Tamper proof zip tie security hood
by driggers, published
Alice's package can be closed with a zip tie, so I have made her a little accessory that prevents Eve from opening the zip tie (with a pin, for example), and closing it again. Even if Eve were to cut the zip tie, she would not be able to remove it from the the tamper proof hood.
Eve has one option remaining: Cut the tamper proof seal and replace it with her own forgery. But Alice prints them on her 3D printer, and adds a customized mark, wich will take Eve a long time to reproduce. In addition, Alice has etched a pattern into the zip tie itself, and photographed it. It would be nearly impossible for Eve to reproduce this exactly.
Do you think you could foil the security of this tamper proof seal? Tell us your trick in the comments!
This thing was made with Tinkercad. Edit it online tinkercad.com/things/fRa3fW1P8VF
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You could add an SD card to the hood that contains aÂ digitally signedÂ manifest of what's beyond the zip tie (text, photos, video). That way, the hood is the first line of defense, but assuming it's intact Bob can first validate the manifest, and then use the manifest to validate the physical package.
Although, if you wanted to beef up the hood you could water-mark the insides of the walls via cavities. (hopefully only visible against a bright light)
Hmm, there's also got to be a way to take advantage of the ability to print unique changes per hood...
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