Sign in

Marcel Keller

@mkskeller.bsky.social
504 followers 310 following 53 posts

Cryptographer who likes to implement multi-party computation and works for CSIRO's Data61. Views my own. 🏳️‍🌈🇨🇭🇦🇺 (he/him)

PostsRepliesMedia
Reposted by Marcel Keller
Louis Barclay @louisbarclay.bsky.social · 29/09/2026
The latest urgent research from the Center for the Alignment of AI Alignment Centers: alignmentalignment.ai/caaac/blog/p...
alignmentalignment.ai
Prediction: AI will kill every human by next year, or not
Our latest prediction model uses cutting-edge binary methodology to forecast potential AI futures
0115
Reposted by Marcel Keller
Clément Canonne @ccanonne.github.io · 29/09/2026
The report from the AI + TCS Working Group held at the @simonsinstitute.bsky.social is out, including "twelve concrete near-term recommended actions." Currently reading it: while I have some reservations, but there is some good in it! Notably items 7, 8, and 11. simons.berkeley.edu/ai-tcs-worki...
7. Best works and technical talks in interviews.

- Emphasize quality over quantity. Evaluate candidates on no more than three  works of their choosing, with this fact explicit in the instructions for candidates and their letter writers.

- Test technical depth. Evaluate the depth of the candidates’ understanding of the aforementioned works more than was done normally until now.

8. Additional postdocs. Establish additional postdoctoral positions for the TCS community, a temporary measure that will be phased out after a few years.

9. Workshops for identifying new theory directions. First, organize a workshop (or several) with the goal of identifying a list of modern topics related to AI; and second, run a series of workshops on each of these topics to identify fundamental directions and establish foundations and agendas for future work.

10. “TCS in the Age of AI” series at the Simons Institute. Establish a recurring and widely accessible “TCS in the Age of AI” series at the Simons Institute.

11. Opportunities for training and evaluation without AI assistance. To ensure development of necessary skills for a successful career in academia, a PhD in TCS should partially include training and evaluation components where the use of AI is forbidden.
43112
Reposted by Marcel Keller
Miro Haller @mirohaller.bsky.social · 21/09/2026
We finally finished the universal signature forgery for 1024-bit RSA! 2^32 oracle queries, 1200 core years precomputation, 180 core years for an individual forgery, and 3 years of human labor (no AI involved) by Laura, Adam, Nadia, Emmanuel and me to pull of this computation against real HSMs.
14019
Reposted by Marcel Keller
Joseph Cox @josephcox.bsky.social · 14/09/2026
New from 404 Media: humans are reading ChatGPT conversations. OpenAI has hired an army of contractors who read real ChatGPT users' chats. I've seen internal docs, the review system, and real user prompts. Sometimes they contain very personal and sensitive information www.404media.co/inside-proje...
404media.co
Inside ‘Project Lily’: The Humans Reading Your ChatGPT Chats
Humans are reading ChatGPT users’ prompts to improve OpenAI’s models, and those chats can include sensitive, personal information, according to leaked internal documents and real prompts seen by 404 M...
561998986
Reposted by Marcel Keller
Ed Zitron @edzitron.com · 13/09/2026
I resigned from JibJab over what I believe are dangerous intelligences creating deepfakes
20128094
Reposted by Marcel Keller
Kenny Paterson @kennyog.bsky.social · 10/09/2026
Our latest “Crypto in the Wild” project, analysing secure email gateways. We give 29 cryptographic attacks on 4 different products, from SEPPmail, Cisco, Proton and CipherMail. Paper to appear at ACM CCS 2026.
11911
Reposted by Marcel Keller
Alex Hanna @alexhanna.bsky.social · 09/09/2026
'Megan recalled asking Austin what he was doing on his phone. She said he replied, “Talking to the AI.” When she pressed — asking “About what?” — he said, “Trauma.”' This is a heartbreaking read.
24314
Reposted by Marcel Keller
Clément Canonne @ccanonne.github.io · 09/09/2026
For context, to ground the conversation and explain one of the issues. USD20M, which is a self-reported (likely low-balled) estimate of what OpenAI burned in *one week* in their scooping race, would fund 100 full-time postdoctoral positions for 2 years (including overhead). 100 postdocs. 2 years.
24612
Reposted by Marcel Keller
Shriram Krishnamurthi @shriram.bsky.social · 08/09/2026
Sorry, XKCD.
XKCD 435 Purity (https://xkcd.com/435/) with added OpenAI logo saying "Oh, hey, I didn't see you guys … but I did see your chats."
0388
Reposted by Marcel Keller
Claudio Orlandi @claudiorlandi.bsky.social · 07/09/2026
Registration for the PPML workshop in Aarhus November 2-4 is now open. The deadline for talk submissions is also this week (September 10). Feel free to reshare! p1dpml.github.io/workshops/wo...
p1dpml.github.io
Workshop 2 | Data Privacy in Machine Learning
042
Reposted by Marcel Keller
Holger Hestermeyer @hhesterm.bsky.social · 20/08/2026
This incident needs to be thoroughly investigated. If true, no public office in the EU or any member state can continue to run any microsoft products. nltimes.nl/2026/05/22/m...
nltimes.nl
Microsoft accused of leaking Dutch civil servants' names to U.S. government
Microsoft has reportedly shared the names of Dutch civil servants working for two regulatory agencies with the U.S. House of Representatives. The agencies involved include the Authority for Consumers ...
28783426
Reposted by Marcel Keller
Tianxin Tang @koptxin.bsky.social · 20/08/2026
dontpastetheai.com (currently struggling with this a lot with masters students...)
dontpastetheai.com
Don't paste the AI.
If someone asks you a question, paste your answer — not the chatbot's.
011
Reposted by Marcel Keller
Martin R. Albrecht @malb.bsky.social · 17/08/2026
As funny as it is that they simply dropped frida.re on Encrochat devices, to me the two big Encrochat questions that still aren't resolved are:
frida.re
Frida • A world-class dynamic instrumentation toolkit
Observe and reprogram running programs on Windows, macOS, GNU/Linux, iOS, watchOS, tvOS, Android, FreeBSD, and QNX
144
Reposted by Marcel Keller
Michael A. Specter 👻 @mikespecter.com · 17/08/2026
We also bought EncroChat's original domain (encrochat.ch) --- it now hosts our paper and other info.
encrochat.ch
A Real-World Law-Enforcement Hack: The Case of Encrochat
0107
Reposted by Marcel Keller
Kenny Paterson @kennyog.bsky.social · 15/08/2026
Signal is the gold standard for secure messengers. We broke Signal’s integrity (twice) in this paper via message injection attacks. @kientuong114.bsky.social presented this week at #USENIX and he and Noemi will present it again at #WAC (Crypto workshop) this weekend. Catch their talk if you can!
02911
Reposted by Marcel Keller
Electronic Frontier Foundation @eff.org · 11/08/2026
Two SF gay bars have dropped PatronScan after hearing customers’ privacy concerns. That’s a good start. Others should follow their lead. www.eff.org/deeplinks/2...
eff.org
Why Are Gay Bars Building Databases of Their Patrons?
Recent reports have raised alarm about the use of PatronScan, an ID-checking and face-scanning system, at multiple LGBTQ+ bars in San Francisco’s Castro neighborhood. For venues serving vulnerable
513642
Reposted by Marcel Keller
Clément Canonne @ccanonne.github.io · 10/08/2026
So many good points in this post by @nsaphra.bsky.social: only quoting a couple, to encourage you to read the others. "My colleagues and students adopt the writing quirks they read throughout the day, and their own writing becomes more like an LLM’s." nsaphra.net/post/uncanny/
To find a nugget of meaning, the user must sift through mounds of slop—and some simply won’t bother. They’ll serve the slop unfiltered to another party, who performs this interpretive labor themselves, only to discover that the underlying meaning does not exist. When someone expects me to perform their share of this interpretive labor, I get angry. Grice’s rules are, in essence, rules of etiquette—their unwarranted violation is rude.
1368
Marcel Keller @mkskeller.bsky.social · 07/08/2026
Only through the title of this paper did I learn that there's a cryptographic technique that sounds like using a popular dating app. The community will be delighted.
030
Reposted by Marcel Keller
Clément Canonne @ccanonne.github.io · 17/07/2026
Well. That is quite the headline from Le Monde Diplomatique.
A poster with the headline from the monthly edition of Le Monde Diplomatique: "Tout le monde déteste l'IA" (Everyone hates AI)
281
Reposted by Marcel Keller
Clément Canonne @ccanonne.github.io · 17/07/2026
Take some time (very little) to weigh on this: "Now Is the Time to Give LLMs Access to the ACM Digital Library" docs.google.com/forms/d/e/1F... (not that I want to influence anyone, but my own position is along the lines of "hell no.")
docs.google.com
Now is the Time to Give LLMS Access to the ACM Digital Library Why ACM Believes the benefits outweigh the risks in opening up the ACM Digital Library to large lan...
ACM welcomes your feedback! All responses will be read and considered by ACM.
3112
Reposted by Marcel Keller
mccurley.bsky.social @mccurley.bsky.social · 09/07/2026
The IACR board has put forward a proposal to revamp the publishing of the general conference proceedings for Eurocrypt, Crypto, and Asiacrypt. iacr.org/hybridpropos... I would encourage members to engage in discussion about this on iacr.org/discuss
iacr.org
Concrete Hybrid Journal Proposal
01911
Marcel Keller @mkskeller.bsky.social · 06/07/2026
The latest version of MP-SPDZ is a maintenance release, with the most important change being two severe protocol bug fixes. github.com/data61/MP-SP...
github.com
Release Maintenance · data61/MP-SPDZ
Fixed security bug: malicious parties not committed to MAC key across threads and executions Fixed security bug: insufficient checks in Rep4 Improved radix sort Optimized 32-bit computation Multith...
110
Reposted by Marcel Keller
School of Computer Science, University of Sydney @sydneycompsci.bsky.social · 01/07/2026
🚨📣 Qiang Tang and @aravind16coiner.bsky.social are organising a one-day cryptography school on August 7, 2026. Open to UG, master's, and PhD students. Free attendance, but registration required! sydney-cryptography-group.github.io/activities-e...
013
Reposted by Marcel Keller
the beggars out of here getter @milesklee.bsky.social · 16/06/2026
Tim Ferriss, author of the 4-Hour Work Week and other self-help slop, is seeing his book sales crater because people are getting their advice from ChatGPT instead lmao
ChatGPT, powered by the updated GPT-3.5 model, launched on November 30, 2022.

There was a gentle -5% slip in 2023, then -13% in 2024, and then the floor disappears: -46% in 2025, followed by an even steeper -57% pace this year. If the run-rate holds, my catalog will sell roughly 80% fewer print copies in 2026 than it did in 2022, with almost all of that happening since LLMs like Claude and ChatGPT exploded in use. 

But what about ebooks and audio?

Looking at all formats (print + ebook + audio) for the catalog in 2025, the second half of the year was down ~45% versus the first half.
3666086
Reposted by Marcel Keller
Gernot Heiser @microkerneldude.bsky.social · 10/06/2026
UNSW Sydney is #hiring systems faculty – talk to me if you’re interested. This is for mid-career researchers in the AU Lecturer–Senior Lecturer–Associate Professor–Professor progression. Tenure is orthogonal to position level – closes 31 July. external-careers.jobs.unsw.edu.au/cw/en/job/54...
external-careers.jobs.unsw.edu.au
Associate Professor in Systems
Join an organisation that is shaping the future direction of modern computing systems in Australia, in a senior academic role that combines research leadership, strategic contribution, and excellence ...
022
Marcel Keller @mkskeller.bsky.social · 05/06/2026
UNSW Sydney is hiring an associate professor and a lecturer in cryptography, and the description explicitly mentions *secure computation*. Didn't you want to live in the sunniest of the most livable cities in the world?
external-careers.jobs.unsw.edu.au
Associate Professor in Cryptography
Join an organisation that is shaping the future direction of cryptography and secure computation in Australia, in a senior academic role that combines research leadership, strategic contribution, and ...
166
Reposted by Marcel Keller
Steven Murdoch @steven.murdoch.is · 02/06/2026
For 19 years, GPS satellites have secretly broadcast a “numbers station” in their signals. We decoded 12M messages: a 2011 flash where 31 satellites flipped in hours, “ghost” substrings repeating years apart, and a “TEXT” prefix spreading now. lsc-pagepro.mydigitalpublication.com/publication/...
lsc-pagepro.mydigitalpublication.com
Inside GNSS Media & Research • May/June 2026 • 62
621985
Reposted by Marcel Keller
Peter Vamplew @amp1874.bsky.social · 03/06/2026
A new policy from IEEE Transactions on Wireless Communications "An author may submit at most 36 new manuscripts to the IEEE TWC each year. Submissions exceeding this limit will be rejected without review. " 36!!! Somehow I don't think I'm likely to have a problem with this.
211
Reposted by Marcel Keller
Fernando @fernand0.bsky.social · 02/06/2026
60% of MD5 password hashes are crackable in under an hour
theregister.com
60% of MD5 password hashes are crackable in under an hour
0168
Reposted by Marcel Keller
Mathy Vanhoef @vanhoefm.bsky.social · 19/05/2026
Nominate yourself to help review papers for USENIX Security 2027! sec-rms.com/submit-appli... (or rms.swag.cispa.de/submit-appli... ). Deadline: May 28, 2026. We're looking for both senior and junior people. See Andrei Sabelfeld's LinkedIn post for more info: www.linkedin.com/feed/update/...
sec-rms.com
Signal PC interest - USENIX Security Symposium
025
Reposted by Marcel Keller
YIMBY Melbourne @yimby.melbourne · 20/05/2026
Grattan Institute’s new report shows that letting Australian homebuyers choose the car-parking they need will: → make housing cheaper, → get more homes built faster, and → create more walkable cities.
1167
Reposted by Marcel Keller
Hadas Weiss @hadas.bsky.social · 15/05/2026
15980171
Reposted by Marcel Keller
Sofia Celi @claucece.bsky.social · 14/05/2026
Go MAYO!! Moving to the third round of the PQC NIST process!
0115
Reposted by Marcel Keller
Andrea Basso @andreavbasso.bsky.social · 14/05/2026
Round 3 of the NIST additional signatures process announced! 🎉 And SQIsign is part of it!! ⛷️⛷️
Screenshot of email announcement saying:

Nine Candidates Advance to the Third Round of the Additional Digital Signatures for the PQC Standardization Process

 After 18 months of evaluation, NIST has selected nine candidates for the third round of the Additional Digital Signatures for the Post-Quantum Cryptography (PQC) Standardization Process. The advancing digital signature algorithms are:

FAEST
HAWK
MAYO
MQOM
QR-UOV
SDitH
SNOVA
SQIsign
UOV
02613
Reposted by Marcel Keller
michael veale @michae.lv · 28/04/2026
south africa withdraws own government AI policy over hallucinated citations www.reuters.com/world/africa...
13023
Reposted by Marcel Keller
Fredrik Dahlgren @fegge.bsky.social · 17/04/2026
Two weeks ago, Google published a paper proving in zero-knowledge that they had an efficient implementation of Shor's algorithm. Today, Trail of Bits can prove that we have an even better implementation which beats Google's on all metrics! 🫢 blog.trailofbits.com/2026/04/17/w...
A table listing total operations, number of qubits, and Toffoli-gate count for Google's low-gate and low-qubit implementations, and Trail of Bits' implementation. The Trail of Bits implementation beats Google's on every metric.
18230
Reposted by Marcel Keller
Joseph Cox @josephcox.bsky.social · 16/04/2026
This is a great (and horrifying?) piece about how Sam, in preparation for her marriage, was pulled into the bridal algorithm. Her experience of social media changed completely overnight www.404media.co/wedding-plan...
404media.co
I Almost Lost My Mind in the Bridal Algorithm
As a #2026Bride, the constant, aggressive content started to make me feel like I was losing sight of what mattered. And I'm far from alone.
07617
Reposted by Marcel Keller
Sophie Schmieg @sophieschmieg.infosec.exchange.ap.brid.gy · 02/04/2026
A very nice explainer why "if you're so worried about quantum computers, why haven't they factored 21 yet?" isn't a very convincing argument. Look at the labels of the graph, and how extremely close the various lines are for factoring 21 and 2048 bit numbers. Polynomial scaling remains […]
infosec.exchange
Original post on infosec.exchange
02417
Reposted by Marcel Keller
COSIC @cosic.bsky.social · 11/03/2026
🎉 Proud moment for COSIC! Prof. Nigel Smart has received the #RSAC 2026 Award for Excellence in the Field of Mathematics for his groundbreaking work in #MPC, Threshold #Cryptography & foundational crypto research. Congratulations, Nigel! 👏 www.rsaconference.com/library/pres...
rsaconference.com
RSAC Set to Honor Excellence in the Field of Mathematics Awards, Inaugural Test of Time Awards at RSAC 2026 Conference
032
Reposted by Marcel Keller
Kenny Paterson @kennyog.bsky.social · 17/02/2026
A very nice blogpost explaining our work - slices right through the marketing from the vendors: medium.com/reading-sh/y...
medium.com
Your password manager’s ‘zero knowledge’ promise is broken
What ETH Zurich’s USENIX Security paper means for anyone who stores passwords in the cloud.
021
Reposted by Marcel Keller
Claudio Orlandi @claudiorlandi.bsky.social · 10/02/2026
Call for submissions: #TPMPC2026 (Theory & Practice of MPC) Submit your latest and coolest results by March 2, 2026. Aarhus, Denmark, May 18–22, 2026. Monday: MPC security in practice. Friday: Symposium celebrating Ivan Damgård’s work. Links in comments.
166
Reposted by Marcel Keller
Tjeerd Royaards @tjeerdroyaards.com · 02/02/2026
The robot apocalypse hasn't happened yet, but still I can't escape the feeling that something has gone horribly wrong... Cartoon for Dutch newspaper @trouw.nl. More of my work for Trouw: www.trouw.nl/cartoons/tje... #ArtificialIntelligence #creativity #work #GenerativeAI
Cartoon showing a street in the rain. A man on a bike is delivering food, while another courier is delivering packages from Amazon. Two other workers are collecting garbage. Inside one of the houses on the street, we see robots labeled 'AI' sitting dry and warm, engaged in making a paining, playing the violin and writing.
9594256
Reposted by Marcel Keller
Pavel @spavel.bsky.social · 01/02/2026
Person: say, i am alive.

Computer: I am alive.

Person: oh my god.
82231975062
Reposted by Marcel Keller
Clément Canonne @ccanonne.github.io · 24/01/2026
The number of people arguing, following the #NeurIPS2025 case, that a bit of systematically bad scholarship and borderline academic misconduct is OK because doing things the right way is tedious and time-consuming is concerning. Yes, doing things well might be boring. But doing them badly is... bad
1568
Reposted by Marcel Keller
Dulwich Quantum Computing @dulwichquantum.bsky.social · 20/01/2026
Advice for Jens Eisert. doi.org/10.1038/d415...
doi.org
I’m going to halve my publication output. You should consider slow science, too
If we don’t slow down, the research enterprise is going to crash, argues Adrian Barnett.
1123
Reposted by Marcel Keller
Rasmus Pagh @rasmuspagh.net · 09/01/2026
Consider signing this petition regarding restoring free access to the ACM digital library: www.ipetitions.com/petition/res...
ipetitions.com
Petition Restore Fully Free and Open Access to the ACM Digital Library
Restore Fully Free and Open Access to the ACM Digital Library
087
Reposted by Marcel Keller
Sabine Oechsner @proofnerd.bsky.social · 02/01/2026
Deadline is January 7. Still a few days left to apply...
022
Marcel Keller @mkskeller.bsky.social · 26/12/2025
Privacy issues are unlikely to go away in 2026. www.theguardian.com/world/2025/d...
theguardian.com
‘All brakes are off’: Russia’s attempt to rein in illicit market for leaked data backfires
Russian state has tolerated parallel probiv market for its convenience but now Ukrainian spies are exploiting it
000
Marcel Keller @mkskeller.bsky.social · 24/12/2025
The latest version of MP-SPDZ can predict the communication cost when compiling high-level code. github.com/data61/MP-SP...
github.com
Release Expected communication cost in compiler · data61/MP-SPDZ
Expected communication cost in compiler Semi-honest option of Rep4 Reduced communication for preprocessing in Dealer protocol Option of choosing SoftSpoken parameter at run-time BERT functionality ...
020
Reposted by Marcel Keller
Nigel Smart @smartcryptology.bsky.social · 19/12/2025
Fully robust MPC protocol over Galois Rings, executing a TFHE DKG protocol amongst 13 parties, taking 55 hours, with 10.5 Terabytes of data sent per party.... www.zama.org/post/decentr...
zama.org
Decentralized Key Generation for Zama Mainnet Has Successfully Completed
The Decentralized Key Generation (DKG) ceremony for the Zama mainnet has completed successfully.
1102