cpu card is a type of smart card; CPU card is also called smart card. The integrated circuit in the card contains microprocessor CPU, storage unit and chip operating system COS; the CPU card equipped with COS is equivalent to a micro Computers not only have data storage functions, but also have command processing and data security protection functions.
#The operating environment of this tutorial: Windows 10 system, Dell G3 computer.
What type of card is the cpu card?
Another name for smart card.
CPU card chip, in layman’s terms, means that the chip contains a microprocessor, and its function is equivalent to a microcomputer. The metal piece on the integrated circuit card (IC card) that people often use is the CPU card chip.
CPU card: Also called a smart card, the integrated circuit in the card contains a microprocessor CPU, storage unit (including random access memory RAM, program memory ROM (FLASH), user data memory EEPROM) and chip operating system COS. The CPU card equipped with COS is equivalent to a microcomputer, which not only has the function of data storage, but also has functions such as command processing and data security protection.
Due to the failure to master the key production processes, it turns out that the CPU card chips designed in our country have been produced abroad. At present, the capacity of CPU cards independently designed and manufactured in my country has reached 128K.
The CPU card can be used in many fields such as finance, insurance, traffic police, and government industries. It has the characteristics of large user space, fast reading speed, and supports multiple uses of one card. It has been approved by the People's Bank of China and the National Commercial Bank of China. Certification from the Secret Committee.
IC CARD
To understand what a CPU card is, we must start with the IC card.
IC card is the abbreviation of Integrated Circuit Card. It is a plastic card inlaid with integrated circuit chips. Its shape and size comply with international standards (ISO). Chips generally use non-volatile memory (ROM, EEPROM), protection logic circuits, and even microprocessor CPUs.
The IC card with CPU is the real smart card. According to the form of embedded integrated circuit chip and different chip types, IC cards can be roughly divided into contact, non-contact, and dual-interface cards.
Classification
CPU cards are both contact and non-contact. (See Figure 1)
Figure 1: IC card classification
Non-encrypted memory card: The integrated circuit chip in the card is mainly EEPROM, with data storage function, does not have data processing functions and hardware encryption functions.
Logical encryption memory card: An encryption logic circuit is added on the basis of the non-encryption memory card. The encryption logic circuit protects the data in the card by verifying the password to see whether it is open to external access, but it is only at a low level. Security protection cannot prevent malicious attacks.
For more related knowledge, please visit theFAQcolumn!
The above is the detailed content of What type of card is the cpu card?. For more information, please follow other related articles on the PHP Chinese website!