Comments on: Security Lock Uses Any USB Device Unique Serial Number for Identification http://www.gizmodo.com.au/2008/10/security_lock_uses_any_usb_device_unique_serial_number_for_identification-2/ the Gadget Guide | Technology and consumer electronics news and reviews Wed, 25 Nov 2009 05:03:49 +1100 http://wordpress.org/?v=2.8.6 hourly 1 By: Ledfoot http://www.gizmodo.com.au/2008/10/security_lock_uses_any_usb_device_unique_serial_number_for_identification-2/comment-page-1/#comment-12052 Ledfoot Thu, 23 Oct 2008 03:16:09 +0000 http://www.gizmodo.com.au/2008/10/security_lock_uses_any_usb_device_unique_serial_number_for_identification-2.html#comment-12052 <p>Not very good for brute force attacks. I would look for a system that forces a challenge response. That is:<br /> 1) Key is taught to the system (Key Serial number is remembered by lock and key gets a unique encrypted seed number that uniquely ids lock)<br /> 2) when key is placed in lock a random number is sent to the key andit uses its own ID and the seed number to generate a response. The response then matches the one that is expected by the lock.</p> <p>Thats the way car manufacturers do this with their remote keyless entry and also the rfid chip embedded in the ingnition key.</p> Not very good for brute force attacks. I would look for a system that forces a challenge response. That is:
1) Key is taught to the system (Key Serial number is remembered by lock and key gets a unique encrypted seed number that uniquely ids lock)
2) when key is placed in lock a random number is sent to the key andit uses its own ID and the seed number to generate a response. The response then matches the one that is expected by the lock.

Thats the way car manufacturers do this with their remote keyless entry and also the rfid chip embedded in the ingnition key.

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