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Falcon Down: Breaking Falcon Signature Scheme Through Side-Channel Attacks [pdf] (2021)

• xhkkffbf 3y ago
  This is interesting news. I wonder if the EMF leaking from other chips can divulge keys?
  • kyboren 3y ago
    Yes, it can and will, unless very special care is taken to ensure it does not. See also TEMPEST[0] and NSTISSAM[1]. [0]: https://en.wikipedia.org/wiki/Tempest_%28codename%29 https://en.wikipedia.org/wiki/Tempest_%28codename%29 [1]: https://web.elastic.org/~fche/mirrors/cryptome.org/nt1-92-1-5.htm https://web.elastic.org/~fche/mirrors/cryptome.org/nt1-92-1-...
  • tptacek 3y ago
    It's not news, is it? It's from 2021.
• api 3y ago
  This isn’t the same as a true mathematical break, but what it does show is that Falcon is very hard to implement without presenting side channels attacks. That makes it unfavorable to a lot of cryptographers.
  • jnwatson 3y ago
    It took a long time before we came up with a bunch of mechanisms to hide the power profile of ECC scalar multiplies. I expect the same here.
• deleted 3y ago
  [deleted]