How to design and implement electronic code lock based on RFID technology

5.3 Anti-collision of electronic code locks

RF cards have a fast anti-collision mechanism that prevents data interference between cards. Therefore, the electronic lock reader can read the card information of multiple non-contact RF cards "simultaneously", but only one of the non-contact RF cards is actually read. The contact radio frequency card prompts the user to enter the corresponding password by displaying the card information of the contactless radio frequency card being processed on the LCD screen, which solves the problem of inconsistency between multiple contactless radio frequency cards and passwords.

5.4 System security

Encryption of IC card information is the key to determining the security of IC cards. Since this system uses the Mifare card of PHILIPS, it is a smart card with a built-in central microprocessor (MCU) and ASIC, which allows the card to perform micro-operation controls such as security and confidentiality, authentication logic, and arithmetic operations. Orderly. To access data on a Mifare card, authentication must be completed first. Mifare card authentication uses a three-step authentication process, which can be achieved by automatically executing the Authbent1 and Authbent2 commands. By adopting this method, illegal copying and data modification of IC cards can be effectively prevented. During the system implementation process, the security of the electronic password lock system was truly realized by combining the contactless IC card with the input of user passwords and keeping log records.

6.Conclusion

The system uses the high-performance control chip STC89C58RD+ and combines it with mature radio frequency identification technology to analyze the hardware composition and software design of the non-contact IC card electronic code lock, and proposes a non-contact IC card electronic code lock based on radio frequency identification technology. System solutions. The design of this system embodies the design concept of convenient, safe, reliable and efficient electronic lock system. The system functions can be expanded and suitable for various places such as residential areas, shopping malls, office buildings and schools. Practice shows that the system operates stably and has good real-time performance.