3 ms·

Power Analysis: A Complete Break of the KeeLoq Code Hopping Scheme (2008) [pdf]

• rini17 7y ago
  Differential power analysis vulnerability is still pervasive. Why can't the CPU cut itself off and switch to internal power (supercapacitor) while it does sensitive computations? Even external switch+supercap potted together with CPU would be an improvement.
  • nullc 7y ago
    Often using a magnetic probe is better than a current shunt in any case, due to power regulator noise. I can only imagine that shielding a device intended to be a radio transmitter would not be an easy proposition. :) Would it really be that much of an improvement to remove one vector when there is another equally good vector immediately available?
    • rini17 7y ago
      IMO magnetic probe requires proximity - prying the package open instead of just measuring current from power supply (battery, USB). Is that equally good?