Design of Smart Lock Control System with Function of Active Authentication

The smart lock control device has functions of active wireless authentication and GSM remote unlocking. A smart key can match with 8 locks. A smart lock can have 8 keys. When the intelligent lock receives unlocking request, it will send an encrypted authentication request packet on its own initiative. After receiving request packet, the key checks the correctness of lock ID, determines the corresponding PD(password dictionary), obtains the password by PI(dynamic password index), and deciphers the message. Secondly, the key compares lock address with the source address to determine whether to transmit a reply packet. The lock adopts the same way to judge legitimacy of the key. Moreover, it adds lock ID and overtime certification. After identity authentication, the control system performs unlocking operation. Mobile phone can achieve remote unlocking by using dynamic authentication codes. Verified by experimental tests and application, the system can meet the design requirements in function and security.