Name：CPU card
Model：005
Product Features：
CPU card from the appearance of speaking and general IC card, RF card is no difference, but there is a huge boost, safety, and general IC card than on performance, increase a lot, usually contains a random number generator, hardware DES within the CPU card, 3DES the encryption algorithm, i.e., on-chip with the operating system OS, also known as COS, can achieve the level of security of financial level.
Description
First, COS is a dedicated system instead of a generic system. That is: one generally only applies to a particular COS some (or some) smart cards, COS different card is generally not the same. Because coS are generally based on the characteristics and scope of application of a smart card and a specific design and development, even though they are actually completed in most of the functions may have followed the same international standards.
Secondly, the common computer operating system on those comparison, COS closer monitoring program, in essence, not a usual operating system called the true sense, at least for now it seems that is still the case. Because at this stage, COS to be solved mainly on how to deal with external commands, issue a response, which generally does not involve sharing, concurrency management and treatment, and on the application of smart cards in the current case, concurrency and shared work is indeed required.
The basic principles and main functions of COS
COS in the design are generally in close connection with the case of the smart card memory partition, to design, develop some of the features in accordance with the international standard (ISO / IEC 7816 series of standards) as stipulated. However, due to the current rate of development of smart cards quickly, while the international standard-setting cycle is relatively longer, resulting in the current international standard smart card is not yet perfect, accordingly, many manufacturers also have each developed their own COS for some expansion. For now, no one‘s COS product can form an industry standard. So here mainly with the existing (ie before 1994) international standard, focuses on the basic principles and the basic functions of the COS, in which they are properly cited implementations in some products as an example.
COS main function is to control the smart card and external information exchange, management memory smart card and complete the deal within the various commands in the card inside. Among them, the exchange of information with the outside world is COS basic requirement. In the exchange process, COS followed by information exchange agreements currently includes two categories: asynchronous character transmission protocol T = 0 and asynchronous packet transmission protocol T = l. Specific content and implementation mechanisms of these two information exchange protocols are specified in ISO / IEC7816-3 and ISO / IEC7816-3A3 standards; and COS groups should complete function management and control is in the ISO / IEC7816- to provide for 4 standard. In this International Standard, but also on the smart card and the data structure of the basic command set COS make a more detailed explanation.
As ISO / IEC7816-1 and 2, it is the physical parameters of smart cards, dimensions makes provision, their relationship with the COS is not very close.
