【正文】 ently enable the information which in the card saves to achieve the good encryption performance. (3) strict software encryption way: Brings the CPU intelligence IC card through the choice, in the use card the CPU operational capability and the monitor routine, the international general each kind of encryption algorithm (for example DES, RSA and so on) will apply in card encryption processing, will enable the IC card the safety performance to achieve the quite high level. intellectualized processing and the resolution capability Light discusses is the magcard, the light card or the bar code card, all is the nonintelligent passive operating mode. But intelligence IC card, not only can on own initiative send out the order request to the interface equipment, the distinction interface equipment validity, as well as discrimination interface equipment function and jurisdiction, 無 錫 職 業(yè) 技 術 學 院 畢業(yè)設計說明書（英文翻譯） 4 moreover has the voluntarily operation and handling ability. each kind of patible function the IC card itself substrate contour conforms to the international standard ID1 size, also the Khaki material is same in the magcard, therefore, attaches on the magcard or the additional painting bar code on the IC card substrate, may satisfy the magcard application and the bar code card application. good prehensive cost benefit at present, the IC card average monolithic cost is approximately more expensive than the magcard 3~5 times. But the prehensive IC card system prehensive cost benefit, not difficult to see it to have the strong petitive ability. In summary, IC card this newborn product pares with other Khaki product, has the unquestionable technical superiority. Along with the technical development, this kind of superiority further will also develop and the expansion. Therefore in the next Khaki product application, will substitute for other cards with the IC card to bee the next development the main characteristic and the inevitable trend. card system hardware choice took the application system the hardware equipment choice, must need as well as the implementation main body ability according to the actual project considers its system hardware disposition. This mainly involves: IC card choice and construction of data design。 IC card readwrite machines and tools choice and design。 System data transmission mode and structure choice and so on.. choice Card choice mainly chooses based on the IC card use environment request and the operating mode request. The belt joint receives an electric shock the extremely contact IC card and noncontacts the electrode the noncontact IC card is two kind of main cards Regarding request fast through with environment bad (for example multidust, rain water, darkness and so on) the situation, may choose the noncontact IC card generally. If altogether male automobile charge, highway bridge charge, automatic general entrance guard control and so on. Noncontact IC card effective range。 Reads the data to be possible to reach the data to be away from is generally 100~ with typical is the radio frequency cards (RF Card). It is one kind of passive IC card, its contour size and the contact IC card is same. It is carries on the correspondence using the radio frequency way and the interface equipment. Its effective range and the interface equipment receive/transmits the antenna to concern. 無 錫 職 業(yè) 技 術 學 院 畢業(yè)設計說明書（英文翻譯） 5 The basic corresponding relations are the range coverage and the antenna area is proportional. Noncontact IC card product variety not very many, Table 1 is several kind of noncontact IC card some performance. The noncontact IC card average transaction time is approximately ~. IC card data storage and processing pattern choice Counting IC card: The merit lies in the card cost to be opposite in other type IC card says its price to be low, moreover this kind is low to the card machine request. Suits in the disposable expense, but also may enhances card itself using card surface fine printing and the advertisements propaganda the collection value and other additional value, thus may one step reduce the IC card and the system cost, saves the investment. Memory stick or logical encryption memory stick: Is suitable or needs the application in the accumulation documents recording which wide range printing revises. Specially: The variety are many, easy to choose the performance price scaled height of burst the card, the control operation is simple, is low to the card machine request and the development system request. May duplicate many times use. Brings the CPU IC card: Is suitable or guarantees the density request high in the multistage document management the application IC card capacity choice Commonly used belt CPU the IC card storage capacity is: ROM memory capacity generally in 4k~16k byte。 RAM memory capacity generally between 128~512 bytes。 EEPROM memory capacity generally between 1k~8k byte Generally speaking EEPROM memory capacity size changes to card price height big. Moreover should pay attention: When choice card storage capacity, must as far as possible to the information which needs to save carry on optimized screening, uses each encoding method or the code pression technology es on the transaction card the record. These both may save the card the storage space, and may increase the card the secrecy, thus causes the chip the performance price pared to high. IC card secure request and choice If saves in the IC card chip the data or the documents material belongs to openness application, does not need to worry other people interpolation or the duplication, and selects the memory stick generally. Not only this because the price is cheap, moreover the card capacity