Blockstream Research

Announcing DahLIAS! 🎉 The first crypto protocol for full cross-input signature aggregation that allows reusing Bitcoin's curve secp256k1. ✅ 64B sigs ✅ Verify is ~2x faster than half-agg'd Schnorr sigs ✅ 2-round signing Kudos to the team: @real_or_random @yannickseurin! 👇

Users can now protect their Liquid Bitcoin and issued assets against future quantum computer attacks. @blksresearch has deployed post-quantum signature verification on the @Liquid_BTC Network using Simplicity - a first on a production Bitcoin sidechain. Opt-in quantum protection, available today. No consensus changes required.

ANNOUNCING the MAIN STAGE lineup for @OPNEXT2026 Our lineup features capstone presentations on Bitcoin's future from the leading voices in Bitcoin technical & investor circles. @robin_linus × @idealgroup @bitschmidty × @bitcoinoptech × @bitcoinbrink @hash_bender × @luxor @n1ckler × @Blockstream @darosior × @ChaincodeLabs @apruden08 × @projecteleven @DavidDuong × @CoinbaseInsto × @coinbase @robbiemitchnick × @BlackRock Don't wait to get your ticket (link below)👇

Tomorrow call #2 github.com/ethereum/pm/is…

Toby Sharp, Chris Hyunhum Cho, Jonas Nick (@n1ckler), and Antoine Poinsot (@darosior) joined Optech to discuss Newsletter #391: News ● A constant-time parallelized UTXO database (25:40) ● Bithoven: A formally verified, imperative language for Bitcoin Script (44:48) ● Discussion of dust attack mitigations (1:43:33) Changing consensus ● SHRINCS: 324-byte stateful post-quantum signatures with static backups (1:30) ● Addressing remaining points on BIP54 (1:10:08) ● Falcon post-quantum signature scheme proposal (20:05) ● SLH-DSA verification can compete with ECC (23:28) Releases and release candidates ● LDK 0.1.9 (1:50:27) Notable code and documentation changes ● Bitcoin Core #33604 (1:53:10) ● Bitcoin Core #34358 (1:54:58) ● Core Lightning #8824 (1:56:20) ● Eclair #3244 (1:58:17) ● LDK #4263 (2:00:07) ● LDK #4300 (2:01:54) ● LND #10473 (2:03:57) ● Rust Bitcoin #5493 (2:07:36)

Andrew Poelstra of @blksresearch breaks down Shielded CSV: a model in development by Blockstream Cryptography Lead @n1ckler where blockchain validation gets flipped. Users verify coin history themselves. The chain becomes an ordering layer, not an execution engine.

We're thrilled to announce OPNEXT speaker @n1ckler, researcher at @Blockstream! His Bitcoin contributions are 🤯 Notable BIPs 🔧 BIP 340 (Schnorr Signatures) 🔧 BIP 341 (Taproot) 🔧 BIP 327 (MuSig2) Notable research: 📜 Shielded CSV 📜 Signature aggregation 📜 Post-quantum hash-based signatures

Anthony Towns (@ajtowns) and Mikhail Kudinov (@kudinov_mikhail) joined Optech to discuss Newsletter #386. A notice about the wallet migration bug in Bitcoin Core was discussed at (56:30) News ● Building a vault using blinded co-signers (1:04:09) ● Peer feature negotiation (1:40) Changing consensus ● Year 2106 timestamp overflow uint64 migration (1:07:47) ● Relax BIP54 timestamp restriction for 2106 soft fork (1:11:36) ● Understanding and mitigating a CTV footgun (1:16:30) ● CTV activation meeting (1:21:00) ● `OP_CHECKCONSOLIDATION` to enable cheaper consolidations (1:23:11) ● Hash-based signatures for Bitcoin's post-quantum future (20:47) Releases and release candidates ● BTCPay Server 2.3.0 (1:28:29) Notable code and documentation changes ● Bitcoin Core #33657 (1:30:25) ● Bitcoin Core #32414 (1:33:23) ● Bitcoin Core #32545 (1:39:18) ● Bitcoin Core #33892 (1:42:13) ● Core Lightning #8784 (1:44:35) ● LND #9489 (1:45:54) ● BIPs #2051 (1:50:09) ● BOLTs #1299 (1:56:39) ● BOLTs #1305 (1:59:46)

.@blksresearch is leading Bitcoin's preparation for cryptographically relevant quantum computers. Cryptography Team Lead @n1ckler and @kudinov_mikhail explore the trade-offs in potential post-quantum defenses.

TFTC 700 w/ @kudinov_mikhail & @n1ckler: "Once an adversary sees your public key, they run their quantum computer and compute your private key. No obfuscation will save you." We discuss: ⚡️ The quantum timeline ⚡️ Bitcoin's vulnerabilities ⚡️ Preparing for the worst