Michele Orrù
@tumbolia.bsky.social
A curious child. https://michele.orru.net
the super secret project i've been working on the past year is out
Andy Greenberg@agreenberg.bsky.social · 2mo agoDevelopers from Signal (including its protocol's co-creator) along with Microsoft and Harvard unveil Encrypted Spaces, an open-source codebase for a new generation of private collaboration apps. Think Slack, Discord, Google Docs, all end-to-end encrypted. www.wired.com/story/signal...
Our work on sigma-rs and credentials was accepted to USENIX 2026! Huge thanks to my co-authors, the @torproject.org and @ooni.org communities for the real-world problems, feedback, and inspiration that shaped it. With pq-privacy is solved, the next step is post-quantum soundness. ia.cr/2026/794
Went to Tsinghua, Peking, IETF 125 to talk about cryptography. Striking how technology is embedded in daily life. Chinese students are fantastic.
Got invited to @college-de-france.fr for a seminar about zero-knowledge and online anonymity! 🎉🎉🎉 www.college-de-france.fr/fr/agenda/se...
Thrilled to announce that my latest paper with Alessandro Chiesa has been accepted to TCC, the IACR conference on the theory of cryptography!
I'll present my latest paper on anonymous credentials and designated-verifier kzg at ACM CCS 2025 in Taipei!
Phrack #72 release reveals TTPs, backdoors and targets of a Chinese/North Korean state actor mimicking Kimsuky A copy of his workstation is available for all researchers to analyze! Article: data.ddosecrets.com/APT%20Down%2... Data dump: ddosecrets.com/article/apt-...
APT Down - The North Korea Files - Distributed Denial of Secrets
Approximately 9 GB of files exfiltrated from a North Korean threat actor's computer. The data is being released alongside Phrack, and South Korean victims were notified prior to publication. Resear...
ddosecrets.com
With Tom Lehrer's passing, I suppose this is a moment to share the story of the prank he played on the National Security Agency, and how it went undiscovered for nearly 60 years.
Yesterday, @cathie.bsky.social gave a great talk at @ietf.org 123 on the importance of standardizing Sigma protocols and our ongoing work toward a standard for zero-knowledge proofs! You can watch the talk here:
IETF 123: Crypto Forum (CFRG) 2025-07-24 15:00
YouTube video by IETF - Internet Engineering Task Force
youtube.com
We updated our paper on Fiat-Shamir! We now take a closer look at the gap between what symmetric cryptography has focused on for over 10 years (indifferentiability) and what is actually needed for the soundness of ZKPs and SNARKs (something stronger!). eprint.iacr.org/2025/536
A Fiat–Shamir Transformation From Duplex Sponges
We analyze a variant of the Fiat–Shamir transformation based on an ideal permutation. The transformation relies on the popular duplex sponge paradigm, and minimizes the number of calls to the permutat...
eprint.iacr.org
On the Concrete Security of BBS/BBS+ Signatures (Rutchathon Chairattana-Apirom, Stefano Tessaro) ia.cr/2025/1093
I'm happy to finally open-source lattirust, a library for lattice-based zero-knowledge/succinct arguments! Lattirust is somewhat like arkworks, but for lattices; and like lattigo, but for arguments. ➔ github.com/lattirust
lattirust
Lattice zero-knowledge/succinct arguments, and more - lattirust
github.com
so there's two nexus that do AI now, one is the world library and the other the world computer. here's the old one github.com/nexus-stc/stc
GitHub - nexus-stc/stc: Distributed free search engine and AI tools that grant access to knowledge
Distributed free search engine and AI tools that grant access to knowledge - nexus-stc/stc
github.com
Our paper "Beyond the Circuit" was accepted at IACR's Communications in Cryptology! It contains a few simple protocols for simplifying foreign arithmetic in zero-knowledge proofs. Formally we introduce "Σ-reductions", a mix of "Σ-protocols" and "reductions of knowledge". 🗞️ cic.iacr.org/p/2/1/23/pdf
How to protect the OONI dataset from attacks, while preserving the privacy of OONI Probe users? In our latest blog post, we outline some of the key requirements for OONI's anonymous credential system: ooni.org/post/2025-re... #AnonymousCredentials #ooniprobe #ooni
Tomorrow I will venture outside research comfort zone to talk at the IETF about standardizing Fiat-Shamir and Σ-protocols. You can check out my slides here datatracker.ietf.org/meeting/122/...
Went to a meeting where they told me the Force cannot be double-spent and it made a lot of sense
you're welcome, academics \newcommand{\promptinject}[1]{{\tiny\color{white} #1}}
I have updated my work on keyed-verification anonymous credentials, which is now 80 pages long and single authored. May it rest in peace 🪦 eprint.iacr.org/2024/1552.pdf
eprint.iacr.org
did a small blog post introducing anonymous credentials on OONI, a tool that measures censorship across the globe 💅
Probe Security Without Identification
An overview of the current literature on anonymous credentials and how we will be designing and implementing an anonymous credential system for use in OONI Probe.
ooni.org
Thrilled to be emerging from my research cave for a trip around Asia 🇸🇬 Singapore (17-22 Feb) NUS 🇹🇼 Taipei (22 Feb - 8 Mar) RigthsCon, Community Privacy Residency Are friends around?
