Hacked Gadgets Forum

January 21, 2007

SecureLED – Better Access Control

at 12:52 pm. Filed under Complex Hacks, Cool Gadgets, Electronic Hacks

Now that lock bumping is gaining in popularity, this is looking like a nice option to me.

“OVERVIEW

SecureLED is an optical access control device which replaces current RFID or Magnetic Strip technologies with a cryptographically secure, contact-less device which communicates over commodity Light Emitting Diodes (LEDs).

PROJECT SUMMARY

This project started with one central premise: current physical access control systems are insecure in fundamental ways. We sought a way to remedy this problem, and came accross recent work which demonstrated the potential of communicating over cheap commodity LEDs. We used these as the basis of our system, building on top of it devices which use a cryptographically secure challenge-response protocol to authenciate a user.

As such, we built both a reader and a small key device (which we had originally planned to implement on an ATTiny2313, but did not for reasons listed below). The reader outputs the industry-standard Weigand protocol, so it is interoperable with current systems. All in all, we believe that this solution presents a powerful alternative to current technology. ”