Power LED Attack - Computerphile
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Extracting a secret key by simply watching the flickering of an LED? Sounds implausible but that's what we're discussing with Dr Mike Pound!Author’s page on ...

Extracting a secret key by simply watching the flickering of an LED? Sounds implausible but that’s what we’re discussing with Dr Mike Pound!

Author’s page on the attack: Video-Based Cryptanalysis (nassiben.com) Paper: https://bit.ly/C_PowerLED

  • Meowoem@sh.itjust.worksEnglish
    51·
    1 year ago

    That’s actually painfully simple, crazy even a phone camera could do it and I expect a custom firmware on a SLR would be able to add a mode that just logs the intensity of the central small square of pixels at incredible speed.

    I guess people will have to start salting their encode functions with spurious calculations to try and make it a bit harder.

    • Spzi@lemm.eeOPEnglish
      3·
      1 year ago

      people will have to start salting their encode functions with spurious calculations to try and make it a bit harder.

      Yes … sad and funny. Or make sure the LED’s power supply is decoupled from the calculation. I feel adding extra code to security relevant functions might not be such a great idea. If a tiny extra battery does the job, why not.