Sign in

Mark C

@largecardinal.bsky.social
1.5K followers 229 following 223 posts

Logician (PhD), Quantum Hacker, ML miscreant. Feral academic. Co-founder of Quantum Village @ DEF CON

PostsRepliesMedia
Mark C @largecardinal.bsky.social · 1h
"A thousand AI safety companies crying out in terror..." apnews.com/article/nvid...
apnews.com
000
Mark C @largecardinal.bsky.social · 16/09/2026
Ah so Dyson truly made the toothbrush for the OnlyFans age; a device that vibrates and squirts fluid on camera...
011
Mark C @largecardinal.bsky.social · 09/09/2026
Thoughts and prayers to CFD folks today... Source: r/CFD
27919
Mark C @largecardinal.bsky.social · 09/09/2026
Alt take on Navier-Stokes result: sentence solver finishes sentences started by Córdoba and Martínez-Zoro.
040
Reposted by Mark C
Reuters @reuters.com · 27/08/2026
Focus: As AI agents go rogue, cyber insurers are adapting their policies reut.rs/4qFg9vz
reut.rs
Focus: As AI agents go rogue, cyber insurers are adapting their policies
Cyber insurers have spent years defining what constitutes a hack and when coverage should pay out.
1149
Mark C @largecardinal.bsky.social · 25/08/2026
Hip hop in triple time? Wouldn't that make it hippity hoppity?? share.google/R64Y4bTv9Twt...
share.google
‘Why isn’t there hip-hop in 3/4 time?’: the groups reinventing a Polish folk dance for the modern age
The oberek is a traditional dance beloved of state folk ensembles – but a new generation of musicians is reconfiguring its music into wild new forms, merging folk steps with electronics and the sound ...
000
Mark C @largecardinal.bsky.social · 22/08/2026
Usain Volt www.theguardian.com/sport/2026/a...
theguardian.com
Chinese robot runs 100m sprint quicker than Usain Bolt’s world record
Chinese ⁠smartphone maker Honor’s self-developed humanoid ⁠robot Lightning ⁠ran ​the 100m in 9.32 seconds, ⁠beating the human world ⁠record of 9.58sec
020
Mark C @largecardinal.bsky.social · 18/08/2026
Oh I get it, it's only corporate espionage if you _don't_ post about B2B sales on LinkedIn afterwards... www.wiz.io/blog/red-age...
wiz.io
Red Agent Exploits Snowflake Vuln Missed by Github Copilot | Wiz Blog
Wiz Red Agent finds its way into Snowflake's internal Jira through a flaw in a GitHub Copilot–Assisted PR.
010
Mark C @largecardinal.bsky.social · 17/08/2026
Current status of Simon's dihedral coset algorithm for LWE...
0111
Mark C @largecardinal.bsky.social · 11/08/2026
E.V. PHONE HOME... defence-blog.com/royal-navy-n...
defence-blog.com
Royal Navy naval drone cameras secretly sent data to China
Cameras mounted on Royal Navy surveillance drones bound for special forces missions in the Gulf were secretly transmitting signals to an IP address inside China, The Telegraph reported, citing an inve...
000
Reposted by Mark C
Quantum Village @quantumvillage.bsky.social · 10/08/2026
🥁Drumroll for our incredible Superposition Sponsors, Quside! Our first ever official quantum electronic badge sponsors for Quantum Village @ DEF CON 34! With their support we were able to inspire over 30,000+ hackers and cybersecurity experts at the LVCC #DiffusionUnphased #QRNG #quside #defcon34
141
Reposted by Mark C
Quantum Village @quantumvillage.bsky.social · 07/08/2026
What would you ask a Nobel Laureate in Physics about quantum computing if you had the chance? Well, at Quantum Village @ DEF CON 34 this year, THAT CHANCE IS YOURS! We have the inimitable John Martinis, CTO of Qolab and Nobel Prizewinner in Physics 2025, coming to do the honours!
143
Mark C @largecardinal.bsky.social · 07/08/2026
Got a question about quantum computing for a Nobel Laureate? Be there, @quantumvillage.bsky.social at @defcon.bsky.social - 1130, Saturday!
033
Reposted by Mark C
Quantum Village @quantumvillage.bsky.social · 07/08/2026
Here’s a google form to put your burning questions into: forms.gle/2rqM3cpUJdcQ... See you there!
forms.gle
Q&A w/ John Martinis, Nobel Prize Winner 2025
Quantum Village is very proud to bring you a stellar session with Prof. John Martinis, CTO of Qolab and winner of the Nobel Prize in Physics 2025. Where: Quantum Village @ DEF CON 34 When: Sat, 1130...
011
Reposted by Mark C
Quantum Village @quantumvillage.bsky.social · 07/08/2026
give a talk on quantum computing and security at the village, Hall 2, 1130 on Saturday, but this will be followed by an extended Q&A session and we’d love to get your questions to put to the Prof! Where: Quantum Village, Hall 2, LVCC When: Talk @ 1130, Q&A @ 1200+
121
Reposted by Mark C
Dulwich Quantum Computing @dulwichquantum.bsky.social · 07/08/2026
Microsoft is too busy with delivering a useful topological quantum computer by 2029 to worry whether their Majorana qubits actually work. "This notion of having peer reviews and publications doesn't work in this fast-moving world right now. This paper thing is kind of boring now." archive.ph/xGlb7
1252
Mark C @largecardinal.bsky.social · 07/08/2026
We're quite excited to have Prof. Martinis coming this Sat at DEF CON... Be there, and get your questions in!
011
Mark C @largecardinal.bsky.social · 30/07/2026
In the spirit of writing more notes now that I'm attending more public meetings on subjects such as this, here's a nifty note about converting hidden shifts into hidden subgroup problems for quantum cryptanalysis: presheaf.blogspot.com/2026/07/note...
presheaf.blogspot.com
Note on Hidden Shifts as Hidden Subgroups
On of the key insights I acquired in the talks at QCPQA this last week was that a hidden shift over some finite abelian $A$ (usually $\mat...
000
Mark C @largecardinal.bsky.social · 25/07/2026
Answer in response to "why do quantum computing companies keep releasing simulators?"
031
Reposted by Mark C
fesshole 🧻 @fesshole.bsky.social · 14/07/2026
For eighteen months I thought my neighbour was called Teddy. His name was Simon. Teddy was his dog.
222162
Mark C @largecardinal.bsky.social · 15/07/2026
Ever had a PDF staring at you but no download button and don't want a frustrating dig through network requests to yank the file? Here's the slightly timesaving Chrome extensions I needed: github.com/unprovable/P...
github.com
GitHub - unprovable/PDFRecover: Chrome Extention to Recover streamed PDFs from web tabs
Chrome Extention to Recover streamed PDFs from web tabs - unprovable/PDFRecover
030
Reposted by Mark C
lynn @chordbug.bsky.social · 24/06/2026
fixed your headline
A hit song on the Billboard 100 charts is termed *$k$-good* if it is _ever_ in a weekly top-$k$, and *$k$-immediate* if it _debuts_ in the top-$k$.


An artist is *$(n,k)$-Olivian* if their $n$ first $k$-good hits are all also $k$-immediate.

*Headline 1.* Olivia Rodrigo is the first $(10,10)$-Olivian woman.
392042559
Mark C @largecardinal.bsky.social · 25/06/2026
I think I sorted reading this 😅
000
Mark C @largecardinal.bsky.social · 23/06/2026
Can those higher up the supply chain take our security a bit more seriously, please? KTHXBAI
000
Reposted by Mark C
Amy Tobey @renice.bsky.social · 18/06/2026
~25 years ago I crashed on a friend's couch before an interview. his dad, a former pastor, asked me what I was interviewing for, so I said, "Unix Administrator". he got a confused look for a moment, then started laughing, then asked me how I found enough eunuchs to need an administrator 😆
514515
Mark C @largecardinal.bsky.social · 18/06/2026
Tired: Facebook grief support group Wired: MournHub
041
Mark C @largecardinal.bsky.social · 15/06/2026
Teenagers doing online check bypasses and distributing them to each other? "County Lines: Cyber" wasn't a dystopia I was expecting just yet.
010
Mark C @largecardinal.bsky.social · 14/06/2026
Actual footage of the Anthropic situation rn...
111
Mark C @largecardinal.bsky.social · 09/06/2026
This is wild... Malware has LLM prompts to trip safety mechanisms in LLMs to evade detection. 👨‍🍳💋👌 socket.dev/blog/mini-sh...
socket.dev
Mini Shai-Hulud, Miasma, and Hades Worms Target Bioinformati...
Newer packages in this compromise use native extensions and .pth loaders to execute JavaScript stealers in developer environments.
010
Mark C @largecardinal.bsky.social · 09/06/2026
Watching people in a safe university bubble talk about technologies in the 'real world'...
010
Reposted by Mark C
Quantum Village @quantumvillage.bsky.social · 04/06/2026
We're looking for passionate volunteers to make QV an unforgettable and valuable experience to over 30k hackers and technologists. 👉 Sign up here: forms.gle/eAi5jBQoYmAC... 📍August 7th-9th at LVCC, Las Vegas, USA
forms.gle
Call for Volunteers/Scientists/Creators
This year's theme is: Agency Dates: August 7th-9th Location: Las Vegas Convention Centre, Las Vegas, NV, USA Quantum Village is a 501(c)(3) non-profit and is primarily volunteer driven, in order to ...
111
Reposted by Mark C
Quantum Village @quantumvillage.bsky.social · 04/06/2026
🔬⚛️ Calling all quantum experts and n00bs alike! Quantum Village is returning to DEF CON 34 for its fifth year and we need YOU. Link 🔗⤵️
111
Mark C @largecardinal.bsky.social · 21/05/2026
I'd love to see the survivorship stats on this... How many one shot maths conjecture runs came up with utter tosh vs. this one big win?
120
Reposted by Mark C
Anon Opin @anonopin.bsky.social · 20/05/2026
The "Life in Britain" citizenship test is a glorified pub quiz designed around English, not British, history.
8822
Reposted by Mark C
Marisa Kabas @marisakabas.bsky.social · 19/05/2026
i cannot. I CANNOT.
nytimes.com
Book on Truth in the Age of A.I. Contains Quotes Made Up by A.I.
611975332
Reposted by Mark C
Zack Whittaker @zackwhittaker.com · 15/05/2026
I wrote back in November about how easy it was to find leaked passport photos and driver's licenses online. The spills have only gotten worse in the months that age verification laws rolled out. We're reaching a point (if not already) where our government IDs aren't worth shit in the digital world.
this.weekinsecurity.com
It's far too easy to find leaked passports and driver's licenses online
Passports and driver's licenses are easy to find online, thanks to a dizzying array of websites and apps that require a copy but aren't keeping the data safe.
16642
Mark C @largecardinal.bsky.social · 07/05/2026
This was quite fun. Fun fact - the substitutions for x*y, -x, and x^{-1} are minimal (by exhaustive search). Enjoy!
010
Reposted by Mark C
Jordan Collver @jordancollver.bsky.social · 07/05/2026
I should be working, and yet...
Cover of the comic ABSOLUTE BATMAN altered to say ABSOLUTE HORSES with Batman's face swapped out for the snout of a horse.
8556441400
Reposted by Mark C
rand0h @akacki.net · 07/05/2026
I’m not over on the other platform anymore but this deserves sharing. Veneer finally starting to crack at some of these places.
103911
Reposted by Mark C
The Serfs (youtube.com/theserfstv) @theserfstv.bsky.social · 02/05/2026
Wrote entire books about how people who believe fairies live in gardens are idiots only to fall in love with a calculator that calls him smart
333130617
Reposted by Mark C
The Onion @theonion.com · 02/05/2026
JD Vance Still Waiting For Secret Service To Retrieve Him From Secure Hiding Area
theonion.com
JD Vance Still Waiting For Secret Service To Retrieve Him From Secure Hiding Area
392678297
Mark C @largecardinal.bsky.social · 24/04/2026
Tired; use poetry to hack your AI... Wired; bad bard. www.forbes.com/sites/lancee...
forbes.com
How Poetry Is Diabolically Being Used In Everyday Prompts To Get AI To Do Things It Isn’t Supposed To Do
Hackers and evildoers are using adversarial poetry to jailbreak AI. The trick involves writing poems as prompts. AI safeguards can be averted. An AI Insider scoop.
010
Mark C @largecardinal.bsky.social · 24/04/2026
This just in - your adversary is PQC!! arstechnica.com/security/202...
arstechnica.com
In a first, a ransomware family is confirmed to be quantum-safe
Technically speaking, there's no practical benefit to use PQC. So why is it being used?
130
Mark C @largecardinal.bsky.social · 19/04/2026
Joooooooooookes blog.trailofbits.com/2026/04/17/w...
blog.trailofbits.com
We beat Google’s zero-knowledge proof of quantum cryptanalysis
Trail of Bits discovered and exploited memory safety and logic vulnerabilities in Google’s Rust zero-knowledge proof code to forge a proof claiming better quantum circuit performance metrics than Goog...
011
Reposted by Mark C
Quantum Village @quantumvillage.bsky.social · 18/04/2026
#Quantum + #AI starts here!! We added an MCP server to make the world's first AI native Agent Ready QRNG! Take a look: github.com/QuantumVilla... This endpoint exposes the QRNG status, the health of the generated bits, and if course gives access to the whitened entropy!
github.com
EntropyLoop/mcp at main · QuantumVillage/EntropyLoop
A Fully Open Source, Low Cost Phase-Diffusion Quantum Random Number Generator Using Off the Shelf Parts, Brought to you by Quantum Village - QuantumVillage/EntropyLoop
031
Mark C @largecardinal.bsky.social · 18/04/2026
Agentic Quantum, anyone?
121
Reposted by Mark C
Mark C @largecardinal.bsky.social · 17/04/2026
Update; this is now the first AI Agent native QRNG! MCP server ready to go. 🦞🔗⤵️
174
Mark C @largecardinal.bsky.social · 17/04/2026
Update; this is now the first AI Agent native QRNG! MCP server ready to go. 🦞🔗⤵️
174
Mark C @largecardinal.bsky.social · 15/04/2026
Opening a lecture on Intro to Graph Theory: "Euler was the first to connect the dots..."
041