Huang: IRIS (Infra-Red, in situ) Project Updates
Date:
Sun, 10 Mar 2024 10:24:53 +0000
Description:
Andrew 'bunnie' Huang provides an update on
his IRIS infrared chip-scanning project as the starting point for a
detailed summary on how chip customers can detect forgeries and
modifications in general. The technique works because although silicon looks opaque at
visible light, it is transparent starting at near-infrared
wavelengths (roughly 1000 nm and longer). Today's commodity optics
and CMOS cameras are actually capable of working with lights at
this wavelength; thus, IRIS is a low-cost and effective technique
for confirming the construction of chips down to block level. For
example, IRIS can readily help determine if a chip has the correct
amount of RAM, number of CPU cores, peripherals, bond pads,
etc. This level of verification would be sufficient to deter most
counterfeits or substitutions.
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Link to news story:
https://lwn.net/Articles/964956/
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