Pneumatic Cylinders Co., Ltd. , http://www.86pneumatic.com
As an important part of this system, prepaid time-sharing energy meter has good safety performance in terms of card security, safety of meter production process and safety of operation management.
(1) Card security
The prepaid time-sharing energy meter has a large user group. After the meter is installed, the data is exchanged through the IC card, and the management system cannot monitor in real time. Therefore, the user card must be required to have high security. Therefore, the prepaid time-sharing meter should use a CPU card with key control. The CPU card must undergo key authentication when reading and writing data. Since the key is unreadable and cannot be intercepted in actual operation, the CPU card has a very high security compared to other types of IC cards. Sex. During the issuance process of the card, the keys in the user card are distributed to minimize the possibility of being hacked to decipher the system key, and the key data transmitted in the user card is encrypted and protected to prevent illegality. The possibility of tampering with the data.
(2) Safety of meter production and operation process
The ESAM security authentication module is installed in the card table. ESAM (Embedded Secure Access Module) embedded security control module uses off-the-shelf products (such as the CPU card operating system COS--- into the same type of chip with package, this COS system and card COS system have individual differences), It has a complete security mechanism, a standard encryption algorithm, and can generate subkeys according to the dispersion factor. ESAM's special security attributes allow it to be embedded in any other smart device with security requirements, such as secure storage of files, digital signatures, data encryption and decryption, two-way identity authentication, internal decentralized keys, e-wallets, communication line protection, etc. Kind of function.
(3) Security of operation management
In the prepaid time-sharing sales management system, there is a special key management system and a power sales management system, and the two systems operate independently. The key management system is controlled by the energy meter operation management department. The power sales management system is controlled by the key management system. Each subsystem completes its daily work according to its own functions and permissions. The system operation data is managed by the central computer dedicated database. Cards used with energy meters can only accept cards issued by a particular key management system.
Sida Instrument Prepaid Time-sharing Energy Meter Successfully Developed
Recently, Star Instruments introduced a new product, the prepaid time-sharing energy meter. The prepaid time-sharing electric energy meter is an active energy metering instrument with time-sharing charging with an IC card communication interface, and can complete the electric energy according to the agreed power consumption and unit price, prepaid amount or pre-purchased electricity payment mode of different charging periods. Metering, data processing, and user power control. The prepaid time-sharing electric energy meter and the pre-paid electricity sales management system, as special metering products for energy metering and electricity settlement, should ensure that the meter and the system are extremely safe under all circumstances. Including accurate and stable metering functions, strong anti-electromagnetic interference, anti-attack, and harsh environment resistance, as well as high security in data decryption and exchange process, ensuring reliable use of electricity information and settlement methods, ensuring electricity consumption, The interests of both parties to the power supply are not impaired.