Safety module, data reading-writing system for parking lot and safety setting method

Abstract

The invention discloses a safety module, a data reading-writing system for a parking lot and a safety setting method. The safety module comprises a transceiver unit, an encryption unit and a timing unit, wherein the transceiver unit is used for data and instruction interaction with a reader-writer unit; the encryption unit in which keys are stored is used for calling the keys to encrypt to-be-encrypted data from the reader-writer unit and returning the encrypted data through the transceiver unit; the timing unit comprises a time setter and an RTC (real-time clock) timer; the time setter is connected with the transceiver unit and used for setting current time according to a time setting instruction including current time information; the RTC timer is used for synchronous RTC timing according to the current time; the encryption unit is also used for returning key calling time generated by timing of the RTC timer when the encrypted data is returned. By setting the current time and performing synchronous RTC timing, a time recording function is added, the safety and reliability of the safety module during data transmission can be effectively enhanced, and artificial tampering is avoided.

Description

technical field [0001] The present invention relates to the field of intelligent safety management, for example in the field of intelligent transportation, and specifically relates to a safety module, a safety setting method of the safety module, a data reading and writing system for a parking lot, and a safety setting method for the data reading and writing system for a parking lot. Background technique [0002] A security module refers to a module used to implement security authentication in an electronic product or system, such as a PSAM card, ESAM card, SIM card, etc. In particular, PSAM (Purchase Secure Access Module, terminal security module) is widely used in commercial POS machines, outlet terminals, direct-connection terminals and other equipment. It has security control and management functions and is suitable for various application environments. [0003] For example, the parking lots currently used in government agencies, shopping malls, office buildings, residen...

AI Technical Summary

Problems solved by technology

However, once the PSAM card is certified, the PSAM card can be used all the time, or it will not be used after it is stopped. At this time, the manager does not know the status of the PSAM card. It is not clear whether it is in use or not.

[0008] In the existing technology, the security module can only do ordinary encryption and decryption calculations, and the time is obtained through an external clock, which may provide opportunities for attackers

Images