@JohnDCook

Consultant in applied math and data privacy

 Houston
johndcook.com
Joined November 2008
  • Tweets40.6K
  • Following261
  • Followers56.5K
1.9KMedia
To be fair, the interviewer said "you're not related to him at all" and she said "not to my knowledge." Didn't ask if he's her brother. I expect she's lying, but it's plausible to say "not to my knowledge" when asked whether you're related to someone. xitter.cf/BillMelugin_/status/21…
Bill Melugin
@BillMelugin_13h
Rep. Ilhan Omar (D-MN) when asked by MS Now tonight if she married her brother: "Not to my knowledge."
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Computer Science
@CompSciFact32m
How the eMudrha certificate debacle might have happened johndcook.com/blog/2026/10/2…

How the eMudrha certificate debacle might have happened

How might eMudrha generated seven tiny ECC keys

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Knoll’s Law of Media Accuracy: "Everything you read in the newspapers is absolutely true except for the rare story of which you happen to have firsthand knowledge."
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Tib3rius
@0xTib3rius14h
Reminder that we're only 2/3 the way through Cybersecurity Awareness Month. Pretty sure we've outdone all of the previous months combined. Well done everyone.
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“I read the news today oh boy.” ♬
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Samuel Colvin
@samuelcolvin10h
I read this and I'm terrified, the situation seems intractable. In the python ecosystem alone every cpython install, venv, UV is at risk. Don't get my started on npm, pnpm, yarn, go, rust. My current 2026 security posture: stay home and only connect to the internet from a trusted ISP. The winter is coming. discuss.python.org/t/informa…

Information for Python users regarding eMudhra / emSign CA certificate security incident

A security incident affecting eMudhra intermediate certificates has required removing the emSign root CA certificate from CA bundles such as “certifi”. It’s important to immediately upgrade the...

discuss.python.org
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“There are decades where nothing happens; and there are weeks where decades happen.” — Lenin This seems like one of those weeks.
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The Abduction of Persephone, by Nicola Maria Rossi, early 18th c
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I Am Devloper
@iamdevloperOct 21
I just started coding with PHP this morning, anything I should look out for?
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James Hall
@ItsJamesHallOct 21
Wait a minute, so if you tax the rich they just leave?
Kalshi
@KalshiOct 21
JUST IN: Google co-founder Larry Page has reportedly moved into a $173M home in Miami to avoid $15B of California taxes
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Taylor Swift's silence on the PHP CVE is deafening
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Someone literally did the meme. johndcook.com/blog/2026/10/2…
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Algebra Etc.@AlgebraFact23h
The NIST elliptic curves have been in the news twice lately. johndcook.com/blog/2026/10/2…

Backdoors, Incompetence, and Elliptic Curves

The NIST curve P-384 has been in the news twice lately, once for a result from Anthropic and once for incredibly bad key choices.

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"A thoroughly engaging and well-articulated piece! The insights here offer plenty of food for thought, especially regarding how continuous iteration and thoughtful planning shape long-term outcomes across diverse projects. ..." High praise for a post on factorials. ;)
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I hate spam, but sometime it's amusing.
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John
@johnbhigginsOct 14
But understanding system design is now 10x valuable.
Tomasz Łakomy
@tlakomyOct 14
Being able to write code is no longer a value add.
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CG
@cgtwtsOct 21
“we’d be profitable if we didn’t lose $80 billion”
Polymarket
@PolymarketOct 20
JUST IN: Anthropic recorded a staggering $80,000,000,000.00 net loss in the first half of 2026.
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Deliberate imperfection in Ecclesiastes 3 (There is a time for everything, ...) and why it makes me think of Beethoven johndcook.com/blog/2026/10/2…
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PoIiMath
@politicalmathOct 20
Whenever someone says that AI is like "magic", they mean it is a tremendously delicate and specific process that requires proper inputs and incantations and can very easily go off the rails for a novice practitioner
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Interviewing people for a small company is far more fun than going thru the HR rituals of a big company.
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