| 摘要 |
<p>An electronic security system includes an electronic lock mechanism (104) and an electronic key (101), each of which is provided with a microprocessor controller and a memory storing data including an ID code and encryption key codes. The lock microprocessor may either change ID codes stored in it's memory or encrypt a seed number to be used for determining access to the lock. The key can only be used to access the lock either once or for a limited number of successible times, and must thereafter be reprogrammed by a host computer (301) to be loaded with either the proper ID code or the appropriate encryption key code for that lock. The electronic lock operates a solenoid (1624) which retracts a bolt-blocking mechanism that prevents the unlocking of the bolt even when a key having the correct mechanical key cuts is inserted into the lock. Power for operating the electronic lock as well as the solenoid is provided by a power supply within the key. In a preferred embodiment the key unit is composed of a handheld computer witha separate internal circuit board which stores key code information and performs encryption/decryption functions. A novel electronic T-lock (1340) assembly is also provided for use with vending machines and the like.</p> |
