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Tamper mesh PCB design

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  • Tamper mesh PCB design

    Hi

    Any thoughts/ideas about how to best tackle the issue of designing a tamper mesh PCB? Any requirements? I know it would use a thin-film material but can't find specific requirements on routing and the layout.

    Regards

  • #2
    What do you mean by "tamper mesh PCB"?

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    • #3
      It's a thin film PCB built specifically for external tamper protection. Basically it's a way on informing the secure module inside the CPU that a tamper attack has happened. Followed by a tamper response (whatever it might be).

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      • #4
        I have never done that. I am interested to know more if someone has more information.

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        • #5
          here's a good description of how tamper mesh works in a chip,
          https://www.youtube.com/watch?v=62DGIUpscnY

          same concept applies to PCB - basically it's a web of traces surrounding the real traces in every dimension - The web is made in such a way that you can detect a break, perhaps a break with a bypass, or perhaps even a change in some characteristic, thereby letting the circuit know that some tampering or attempts to circumvent the intended operation of the circuit is occuring. I'm not a big fan of this, and since I have seen it broken many times - I question it's effectiveness. You might find this sort of thing on secure entry id card readers or payment card scanners and perhaps also on some satellite TV decoders.

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          • #6
            here's a good description of how tamper mesh works in a chip,
            https://www.youtube.com/watch?v=62DGIUpscnY
            Interesting video

            anovickis thanks

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