I asked Claude how relevant this is to protecting something like a H100, here are the parts that seem most relevant from my limited understanding:
What the paper actually demonstrates:
1. Reading (not modifying) data from antifuse memory in a Raspberry Pi RP2350 microcontroller
2. Using Focused Ion Beam (FIB) and passive voltage contrast to extract information
Key differences between this and modifying an H100 GPU:
3D Transistor Structures: Modern 5nm chips use FinFET or GAAFET 3D structures rather than planar transistors. The critical parts are buried within the structure, making them fundamentally more difficult to access without destroying them.
Atomic-Scale Limitations: At 5nm, we’re approaching atomic limits (silicon atoms are ~0.2nm). The physics of matter at this scale creates fundamental boundaries that better equipment cannot overcome.
Ion Beam Physics: Even with perfect equipment, ion beams create interaction volumes and damage zones that become proportionally larger compared to the target features at smaller nodes.
Hey,
On anti-trust laws, see this comment. I also hope to have more to share soon