Integrated circuit (IC) card module security authentication method for intelligent water meter

Abstract

The invention discloses an integrated circuit (IC) card module security authentication method for an intelligent water meter. The water meter, a user card and a purchase secure access module (PSAM) card are involved. The authentication method comprises an authentication flow between the user card and the PSAM card and an authentication flow between the user card and the water meter. The authentication flow between the user card and the PSAM card comprises the following steps of: (1) performing corresponding operation on the user card through external authentication between the user card and the PSAM card; (2) checking a water purchase information file of the user card by using the water meter; and (3) performing information file rewriting operation on the user card by using the water meter after the authentication flow between the user card and the water meter succeeds. According to the security authentication method, the requirement of information security can be met by the intelligent water meter on the premise of no use of an embedded secure access module (ESAM) security chip, and the application cost of the intelligent water meter is also lowered.

Description

technical field [0001] The invention relates to a security authentication method, in particular to a security authentication method for an intelligent water meter, and belongs to the field of water meter information security. Background technique [0002] IC card is the abbreviation of Integrated Circuit Card. It is a plastic card embedded with integrated circuit chips. Its shape and size follow the international standard (ISO). Protection logic circuit, some with microprocessor CPU. This kind of card is usually divided into the following types: 1. Non-encrypted memory card: the integrated circuit chip in the card is mainly EEPROM, which has data storage function, but does not have data processing function and hardware encryption function; 2. Logical encryption memory card: On the basis of the non-encrypted memory card, an encryption logic circuit is added. The encryption logic circuit protects whether the data in the card is open to external access by verifying the passwor...

AI Technical Summary

Problems solved by technology

[0005] The difference between the two lies in: 1. In terms of use: CPU card is an IC card with a microprocessor chip, which can perform encryption operations and other operations, has a large storage capacity, and can be applied to different systems; memory card or logic encryption card It is a single memory card with a read-only memory inside, and its storage capacity is smaller than that of a CPU card, and it has no scalability in terms of use; 2. In terms of security: the logical encryption card is a storage IC card that prevents the information in the card from being rewritten at will. When operating the encryption card, you must first check the password in the card. Only when the check is correct and a series of correct response signals are sent out from the card, can the card be operated correctly. However, since only one authentication is performed, and there is no other security protection measures, it is easy to lead to the disclosure of passwords and the generation of fake cards, and the security performance is very low

[0006] At present, the existing CPU card smart water meters all adopt the security chip (ESAM) installed on the meter end to perform interactive authentication with the CPU card to ensure information security, but the result of this is that the cost increases a lot, and it is not easy to popularize and apply.

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