Thread

Photon-Emission-Guided Laser Fault Injection Enables RP2350 Secure Debug

220 points · 92 comments · synack

jacquesm · 1789753642 · focus · HN ↗
That's reminiscent of when we first found out that if you opened up dram chips you could use them for imaging. Of course the scale at which this is done is extremely impressive.
1. xattt · 1789760195 · focus · HN ↗
  For the curious: <a href="https://hackaday.com/2014/04/05/taking-pictures-with-a-dram-chip/" rel="nofollow">https://hackaday.com/2014/04/05/taking-pictures-with-a-dram-...
  1. jacquesm · 1789760875 · focus · HN ↗
    A lot earlier than that.
    <a href="https://www.cs.uaf.edu/2007/fall/cs441/support/dram_sensor_1984_whitehead.pdf" rel="nofollow">https://www.cs.uaf.edu/2007/fall/cs441/support/dram_sensor_1...
    buescher · 1789773110 · focus · HN ↗
    Even earlier than that. The cromemco camera and similar hobbyist projects dated from the mid-70s.
    xattt · 1789822362 · focus · HN ↗
    I’m curious whether this is truly the first, or whether classified aerospace projects had quietly developed digital imaging devices for reco a decade earlier.
    buescher · 1789863228 · focus · HN ↗
    I would guess that it's maybe not, because I've never heard of any IC DRAM before the commercially available Intel DRAM.
    Other types of imaging devices, sure. But the trick of decapping a DRAM requires a DRAM chip.

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