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[通信技术]smart card 9

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gun 发表于 2005/1/14 17:34:32

In the last two decades a number of Smartcard standards and specifications have been defined to cohesion between cards, IFDs and card applications by different vendors. The most significant ones are: ISO 7816 standards: ISO 7816 "Identification cards—Integrated circuit cards with contacts," publ

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[通信技术]smart card 8

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gun 发表于 2005/1/14 17:33:00

A New Breed of Operating Systems The commonly used smart card operating system supports a file system as specified in ISO 7816-4. Although the may pose a little resemblance to the commonly employed operating systems such as windows, UNIX etc. APDUs, which are specified under ISO 7816-4 a

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[通信技术]smart card 7

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gun 发表于 2005/1/14 17:31:49

Transmission Protocol Data Units (TPDUs): these protocols are used for the transmission of APDUs and the data structure that is exchanged by the host and a card suing the transport protocol are called as TPDUs. Mainly two types of protocols are in common use for this purpose: T = 0: the smallest unit processed and transmitted by the protocol is single byte, in other words it is byte oriented. T = 1: this consists of sequence of bytes, in other

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[通信技术]smart card 6

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gun 发表于 2005/1/14 17:30:35

The APDU is an application level protocol as specified in the ISO 7816-4, which takes place between a smart card and a host application for the communication purpose. APDU consist of two structures, as defined below: Command APDU (C-APDU: this command is used by the host application to send command to the card. Header: it consist of 4 bytes:- Class of instruction (CLA) Instruction code (INS) Parameters: P1 and 2

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[通信技术]smart card 5

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gun 发表于 2005/1/14 17:28:53

The smart card communicates with outside world with the help of a reader and terminal. The reader is a card accepting device, which consist of a slot into which card may be placed. The reader provides power and establishes a path through which it can communicate with the terminal or host 删除

[通信技术]smart card 4

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gun 发表于 2005/1/14 17:28:24

So the chip contains CPU but it’ll need to have some memory if at all it wants to process something and do some computations. Well, the primary use of the IC card had been for the portable storage and retrieval of data but now they provide very advanced security features like storing private keys and certificates for authenticating users to some external system, for example a secure website. Hence another fundamental component of the IC is a 删除

[通信技术]smart card 3

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gun 发表于 2005/1/14 17:26:34

The ICC itself The ICC cards usually employ a low power micro-controller like Intel® 8051 or AVRs from ATMEL® as the

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[通信技术]smart card 2

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gun 发表于 2005/1/14 17:24:36

Is a "smart card" the same plastic card that I use at the ATM? No, probably not. The ATM cards are just plastic cards with a magnetic stripe bearing some information. A Smart Card is really smart. You might ask why? The old ATM cards and other proprietary magnetic stripe cards do not provide security and do not h

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[通信技术]smart card 1

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gun 发表于 2005/1/14 17:22:22

copy from http://www.devshed.com/c/a/Practices/ 先把这个文章贴上来，大侠就不用看了，普及版的知识，有空我试着翻译一下。 In this article I’m going to present you with a quick overview of the Smart Cards and then move on to exploring the ways they can be integrated to existing services in order to provide value added services or a new range of secure application. "It’s a small world." It’s no more just a saying -- it is a reality today. Th

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[娱乐]周六下午的赈灾义赛

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gun 发表于 2005/1/14 14:07:28

这周六在大体举办的中国国家乒乓球队和羽毛球队的海啸赈灾义赛，奥运选手悉数出动，可是一听赈灾这个好多人就不去了，害怕要捐钱，其实谁能强迫你呀，再说这些赠票已经都是赞助企业买单了，捧个人场都不干，咳。个人建议：大家要是捐款的时候最好要求不用于印尼救灾，原因不言自明。

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