Tim Ruffing

@real_or_random

serious cryptography

keys.openpgp.org/vks/v1/by-fing…

somewhere on secp256k1 github.com/real-or-random Joined February 2014

1.9K Following 6.7K Followers 5.9K Posts

Latest posts 5

Tim Ruffing @real_or_random Oct 7, 2024

🎉🎉🎉Finally! MuSig2 was merged into libsecp256k1, almost 5 years after the publication of the first paper draft. 🎉🎉🎉

Jonas Nick Verified account @n1ckler Oct 7, 2024

The MuSig2 🎶 module has been merged into libsecp256k1.

This marks significant progress in the real-world deployment of MuSig2 as it'll be available to all existing projects using libsecp256k1 with the next release.

Example usage:
github.com/bitcoin-core/s…

The module has been designed to be as safe to use as possible. We give two rules that, when followed by the implementer, prevent nonce reuse.

333 review comments since it was merged into libsecp256k1-zkp (no significant security issue was found). Thanks to reviewers @real_or_random @theStack @pwuille @josibake @siv2r @kixunil @realtbast ‼️

Docs:
github.com/bitcoin-core/s…
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Tim Ruffing @real_or_random Sep 18, 2024

It appears that German law enforcement agencies have performed successful timing analysis attacks against Tor users.

ndr.de/fernsehen/send…

www.ndr.de Investigations in the so-called darknet: Law enforcement agencies undermine Tor anonymisation The Tor network is considered the most important tool for surfing the internet anonymously. Law enforcement agencies have apparently begun to infiltrate it in order to expose criminals. They have...

Tim Ruffing @real_or_random Mar 5, 2024

🎉🎉🎉 libsecp256k1-zkp now has an experimental module for "half-aggregation" of Schnorr signatures. github.com/BlockstreamRes…

Big shout out to Benedikt Wagner who contributed the code! benedikt-wagner.dev

github.com Schnorr (Incremental) Half Aggregation by b-wagn · Pull Request #261 · BlockstreamResearch/secp25... Revisited PR #130 by @jonasnick. I am happy to hear your thoughts. Summary of changes compared to #130: Address comments from @rustyrussell Use tagged hash Compute hashes with common prefix by cop...

Tim Ruffing @real_or_random Dec 4, 2023

Vim is wonderful. I use it whenever I broke my @emacs config and need to fix it.

Tim Ruffing @real_or_random Dec 1, 2023

We've just made signature verification in libsecp256k1 on x86_64 more than 10% faster.

How? With a trivial PR that removes over 500 lines of assembly code. Compilers have improved a lot over the years.

github.com/bitcoin-core/s… h/t @theStack for the benchmarks.