Dear Journalists, That "crosshair" you're referring to is a Celtic cross, a well-known white supremacist logo: en.wikipedia.org/wiki/Celtic_... www.adl.org/sites/defaul... This is what these rioters are: white supremacists.

Security in Times of Surveillance eipsi.win.tue.nl/surveillance... w Marrtin Albrecht @malb.bsky.social Chloé Berthélémy (EDRi), Rikke Bjerg Jensen (RHUL), Thomas Lohninger @socialhack.bsky.social Björn Ruytenberg @0xiphorus.infosec.exchange.ap.brid.gy Carmela Troncoso @carmelatroncoso.bsky.social

Our statement on the UK gov't's demand that all content on all devices sold or used in the UK be scanned, on the presumption of nudity, using a dystopian combination of age verification & content scanning. This proposal will not safeguard children. It endangers us all. signal.org/blog/pdfs/20...

Leiden Declaration on Artificial Intelligence and Mathematics leidendeclaration.ai#declaration

arstechnica.com/security/202... with a quote by @bedow.bsky.social on how we saw/see no evidence of what they're alleging.

I'm reading some papers on AI safety (don't ask). Is the entire field really so naive that they think speaking of "human values" makes sense? Have these people not switched on the news ever? I know we computer scientists do not excell at thinking about the actual world we live in, but this is extra.

Soooo ePrint blocked the Eurocrypt WiFi for too many requests

Similar to the E2E encryption debates in that nerding harder will not square the policy circle. Dissimilar to the E2E encryption debates in that the policy world is proceeding nonetheless, as @matthewdgreen.bsky.social said at the top.

‘They singled out non-white, foreign-born workers’: the restaurants raided by Britain’s version of ICE www.theguardian.com/uk-news/2026...

Fabio is looking for a PhD student in "Explainable, Knowledge-driven AI and ML for Systems Security" fabio.pierazzi.com/opportunity/...

The program for our Eurocrypt affiliated event CAW on May 10 is (mostly) finalized and published on: caw.cryptanalysis.fun We received many super exciting submissions! To register, select our workshop during conference registration on the Eurocrypt website once that opens: eurocrypt.iacr.org/2026/

[email protected] is looking for an intern: symbolic.software/blog/2026-03...

Not Safe for Politics Cellebrite Used on Kenyan Activist and Politician Boniface Mwangi citizenlab.ca/research/cel...

'deep hanging out' (technical term) #realworldccrypto

"Cryptography is also a social science unaware of itself." #realworldcrypto

Just finished presenting this work at Real World Crypto in Taipei :) TL;DR: We found 2 attacks on Signal (Android, Desktop) where a malicious server can inject messages in conversations. Super fun project! Thanks a bunch to Noemi Terzo, @kennyog.bsky.social, and @cryptojedi.bsky.social

I just donated to help equip Lebanon's first responders and firefighters with essential life-saving supplies to help them deal with the massive crises unfolding due to Israeli attacks on civilian areas. Please consider donating: fundahope.com/en/campaigns...

Fernando is looking for a PhD student www.iacr.org/jobs/item/4164 Fernando is excellent, you should consider applying.

"presenting a cornucopia of practical attacks". These are my favorite words ever to have occurred in a cryptography paper.

A thread in which @sockpuppet.org presents some of the juiciest morsels from our paper at zkae.io :

“Based on these ethnographic findings, we initiate the cryptographic study of at-compromise security” martinralbrecht.wordpress.com/2026/02/17/b...

Hardness of hinted ISIS from the space-time hardness of lattice problems (Martin R. Albrecht, Russell W. F. Lai, Eamonn W. Postlethwaite) ia.cr/2026/187

Apropos of nothing, here's a piece on Reform's plans for a British ICE: shado-mag.com/articles/opi... Here's the policy document: web.archive.org/web/20260127... Here's a piece on the Labour Government's practice of emulating the US' celebration of brutality: www.theguardian.com/politics/202...

This is right. This is the message. This is the urgency. Minneapolis and so many other places are living under paramilitary occupation and tyranny by out of control, unaccountable federal thugs. This cannot stand. www.youtube.com/shorts/hyqtA...

Social Foundations of Cryptography: Autumn School London, UK | 15 to 17 September 2026 social-foundations-of-cryptography.gitlab.io/school

Come work with us! Lecturer (≅ Assistant Professor/Juniorprofessor/Maître de conférences) in Cryptography at King’s College London martinralbrecht.wordpress.com/2026/01/05/l...

There is a lot to be appreciated about someone with an actual humanities education and a capacity to think writing about AGI. www.eruditorumpress.com/blog/on-inco... by @eruditorumpress.com

And now we are famous: www.nytimes.com/2025/11/21/w... - congratulations to all colleagues who made the NYT (both through quotes, by playing a role, or by being on this picture)

Two stories from King's College London: 1/ A student is at risk of losing their visa over their Palestine activism www.cage.ngo/articles/leg... 2/ Equality, Diversity and Inclusion removed from job ads: www.timeshighereducation.com/news/pressur... Does that remind you of anything?

I was today's years old when I realised that "we" give developers an object called the Advanced Encryption Standard which is not an encryption algorithm (but a pseudorandom permutation) and then we are shocked when we encounter yet another ECB mode in the wild. 🙃

Discord user IDs getting leaked is the entirely predictable consequence of requiring platforms to do age verification. That data never goes away, it spreads. In this case, into appeals in a breached customer support database. And predictably, it can get worse. www.404media.co/the-discord-...

So, Discord implemented true ID age verification and this turned into a privacy disaster, am I reading this right? discord.com/press-releas...

Internship Position on the Lattice Estimator martinralbrecht.wordpress.com/2025/08/27/i...

New ethnographic work with @rikkebjerg.bsky.social and @malb.bsky.social on information security in the UK climate movement -- accepted and presented recently at USENIX Security ’25 in Seattle 🌱 www.usenix.org/conference/u...

We are recruiting for at Postdoc Position in Lattice-Based Cryptography at King's College London martinralbrecht.wordpress.com/2025/08/24/p...

11 Sep UK Crypto Day in Manchester: uk-crypto-day.github.io/2025/09/11/u... Together with @rikkebjerg.bsky.social I'll be talking about our upcoming work with @bedow.bsky.social and Simone Colombo: At-Compromise Security: The Case for Alert Blindness

Slides of my talk titled "Lattices give us KEMs and FHE, but where are the efficient lattice PETs? -- By Example of (Verifiable) Oblivious PRFs" given at spiqe-workshop.github.io are here: github.com/malb/talks/b... Thanks @kennyog.bsky.social and @jurajsomorovsky.bsky.social for inviting me.

Wedges, oil, and vinegar – An analysis of UOV in characteristic 2 (Lars Ran) ia.cr/2025/1143

An out-of-schedule update to my quantum landscape chart: sam-jaques.appspot.com/quantum_land..., prompted by @craiggidney.bsky.social 's new paper: arxiv.org/abs/2505.15917. A startling jump (20x) in how easy quantum factoring can be! Also: much improved web design!

New blog post on our (with @rikkebjerg.bsky.social and @mikaelabrough.bsky.social) USENIX'25 paper "On the Virtues of Information Security in the UK Climate Movement" where I end up reflecting on writing this, for me, unusual work. martinralbrecht.wordpress.com/2025/06/14/o...

Eamonn and I received a Zama Cryptanalysis Grant to help with the lattice estimator github.com/malb/lattice.... We hope to hire interns to work on the estimator over two periods over the next 18 months. Zama are still taking applications for this grant, see here: www.zama.ai/post/announc...

10 June: Jean-François Blanchette Talk and Discussion on "Burdens of Proof" in London martinralbrecht.wordpress.com/2025/04/15/1...

Ooh -- also: The "More is Less" paper (eprint.iacr.org/2017/713 ) pointed out this group membership issue with WhatsApp in 2017 -- almost 8 years ago!

Dan wrote a nice thread about our work on WhatsApp presented at Eurocrypt earlier today and discussed in @dangoodin.bsky.social's article linked below.

... who have to constantly monitor the UI for changes to the member list. And it is a burden that is unnecessary: Signal deploys cryptographic control of group membership at scale, for example. Thanks @dangoodin.bsky.social for your coverage of our work in this piece: arstechnica.com/security/202...

How does WhatsApp implement encrypted group chats? And are they secure? @malb.bsky.social, @bedow.bsky.social and myself were keen to figure this out. After two years of reverse-engineering, analysis and a few too many proofs, I presented our work at Eurocrypt earlier today. So, what did we learn?

This is cool heimberger.xyz/oprfs.html

Just about ready to set off to Madrid for #eurocrypt 2025, where I’ll have the great honour of giving the 2025 IACR Distinguished Lecture on Tuesday afternoon. #iacr #cryptography

Formal Analysis of Multi-Device Group Messaging in WhatsApp (Martin R. Albrecht, Benjamin Dowling, Daniel Jones) ia.cr/2025/794

Okay, this is fun github.com/Jacksaur/Gor... I like the DOOM one.