Technology. The project was initiated by the Municipal Tax Bureau and is expected to be the technologic basis on which the managerial system of tax-controlled cash collector under the catalogue of Shanghai Municipal Tax is implemented. Part of the project is directly applied in the fields of real estates, construction and upholstery.The whole system consists of the tax server terminal and the end user. The thesis gives a detailed account of the realization of the end user. At the beginning of the thesis, I make an introduction of the hardware basis realized by the connection to the end user, with a relatively detailed account of tax-controlled black box and tax-controlled IC card. The main part of the thesis is concerned with the realization of the software connected to the end user. Starting from the designing of software stratification, I firstly introduce the idea of designing the strata of file management and how to realize this idea. Then I elaborate in detail the realization of transactional atom operation and the user operation layer, the interface and communication between the realization of different strata (flowing diagrams and framing designs have been given to some crucial operations) and the means of realizing the data safety between these different strata.The key technology of the whole system is the safety technology, including data concealing, data safety, program and equipment safety, technological process safety and anti-attack treatment, to name just a few. Technologically, the coordination of tax-controlled IC card and tax-controlled black box contributes a lot to the realization of data safety, so as to achieve the goal of tax control.The system was authenticated as feasible by Shanghai Municipal Science Commission and CA Center in October 2002. In January 2003 it was checked and accepted by the group of experts in Shanghai Tax Bureau. At the same time the system of real estates invoices is exemplified by Shanghai Tax Bureau as the criterion of the city of Shanghai.