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A contactless smart card s a contactless 13.56-MHz credential whose dimensions are credit-card size. Its embedded integrated circuits can store and sometimes process data and communicate with a terminal via radio waves. There are two broad categories of contactless smart cards. Memory cards contain non-volatile memory storage components, and perhaps some specific security logic. Contactless smart cards do contain read-only RFID called CSN (Card Serial Number) or UID, and a re-writeable smart card microchip that can be transcribed via radio waves. == Overview == A contactless smart card is also characterized as follows: *Dimensions are normally credit card size. The ID-1 of ISO/IEC 7810 standard defines them as 85.60 × 53.98 × 0.76 mm (3.370 × 2.125 × 0.030 in).〔(ISO/IEC 7810:2003 ''Identification cards — Physical characteristics'' )〕 *Contains a security system which is different for every brand tamper-resistant properties (e.g. a secure cryptoprocessor, secure file system, human-readable features) and is capable of providing security services (e.g. confidentiality of information in the memory). *Asset managed by way of a various central administration systems, or applications, which receive or sometimes interchanges information and configuration settings with the card. The latter includes card hotlisting, updates for application data. *Card data is transferred via radio waves to the central administration system through card read write reader devices, such as access control mullion readers, ticket readers, ATMs, USB connected desktop readers or all devices embedding a contactless reader technology like printers, Time & attendance terminals, parking, lifts, point of sales, car sharing ... 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Contactless smart card」の詳細全文を読む スポンサード リンク
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