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A comment on Show HN: The SC4-HSM, a fully open USB hardware secure module. Parent comment

Re:Show HN: The SC4-HSM, a fully open USB hardware secure mo... by mkj on Friday July 08, 2016 @03:55AM (#12054118)
Nice, I'd wondered how hard that would be. Could you share details?
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Re:Show HN: The SC4-HSM, a fully open USB hardware secure mo... by kosma on Friday July 08, 2016 @04:12AM (#12054168)
The FPB (flash patch and breakpoint) peripheral on Cortex-M3 allows live-patching the flash contents; this allows you to temporarily change the reset vector. That, plus careful supply voltage glitching to reset some peripherals but not other, and the device is pwned.
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Re:Show HN: The SC4-HSM, a fully open USB hardware secure mo... by lisper on Friday July 08, 2016 @04:19AM (#12054200)
Nice! But it sounds like it would not be effective against RDP level 2.
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