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XlogicX

Presentation at phx2600 meeting

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I gave a presentation on some hardware obsfucation techniques this recent 2600 meeting in phoenix. It was nothing super 1337, but a few tricks I soldered on to a board in some spare time.

Trick 1: I put the components on a used board.

I had a spare power supply that I gutted for parts. So in turn, I had a blank PCB; with no components on it. This PCB was ready for some new components for an unrelated circuit.

Trick 2: I put way more components on the board than the "actual" circuit needed. So 70% of the electrical components were'nt even being used in the circuit.

Trick 3: I grinded down all of the pin-outs on the bottom of the board (with a dremel) I then re-flowed the solder so the "pin-out" was just a smooth bump. I then flowed all of the holes that didn't have pins coming out; so they looked identical to the actual pin-outs.

Trick 4: I clipped some "dud" pins and soldered them to the back of the board; there are pins coming out the bottom of the board where there are no actual components on the other side.

These are only a few of many tricks that could be used to obsfucate a circuit, but this is what I was able to do with the crap I had laying around. This is definately low budget obsfucation.

Here are some thumbnails of the circuit:

DSCN7109.JPG

DSCN7110.JPG

DSCN7111.JPG

DSCN7112.JPG

Larger pictures can be found on the March gallery of our 2600 site (I didn't want to plaster huge pictures on this thread, that's just pollution :P) :

March pictures

There is also a video of the presentation (so you can know what the circuit actually does, it's nothing I havn't built in one form or another though):

Video Clip

(thumbnail)

circuit.jpg

Edited by XlogicX
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You forgot sanding down the tops of IC's to eliminate the IC ID.

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you can always cover them in epoxy like the big guys....

I worry that a sanding could kill the IC.

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I didn't really use any IC's so that wasn't really a problem. Although, I could have peeled the labels off of the capacitors I guess, though the size of a capacitor is usually a little revealing (but not always).

As far as the IC label removing, a little bit of acetone can go a long way.

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