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Ed SuominenDear <a href="https://hachyderm.io/tags/Signal" class="mention hashtag" rel="nofollow noopener" target="_blank">#Signal</a> devs, I have had it up to fucking here with your constant updates of an app that is 100x bigger than it really needs to be.Public key <a href="https://hachyderm.io/tags/cryptography" class="mention hashtag" rel="nofollow noopener" target="_blank">#cryptography</a> was figured out over twenty years ago. What do you keep getting wrong about it that requires changing every couple of weeks?

Jan :rust: :ferris:<a href="https://mas.to/@mroach" class="u-url mention" rel="nofollow noopener" target="_blank">@mroach</a> <a href="https://twit.social/@MisuseCase" class="u-url mention" rel="nofollow noopener" target="_blank">@MisuseCase</a> <a href="https://furry.engineer/@fluffykittycat" class="u-url mention" rel="nofollow noopener" target="_blank">@fluffykittycat</a> <a href="https://mastodon.social/@eff" class="u-url mention" rel="nofollow noopener" target="_blank">@eff</a> The thing is: there _are_ better solutions out there to verify age online without compromising <a href="https://floss.social/tags/privacy" class="mention hashtag" rel="nofollow noopener" target="_blank">#privacy</a> (and I'm disappointed by the <a href="https://floss.social/tags/EFF" class="mention hashtag" rel="nofollow noopener" target="_blank">#EFF</a> complaining, but not proposing alternative solutions).Sometimes <a href="https://floss.social/tags/Math" class="mention hashtag" rel="nofollow noopener" target="_blank">#Math</a> can help ¯\_(ツ)_/¯Opening up ‘Zero-Knowledge Proof’ technology to promote privacy in age assurance (Google, July 2025):<a href="https://blog.google/technology/safety-security/opening-up-zero-knowledge-proof-technology-to-promote-privacy-in-age-assurance/" rel="nofollow noopener" translate="no" target="_blank">https://blog.google/technology/safety-security/opening-up-zero-knowledge-proof-technology-to-promote-privacy-in-age-assurance/</a><a href="https://floss.social/tags/ZeroKnowledgeProof" class="mention hashtag" rel="nofollow noopener" target="_blank">#ZeroKnowledgeProof</a> <a href="https://floss.social/tags/Cryptography" class="mention hashtag" rel="nofollow noopener" target="_blank">#Cryptography</a>

NickDo <a href="https://mathstodon.xyz/tags/Apple" class="mention hashtag" rel="nofollow noopener" target="_blank">#Apple</a> folks out there at least know whether Messages (a.k.a. iMessage) on <a href="https://mathstodon.xyz/tags/iOS" class="mention hashtag" rel="nofollow noopener" target="_blank">#iOS</a> uses one of the above mentioned methods to provide end-to-end encryption of the content of push notifications (which in general contain portions of messages)? I know that the messages themselves are end-to-end encrypted, I'm specifically asking about the content of the notifications.<a href="https://mathstodon.xyz/tags/privacy" class="mention hashtag" rel="nofollow noopener" target="_blank">#privacy</a> <a href="https://mathstodon.xyz/tags/cryptography" class="mention hashtag" rel="nofollow noopener" target="_blank">#cryptography</a> <a href="https://mathstodon.xyz/tags/infosec" class="mention hashtag" rel="nofollow noopener" target="_blank">#infosec</a>

OCTADEI'm looking for more <a href="https://soc.octade.net?t=cryptology" class="mention hashtag" rel="nofollow noopener" target="_blank">#cryptology</a> and <a href="https://soc.octade.net?t=cryptography" class="mention hashtag" rel="nofollow noopener" target="_blank">#cryptography</a> related profiles to follow. Recommends appreciated.

Miguel Afonso CaetanoWelcome to the website for the Applied Cryptography course at the American University of Beirut! This page serves as a unified and self-sufficient source of truth on everything concerning your course. (...) Course Description: Applied Cryptography explores the core theory of modern cryptography and how to apply these fundamental principles to build and analyze real-world secure systems. We start with foundational concepts—such as Kerckhoff's Principle, computational hardness, and provable security—before moving on to key cryptographic primitives like pseudorandom generators, block ciphers, and hash functions. Building on this solid groundwork, we will survey how these technologies power critical real-world deployments such as TLS, secure messaging protocols (e.g., Signal), and post-quantum cryptography. We will also delve into specialized topics like high-assurance cryptographic implementations, elliptic-curve-based systems, and zero-knowledge proofs to give you a complete understanding of contemporary cryptography's scope and impact. By the end of the semester, you will have gained both a rigorous theoretical perspective and practical hands-on experience, enabling you to evaluate, design, and implement cryptographic solutions." <a href="https://appliedcryptography.page" rel="nofollow noopener" translate="no" target="_blank">https://appliedcryptography.page</a><a href="https://tldr.nettime.org/tags/CyberSecurity" class="mention hashtag" rel="nofollow noopener" target="_blank">#CyberSecurity</a> <a href="https://tldr.nettime.org/tags/Encryption" class="mention hashtag" rel="nofollow noopener" target="_blank">#Encryption</a> <a href="https://tldr.nettime.org/tags/Privacy" class="mention hashtag" rel="nofollow noopener" target="_blank">#Privacy</a> <a href="https://tldr.nettime.org/tags/Cryptography" class="mention hashtag" rel="nofollow noopener" target="_blank">#Cryptography</a> <a href="https://tldr.nettime.org/tags/QuantumComputing" class="mention hashtag" rel="nofollow noopener" target="_blank">#QuantumComputing</a>

Tommaso GagliardoniI emailed italian politicians about the EU's "ChatControl" proposal. Here I include email addresses and templates (in Italian) for my fellow Italians who want to help.<a href="https://gagliardoni.net/#20250805_chatcontrol" rel="nofollow noopener" translate="no" target="_blank">https://gagliardoni.net/#20250805_chatcontrol</a><a href="https://infosec.exchange/tags/eu" class="mention hashtag" rel="nofollow noopener" target="_blank">#eu</a> <a href="https://infosec.exchange/tags/CSA" class="mention hashtag" rel="nofollow noopener" target="_blank">#CSA</a> <a href="https://infosec.exchange/tags/CSAM" class="mention hashtag" rel="nofollow noopener" target="_blank">#CSAM</a> <a href="https://infosec.exchange/tags/ChatControl" class="mention hashtag" rel="nofollow noopener" target="_blank">#ChatControl</a> <a href="https://infosec.exchange/tags/privacy" class="mention hashtag" rel="nofollow noopener" target="_blank">#privacy</a> <a href="https://infosec.exchange/tags/security" class="mention hashtag" rel="nofollow noopener" target="_blank">#security</a> <a href="https://infosec.exchange/tags/surveillance" class="mention hashtag" rel="nofollow noopener" target="_blank">#surveillance</a> <a href="https://infosec.exchange/tags/authoritarianism" class="mention hashtag" rel="nofollow noopener" target="_blank">#authoritarianism</a> <a href="https://infosec.exchange/tags/crypto" class="mention hashtag" rel="nofollow noopener" target="_blank">#crypto</a> <a href="https://infosec.exchange/tags/cryptography" class="mention hashtag" rel="nofollow noopener" target="_blank">#cryptography</a> <a href="https://infosec.exchange/tags/civilrights" class="mention hashtag" rel="nofollow noopener" target="_blank">#civilrights</a>

Aaron Toponce ⚛️:debian:After typing up my <a href="https://fosstodon.org/tags/JavaScript" class="mention hashtag" rel="nofollow noopener" target="_blank">#JavaScript</a> TRNG* with von Neumann's randomness extractor, I revisited my curiosity to see if I can improve its efficiency. von Neumann throws out a lot of bits, likely including quality entropy.My intuition was to pool the discarded bits and iterate over those again, perhaps with XOR. Turns out my intuition wasn't far off.<a href="https://gist.github.com/atoponce/0a659da0ab53b093629c4facb32e9547" rel="nofollow noopener" translate="no" target="_blank">https://gist.github.com/atoponce/0a659da0ab53b093629c4facb32e9547</a>* Software CAN produce information theoretic entropy. Stating otherwise is a bad meme that needs to die.<a href="https://fosstodon.org/tags/Cryptography" class="mention hashtag" rel="nofollow noopener" target="_blank">#Cryptography</a> <a href="https://fosstodon.org/tags/crypto" class="mention hashtag" rel="nofollow noopener" target="_blank">#crypto</a>

Tommaso GagliardoniThe war on crypto never ends. The war on privacy, civil rights, security and freedom of speech never ends.This time we are dangerously close to lose. The "Child Sexual Abuse" (CSA) EU regulation proposal, more aptly nicknamed "ChatControl", will be voted AGAIN this October, and many countries who opposed it last year are now undecided. The proposal at its roots aims at allowing authorities to break end-to-end encryption for the usual reason: "because of the children". As a father of two, I am disgusted by this recurring, cheap rhetoric.What you can do: <a href="https://www.patrick-breyer.de/en/posts/chat-control/#WhatYouCanDo" rel="nofollow noopener" translate="no" target="_blank">https://www.patrick-breyer.de/en/posts/chat-control/#WhatYouCanDo</a><a href="https://infosec.exchange/tags/eu" class="mention hashtag" rel="nofollow noopener" target="_blank">#eu</a> <a href="https://infosec.exchange/tags/CSA" class="mention hashtag" rel="nofollow noopener" target="_blank">#CSA</a> <a href="https://infosec.exchange/tags/CSAM" class="mention hashtag" rel="nofollow noopener" target="_blank">#CSAM</a> <a href="https://infosec.exchange/tags/ChatControl" class="mention hashtag" rel="nofollow noopener" target="_blank">#ChatControl</a> <a href="https://infosec.exchange/tags/privacy" class="mention hashtag" rel="nofollow noopener" target="_blank">#privacy</a> <a href="https://infosec.exchange/tags/security" class="mention hashtag" rel="nofollow noopener" target="_blank">#security</a> <a href="https://infosec.exchange/tags/surveillance" class="mention hashtag" rel="nofollow noopener" target="_blank">#surveillance</a> <a href="https://infosec.exchange/tags/authoritarianism" class="mention hashtag" rel="nofollow noopener" target="_blank">#authoritarianism</a> <a href="https://infosec.exchange/tags/crypto" class="mention hashtag" rel="nofollow noopener" target="_blank">#crypto</a> <a href="https://infosec.exchange/tags/cryptography" class="mention hashtag" rel="nofollow noopener" target="_blank">#cryptography</a> <a href="https://infosec.exchange/tags/civilrights" class="mention hashtag" rel="nofollow noopener" target="_blank">#civilrights</a>

ltningWhy on earth was the <a class="hashtag" href="https://pleroma.anduin.net/tag/activitypub" rel="nofollow noopener" target="_blank">#ActivityPub</a> protocol even let out the door without a well-specified and mandatory graceful, non-destructive key rotation scheme?Yes I know the privacy issues. Those are not valid reasons to not have such a mechanism; it's a valid reason to not enable or use one.What we're stuck with now is a ton of instances with absurdly long, legacy-algorithm keys (RSA-4096) with no way to replace them with shorter/better keys without effectively losing everything ever posted on the instance.The protocol is only 7 years old! EC crypto was well-established at the time, and should have been the default.And what happens once everyone has to replace the keys, because RSA is broken by quantum computers (I know, probably 100 years to go)? The <a class="hashtag" href="https://pleroma.anduin.net/tag/fediverse" rel="nofollow noopener" target="_blank">#Fediverse</a> will be a wasteland, with no instances trusting anything from any other instance, so all <a class="hashtag" href="https://pleroma.anduin.net/tag/federation" rel="nofollow noopener" target="_blank">#Federation</a> breaks down.Sorry if I got some details wrong about what the protocol says. If I get flamed to death for being wrong, then I'll consider that a Good Thing(TM). I've been trying to find a way to rotate/replace keys for a while and all my searching turns up is either 1) confirmation that most people don't know or care about cryptography, or 2) <a href="https://socialhub.activitypub.rocks/t/key-rotation-notification/562" rel="nofollow noopener" target="_blank">https://socialhub.activitypub.rocks/t/key-rotation-notification/562</a> - which really isn't helpful.If it is possible to gracefully rotate the key(s) of an instance/user, there really has to exist some documentation that explains clearly how to implement this in a server and how to exercise it as a server operator.<a class="hashtag" href="https://pleroma.anduin.net/tag/cryptography" rel="nofollow noopener" target="_blank">#Cryptography</a> <a class="hashtag" href="https://pleroma.anduin.net/tag/rant" rel="nofollow noopener" target="_blank">#Rant</a> <a class="hashtag" href="https://pleroma.anduin.net/tag/mastodon" rel="nofollow noopener" target="_blank">#Mastodon</a>

Aaron Toponce ⚛️:debian:I'm reading the paper by Bruce Schneier and Niels Ferguson on the Fortuna CSPRNG from 2003.You can read it here: <a href="https://www.schneier.com/wp-content/uploads/2015/12/fortuna.pdf" rel="nofollow noopener" translate="no" target="_blank">https://www.schneier.com/wp-content/uploads/2015/12/fortuna.pdf</a>Note the highlighted section. This describes precisely fast key erasure that Daniel J. Bernstein describes in his 2017 blog post: <a href="https://blog.cr.yp.to/20170723-random.html" rel="nofollow noopener" translate="no" target="_blank">https://blog.cr.yp.to/20170723-random.html</a><a href="https://fosstodon.org/tags/crypto" class="mention hashtag" rel="nofollow noopener" target="_blank">#crypto</a> <a href="https://fosstodon.org/tags/Cryptography" class="mention hashtag" rel="nofollow noopener" target="_blank">#Cryptography</a>

The New Oil<a href="https://mastodon.thenewoil.org/tags/Cryptomator" class="mention hashtag" rel="nofollow noopener" target="_blank">#Cryptomator</a>: Our Roadmap to Post-Quantum <a href="https://mastodon.thenewoil.org/tags/Cryptography" class="mention hashtag" rel="nofollow noopener" target="_blank">#Cryptography</a><a href="https://cryptomator.org/blog/2025/07/24/post-quantum-roadmap/" rel="nofollow noopener" translate="no" target="_blank">https://cryptomator.org/blog/2025/07/24/post-quantum-roadmap/</a><a href="https://mastodon.thenewoil.org/tags/FOSS" class="mention hashtag" rel="nofollow noopener" target="_blank">#FOSS</a> <a href="https://mastodon.thenewoil.org/tags/cybersecurity" class="mention hashtag" rel="nofollow noopener" target="_blank">#cybersecurity</a> <a href="https://mastodon.thenewoil.org/tags/PQC" class="mention hashtag" rel="nofollow noopener" target="_blank">#PQC</a>

Bob 🇨🇦🇲🇽🇺🇦<a href="https://www.quantamagazine.org/quantum-scientists-have-built-a-new-math-of-cryptography-20250725/" rel="nofollow noopener" translate="no" target="_blank">https://www.quantamagazine.org/quantum-scientists-have-built-a-new-math-of-cryptography-20250725/</a><a href="https://infosec.exchange/tags/cryptography" class="mention hashtag" rel="nofollow noopener" target="_blank">#cryptography</a> <a href="https://infosec.exchange/tags/encryption" class="mention hashtag" rel="nofollow noopener" target="_blank">#encryption</a>

TechnoTenshi :verified_trans: :Fire_Lesbian:A new proof shows quantum cryptography can be built on problems even harder than NP, offering security beyond classical encryption. Researchers introduced "one-way puzzles" to replace traditional cryptographic foundations.<a href="https://www.quantamagazine.org/quantum-scientists-have-built-a-new-math-of-cryptography-20250725/" rel="nofollow noopener" translate="no" target="_blank">https://www.quantamagazine.org/quantum-scientists-have-built-a-new-math-of-cryptography-20250725/</a><a href="https://infosec.exchange/tags/QuantumComputing" class="mention hashtag" rel="nofollow noopener" target="_blank">#QuantumComputing</a> <a href="https://infosec.exchange/tags/Cryptography" class="mention hashtag" rel="nofollow noopener" target="_blank">#Cryptography</a> <a href="https://infosec.exchange/tags/Infosec" class="mention hashtag" rel="nofollow noopener" target="_blank">#Infosec</a> <a href="https://infosec.exchange/tags/PostQuantum" class="mention hashtag" rel="nofollow noopener" target="_blank">#PostQuantum</a>

Aaron Toponce ⚛️:debian:I finally finished by browser-based randomness nonsense. Let me know what you think.<a href="https://atoponce.github.io" rel="nofollow noopener" translate="no" target="_blank">https://atoponce.github.io</a><a href="https://fosstodon.org/tags/crypto" class="mention hashtag" rel="nofollow noopener" target="_blank">#crypto</a> <a href="https://fosstodon.org/tags/cryptography" class="mention hashtag" rel="nofollow noopener" target="_blank">#cryptography</a> <a href="https://fosstodon.org/tags/passwords" class="mention hashtag" rel="nofollow noopener" target="_blank">#passwords</a>

Tony “Abolish ICE” Arcieri🌹🦀Replication of Quantum Factorisation Records with an 8-bit Home Computer, an Abacus, and a Dog: a snarky take on how unimpressive these records actually are<a href="https://eprint.iacr.org/2025/1237.pdf" rel="nofollow noopener" translate="no" target="_blank">https://eprint.iacr.org/2025/1237.pdf</a><a href="https://mas.to/tags/cryptography" class="mention hashtag" rel="nofollow noopener" target="_blank">#cryptography</a>

Risotto Biasis it weird that "I built a toy cryptography system" is treated sooo much worse compared to "I built a hobby kernel", or "I built a toy DB" or "I built an orchestrator for my home lab"? I've seen people be like "just use postgres/sqlite", sure - but that's different from "[clutches pearls], No SQL? How dare you. Perish the thought! It's not ACID! How will we ever... Never use this in production. Microkernels? They'll never be practical!"<a href="https://toot.risottobias.org/tags/cryptography" class="mention hashtag" rel="nofollow noopener" target="_blank">#cryptography</a> <a href="https://toot.risottobias.org/tags/cybersecurity" class="mention hashtag" rel="nofollow noopener" target="_blank">#cybersecurity</a>

Stéphane Bortzmeyer"Selfie attack"? It really exists?<a href="https://mastodon.gougere.fr/tags/cryptography" class="mention hashtag" rel="nofollow noopener" target="_blank">#cryptography</a> <a href="https://mastodon.gougere.fr/tags/IETF123" class="mention hashtag" rel="nofollow noopener" target="_blank">#IETF123</a>

the magnificent rhysApropos nothing, Daniel Bernstein's post from earlier in the year on the viability of quantum computing.<a href="https://mastodon.rhys.wtf/tags/quantum" class="mention hashtag" rel="nofollow noopener" target="_blank">#quantum</a> <a href="https://mastodon.rhys.wtf/tags/PQC" class="mention hashtag" rel="nofollow noopener" target="_blank">#PQC</a> <a href="https://mastodon.rhys.wtf/tags/cryptography" class="mention hashtag" rel="nofollow noopener" target="_blank">#cryptography</a> <a href="https://blog.cr.yp.to/20250118-flight.html" rel="nofollow noopener" translate="no" target="_blank">https://blog.cr.yp.to/20250118-flight.html</a>

Preston Maness ☭<a href="https://mstdn.social/@rebeccawatson" class="u-url mention" rel="nofollow noopener" target="_blank">@rebeccawatson</a> There actually *are* ways of performing age verification in a privacy-preserving way, thanks to zero-knowledge proof cryptography:<a href="https://github.com/zkpassport" rel="nofollow noopener" translate="no" target="_blank">https://github.com/zkpassport</a>StRanGeLY tHoUgH, governments don't seem interested in merely knowing that a user truly is >=$some_age, and not knowing anything else about them. They really, *really* wanna know who the perverts^W adults are.<a href="https://tenforward.social/tags/zkp" class="mention hashtag" rel="nofollow noopener" target="_blank">#zkp</a> <a href="https://tenforward.social/tags/zkproof" class="mention hashtag" rel="nofollow noopener" target="_blank">#zkproof</a> <a href="https://tenforward.social/tags/cryptography" class="mention hashtag" rel="nofollow noopener" target="_blank">#cryptography</a> <a href="https://tenforward.social/tags/cryptology" class="mention hashtag" rel="nofollow noopener" target="_blank">#cryptology</a>

US<a href="https://www.europesays.com/us/71486/" rel="nofollow noopener" translate="no" target="_blank">https://www.europesays.com/us/71486/</a> “Unlocking a Cosmic Code”: Alien Math Language Reveals Secrets of the Universe in This Groundbreaking 320-Page Report by Top Scientists <a href="https://pubeurope.com/tags/Cryptography" class="mention hashtag" rel="nofollow noopener" target="_blank">#Cryptography</a> <a href="https://pubeurope.com/tags/MathematicalDiscovery" class="mention hashtag" rel="nofollow noopener" target="_blank">#MathematicalDiscovery</a> <a href="https://pubeurope.com/tags/Science" class="mention hashtag" rel="nofollow noopener" target="_blank">#Science</a> <a href="https://pubeurope.com/tags/Space" class="mention hashtag" rel="nofollow noopener" target="_blank">#Space</a> <a href="https://pubeurope.com/tags/TheoreticalPhysics" class="mention hashtag" rel="nofollow noopener" target="_blank">#TheoreticalPhysics</a> <a href="https://pubeurope.com/tags/UnitedStates" class="mention hashtag" rel="nofollow noopener" target="_blank">#UnitedStates</a> <a href="https://pubeurope.com/tags/UnitedStates" class="mention hashtag" rel="nofollow noopener" target="_blank">#UnitedStates</a> <a href="https://pubeurope.com/tags/US" class="mention hashtag" rel="nofollow noopener" target="_blank">#US</a>

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