Thank you to my co-maintainers, all contributors, and everyone who provided feedback over the years. It was an honor to serve in this role, and I greatly enjoyed it. secp256k1 has a strong group of people reviewing and contributing code. I’m glad to see it in good hands.

A written version of my recent @OPNEXT2026 talk, with extra details and references. It covers SHRINCS/SHRIMPS, the design space of post-quantum signatures for Bitcoin (especially hash-based ones), and a toy proposal for OP_CHECKSPHINCS.

Jonas Nick (@n1ckler) joined a technical panel on the open source stage at Bitcoin 2026 to discuss post-quantum signature schemes for Bitcoin, sharing why @blksresearch has been exploring hash-based signatures as the safer path forward.

Another year and another chance to get your paper awarded The Bitcoin Research Prize 🏆 Join previous winners like @n1ckler, @real_or_random, @robin_linus and @chelseakomlo in the the hall of fame. Be shameless, nominations are anonymous.

Last week at @OPNEXT2026 I presented a toy proposal for hash-based sigs in Bitcoin (incl. SHRINCS). Open questions: • What are acceptable sign/verify costs? Higher → smaller sigs • How to design safe stateful setups? • Optimizations beyond SHRINCS? • L2s and stateful sigs?

This is a fantastic idea. 4.2× faster SLH-DSA compatible signing while reducing the signature budget to 2^48. No verifier changes required. Or, if you prefer: ~500× faster key generation. Way more than just a hack. And a great writeup.

Tagging major wallets: @TrustWallet @bitcoincom @Blockchain @exodus @BTCCexchange @GuardaWallet @edgewallet @CoinomiWallet 1. Will you support quantum-safe Bitcoin addresses if they are standardized? 2. How much would you like to participate in building PQ standards?

I've been working on a post-quantum cryptography registry/wiki and it's now live. If you're an engineer trying to evaluate PQC algorithms side by side, you have to piece together information from FIPS documents, ePrint papers, mailing list threads, and scattered READMEs. There are some existing resources out there for parameter sets but I wanted something that goes much further and includes everything; algorithm descriptions, use case and feature filtering, benchmarks, implementation references, and wiki-style prose all in one place with a consistent schema. So that's what this is. It covers nine algorithms today; the NIST standards (ML-KEM, ML-DSA, SLH-DSA), the NIST pipeline (FN-DSA, HQC), blockchain-specific schemes (SHRINCS, SHRIMPS, leanSig), and XMSS. There are a lot more I want to add and the registry is open source so contributions are welcome.

Google Quantum AI released a paper exploring quantum threats to cryptocurrency, citing Blockstream Research work on post-quantum cryptography. Here’s what we’re building to prepare Bitcoin for quantum computers, using @Liquid_BTC as a production-grade sidechain and prove upgrades before they are considered for Bitcoin mainnet. 🧵

We just published "Hash-based signatures for Bitcoin," a new analysis of post-quantum schemes by @kudinov_mikhail and myself at @blksresearch. This paper serves as a gentle intro to hash-based schemes and explores how to optimize them specifically for application in Bitcoin. 🧵