Michele Orrù
@tumbolia.bsky.social
📤 326
📥 123
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A curious child.
https://michele.orru.net
the new dragon book cover is incredible
3 months ago
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Got invited to
@college-de-france.fr
for a seminar about zero-knowledge and online anonymity! 🎉🎉🎉
www.college-de-france.fr/fr/agenda/se...
4 months ago
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Thrilled to announce that my latest paper with Alessandro Chiesa has been accepted to TCC, the IACR conference on the theory of cryptography!
5 months ago
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I'll present my latest paper on anonymous credentials and designated-verifier kzg at ACM CCS 2025 in Taipei!
5 months ago
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Michele Orrù
Saber
5 months ago
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-...
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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...
https://ddosecrets.com/article/apt-down-the-north-korea-files
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Michele Orrù
Opal
6 months ago
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.
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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:
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IETF 123: Crypto Forum (CFRG) 2025-07-24 15:00
YouTube video by IETF - Internet Engineering Task Force
https://www.youtube.com/watch?v=rZEM4HQbtF8&t=4791s
6 months ago
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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
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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...
http://eprint.iacr.org/2025/536
6 months ago
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Michele Orrù
ePrint Updates
7 months ago
On the Concrete Security of BBS/BBS+ Signatures (Rutchathon Chairattana-Apirom,
Stefano Tessaro
)
ia.cr/2025/1093
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Michele Orrù
Christian Knabenhans
8 months ago
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
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lattirust
Lattice zero-knowledge/succinct arguments, and more - lattirust
https://github.com/lattirust
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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
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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
https://github.com/nexus-stc/stc
8 months ago
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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
9 months ago
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Michele Orrù
OONI
10 months ago
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
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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/...
10 months ago
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Went to a meeting where they told me the Force cannot be double-spent and it made a lot of sense
10 months ago
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knowledge and feelings
11 months ago
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you're welcome, academics \newcommand{\promptinject}[1]{{\tiny\color{white} #1}}
11 months ago
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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
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https://eprint.iacr.org/2024/1552.pdf
11 months ago
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It’s telling me something
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11 months ago
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did a small blog post introducing anonymous credentials on OONI, a tool that measures censorship across the globe 💅
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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.
https://ooni.org/post/2025-probe-security-without-identification/
11 months ago
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credential designers and identity-fluid users
11 months ago
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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?
11 months ago
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