Blockstream Research (@blksresearch)

Oleksandr @olkurbatov talks about his research on Silent Payments for Multiparty Wallets.

Bitcoin Optech Verified account @bitcoinoptech 5d

Elias Rohrer (@_tnull), Greg Sanders (@theinstagibbs), Antoine Poinsot (@darosior), Oleksandr Kurbatov (@olkurbatov), and Nishant Bansal (@nishant282003) joined Optech to discuss Newsletter #429:

News
● Silent payments for multiparty wallets (41:18)
● CLN self-referential channel announcement DoS disclosure (52:57)
● Bitcoin Core security policy update (24:53)

Selected Q&A from Bitcoin Stack Exchange
● Why does Bitcoin use both a transaction ID and a witness transaction ID? (1:02:58)
● How to sign a MuSig with Bitcoin Core (1:07:54)
● What changed in Bitcoin P2P protocol version 70017 compared to 70016? (1:09:11)

Releases and release candidates
● Bitcoin Core 32.1 (35:56)
● Bitcoin Core 31.2 (39:18)
● Bitcoin Core 30.4 (40:42)
● Bitcoin Core 29.5 (40:53)
● Eclair 0.14.6 (1:12:37)
● LND v0.21.5-beta (1:13:36)

Notable code and documentation changes
● Bitcoin Core #36665 (3:43)
● Bitcoin Core #36667 (14:37)
● Bitcoin Core #36669 (19:02)
● BIPs #2130 (1:15:55)
● Core Lightning #9627 (1:17:33)
● Eclair #3417 (1:19:13)
● Eclair #3416 (1:26:02)
● LDK #5314 (1:28:48)
● LDK #5412 (1:31:27)
● LND #11164 (1:33:28)
● LND #11373 (1:36:17)
● BTCPay Server #7744 (1:38:59)

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Blockstream Research @blksresearch 5d

New paper by @error024, Benedikt Wagner, and Emile Wambsgans on formally proving the security of hash-based signatures in Lean.

The goal: establish precise, machine-checked security bounds to help design better autoresearch challenges for future hash functions.

Mikhail Kudinov @kudinov_mikhail 5d

We published a paper (eprint.iacr.org/2026/2626) about exact definitions of bit-security. We noticed that depending on how you account the adversary's work we have slightly (but noticeable) different security of Hash-based schemes. Be careful with your Lean-proofs and statements :)
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Blockstream Research @blksresearch Nov 2

BIP 458: Half-Aggregation of BIP 340 Signatures,
authored by @fjahr, @real_or_random, and @n1ckler, was just merged into the bips repository 🚀

Blockstream Research @blksresearch Sep 22

When he isn't busy proving the security of SHRINCS, Blockstream Research's @kudinov_mikhail reviews alternatives.

Just 48 hours after publication, he identified 4 high/critical vulnerabilities in a hash-based signature candidate in Round 1 of China's next-gen standards program (ICCS).

mjos\dwez @mjos_crypto Sep 22

New NGCC vulns from Kris Kwiatkowski on
- SC ( ngcc.dev/reports/sign-0… ),
- YuanYang ( ngcc.dev/reports/sign-3… ), and
- FactoDS ( ngcc.dev/reports/sign-1… ).
Plus eight (!) new FlexTree vulns from Mikhail Kudinov:
- ngcc.dev/reports/sign-1…
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Blockstream Research @blksresearch Aug 26

Lattice-based Signature Schemes for Bitcoin

A self-contained review of three lattice-based signature schemes, with Bitcoin's post-quantum transition as the motivating application.

Read the full paper at
eprint.iacr.org/2026/1628.pdf

Blockstream Verified account @Blockstream Aug 26

If Bitcoin had to choose a lattice signature today, it would be Falcon-1024.

@blksresearch has published a full report on Dilithium, Falcon and Hawk: what each costs on-chain, how hard each is to implement safely, and which assumptions you are trusting.

blog.blockstream.com/lattice-signat…
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