The Original Sin of Computing...that no one can fix
What if we can't trust *ANY* software...even if you have the source code? A perfect, self-replicating "sin" passed down for generations of compilers. Invis...

LaurieWired
1.5M views • Oct 8, 2025

About this video
What if we can't trust *ANY* software...even if you have the source code?
A perfect, self-replicating "sin" passed down for generations of compilers. Invisibly compromised in every program.
It sounds like a spy novel; only it actually happened.
Ken Thompson, creator of UNIX, theorized how Code Auditing won't save you. This is how it works...and why it's already in the wild.
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Timestamps:
00:00 Original Sin
02:06 Compiler Family Tree
05:44 Self Reproducing Code
10:42 Obfuscating the Quine
13:24 C touches EVERYTHING
17:43 A Mitigation (sorta)
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Check out my X account for cool Computer Science stuff!
https://x.com/lauriewired
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Reflections on Trusting Trust, Ken Thompson:
https://dl.acm.org/doi/10.1145/358198.358210
David Wheeler's Diverse Double Compiling Mitigation:
https://dwheeler.com/trusting-trust/
A perfect, self-replicating "sin" passed down for generations of compilers. Invisibly compromised in every program.
It sounds like a spy novel; only it actually happened.
Ken Thompson, creator of UNIX, theorized how Code Auditing won't save you. This is how it works...and why it's already in the wild.
---
Timestamps:
00:00 Original Sin
02:06 Compiler Family Tree
05:44 Self Reproducing Code
10:42 Obfuscating the Quine
13:24 C touches EVERYTHING
17:43 A Mitigation (sorta)
---
Check out my X account for cool Computer Science stuff!
https://x.com/lauriewired
---
Reflections on Trusting Trust, Ken Thompson:
https://dl.acm.org/doi/10.1145/358198.358210
David Wheeler's Diverse Double Compiling Mitigation:
https://dwheeler.com/trusting-trust/
Video Information
Views
1.5M
Likes
66.7K
Duration
22:20
Published
Oct 8, 2025
User Reviews
4.8
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