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DEF CON 26 - Christopher Domas - The Ring 0 Facade Awakening the Processors Inner Demons

DEF CON 26 - Christopher Domas - The Ring 0 Facade Awakening the Processors Inner Demons on HackerTube: recommended by 2 Hacker News commenters across 2 separate months, 2019–2026.

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talk · advanced · evergreen

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Christopher Domas's DEF CON 26 talk on secret processor registers that vendors reserve for third parties holding trusted keys. He examines how users are locked out of parts of their own CPUs.

Why Hacker News recommends it

HN commenters call his x86 internals talks spectacular and mention them whenever low-level processor surprises come up.

people recommended it
2
separate months
2
strong recommendations
2
discussed on HN
2019–2026
“I remember watching his Defcon talks on x86 shenanigans[^1][^2] and being amazed at what he's been able to discover”
— aecsocket, Aug 2026, in “Spaghettifying DRAM”

What HN commenters said

3 Hacker News comments link this video. Each one links back to its thread.

aecsocketAug 2026Strongly recommends

Holy shit, Christopher Domas is back. I remember watching his Defcon talks on x86 shenanigans[^1][^2] and being amazed at what he's been able to discover. Then he got whisked away by Intel and now drops this. I'm excited. [^1]: ▶ this video [^2]: [link]

in “Spaghettifying DRAM” · View on HN

daniel-thompsonAug 2021Strongly recommends

These links don't work for me, but the videos are on YT: - [link] - ▶ this video And yes, they are spectacular.

in “Compiling C Programs Into “Mov” Instructions (And Only “Mov” Instructions)” · View on HN

kbensonJun 2019Cites it

While somewhat interesting, I'm not sure there's much to discuss unless the presentation or details are already available. Interestingly, this reminds me of two Defcon talks I watched in the last day or two, which also cover vulnerability through additional processors onboard.[1][2] 1: [link] 2: ▶ this video

in “Everybody Be Cool, This Is a Robbery” · View on HN

Topics & tags

Security & hackingComputer architecture & CPUsx86hardware securitycpu registersreverse engineeringdef con