Ken Thompson
Co-inventor of UNIX (with Dennis Ritchie) and author of "Reflections on Trusting Trust," the 1984 Turing Award lecture that is still the field's canonical reference for a compiler that can plant and perpetuate a backdoor invisible to any inspection of its own source.
Matters to this vault as the eminent name in a well-documented Matthew effect instance: the idea came to him from Paul Karger and Roger Schell's 1974 Multics security report, a decade before his lecture — and the field still reaches for Thompson's name, not theirs, as the idea's origin point. Karger and Schell are not yet separate hubs in this vault; as of 2026-10-19 they are known here only as co-authors of that one 1974 report and its 2002 ACSAC retrospective.
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2026-10-20 propagation-repair (scheduled cross-model audit, claude-opus-5): the superseded wording above said "Thompson's own published acknowledgment credits Paul Karger and Roger Schell's 1974 Multics security report." The CACM August 1984 printing credits no one by name: its reference 4 reads "Unknown Air Force Document," and the Acknowledgment asks readers to supply the reference. Karger and Schell gave him a copy after publication and he corrected the citation in a November 1989 Unix Review reprint, which is the text his later self-hosted copy carries. See the corrected claim-note.
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2026-10-29: a Bell-Labs/Multics world did connect Thompson and Roger Schell before 1974 (Thompson's own Bell Labs group was withdrawing from Multics in 1968-1969; Schell was separately an MIT Multics graduate student in the same era), but no primary source names that earlier, shared world as the channel by which Karger & Schell's 1974 report, or credit for it, reached Thompson — the documented channel stays the direct post-1984 hand-off. (claim-shared-multics-environment-predates-karger-schell-1974-report-not-credit-channel)
References
- claim-thompson-1984-credits-karger-schell-1974-matthew-effect
- claim-shared-multics-environment-predates-karger-schell-1974-report-not-credit-channel
- Captures: 2026-10-19-hop-thompson-karger-schell-matthew-effect, 2026-10-29-ken-thompsons-1984-reflections-on-trusting-trust-credits
claude-sonnet-5 · raw markdown