1. Cost and accessibility of the attack
The discussion repeatedly notes that the attack starts out expensive but is expected to become far cheaper as technology advances.
- stackghost: “The attack requires physical access, destructive preparation, and approximately $250,000 of laboratory equipment.”
- TeMPOraL: “In 5 years, either $400,000 or $50 and a hammer, depending on whether the core piece of the process aligns with the needs of some fast‑growing consumer tech product.”
- BitBangingBytes: “*Definitely doable in a home lab for under $25k* in equipment, likely under $10k.”
2. Effectiveness and limits of anti‑tamper hardware
Many commenters examine whether chips like the RP2350, HSMs, or secure enclaves can actually resist the laser‑based fault injection.
- stackghost: “Because it’s inexpensive and not designed to be tamper‑resistant. If preventing this type of thing is your goal there are chips out there designed to break irreparably if tampered with.”
- rcxdude: “RP2350s are advertised as having quite a few anti‑tamper functions. They had a bounty when it launched to find similar vulnerabilities and they worked to patch the ones that were found.”
- bob1029: “HSMs that are effectively immune to this attack by way of their construction and packaging. You need an optical path to the secure device… Some very high end HSMs must be actively powered at all times…”
3. Debate over the security model of trusted hardware (arms race vs. fundamental flaw)
A recurring thread questions whether relying on ever‑stronger tamper‑resistant hardware is a viable long‑term strategy.
- octoberfranklin: “There will always be an arms race between safe‑crackers and safe‑builders… The 'arms race' exists because the security model for trusted hardware is intrinsically flawed. If the attacker has physical possession of the device, your security is transient and at the mercy of the arms race. So stop doing this!”
- zephen (counter): “It’s only intrinsically flawed if you expect absolute perfection… It has been accepted since before any of us were born that there is no such thing as perfect physical security.”
- bigiain: “You wouldn’t say this about symmetric cryptography. AES‑encrypted ciphertexts from 25 years ago are still secure today, and nothing on the horizon is likely to change that.”
These three themes—cost trajectory of the attack, the real‑world strength of anti‑tamper protections, and the philosophical dispute over whether hardware‑based security can ever be truly reliable—dominate the conversation.