bitcoin-dev threads | LearnBitcoin

Bitcoin Core security policy update

Thu, 22 Oct 2026 18:07:17 GMT

1 message; Antoine Poinsot. Hi, We recently experienced an increase in the number of reports for security vulnerabilities that can be easily (re-)discovered. This is largely due to LLMs drastically reducing the bar to find certain classes of ...

Exposure-aware transaction construction for wallets

Mon, 19 Oct 2026 17:29:08 GMT

1 message; Zeeshan Ali Khan. I would like to discuss an opt-in wallet transaction-construction policy for preserving resistance to BIP 360 long exposure attacks [1]. This is a companion to bitcoin/bips PR #2294 [2], which classifies exposure and ...

btc-verified October Update: Connecting Map to Territory

Mon, 19 Oct 2026 16:33:36 GMT

1 message; Keagan McClelland. Originally published on my site . Replicating here because I think the Delving audience has an interest in this work. ...

P2P UTXO Set Sharing

Tue, 05 May 2026 15:36:04 GMT

30 messages; Eric Voskuil (12), Fabian (8), Anthony Towns (3), Antoine Riard (2), Josie Baker (2), Saint Wenhao, sadiq Ismail, Sjors Provoost. Dear list, I am sharing a BIP draft for sharing the UTXO set over the P2P network, an old idea that makes it possible to utilize AssumeUTXO without sourcing a UTXO set dump from a third party source. You can find the ...

Lichen: L2s In CHannels ENforced on bitcoin

Sun, 11 Oct 2026 15:03:01 GMT

3 messages; waxwing/ AdamISZ (2), Dustin Ray. Hi list, The one-sentence version: L2s funded via co-owned 2 of 2 contracts with a single hub entity, without trusting it. I'll summarize here by copying the abstract of the paper [1], followed by a sort of Q&A; I think ...

Flame: confidential transactions with Bitcoin proof-of-burn consensus

Wed, 30 Sep 2026 22:33:27 GMT

3 messages; Oleg Andreev OOO (2), waxwing/ AdamISZ. I've been working on Flame, a Bitcoin "side chain", based on proof-of-burn consensus: a fully decentralized protocol in which nodes continuously burn bitcoins to protect against double-spending. I believe this approach ...

RE BIP 300: 26% censoring attack

Tue, 06 Oct 2026 21:05:36 GMT

1 message; Ori Newman. It seems like a 26% attacker can censor BIP 300 bundles indefinitely: Assume some drivechain publishes a valid bundle, the attacker can send ALARM messages in all of her blocks to reduce its score by 1 in each block. ...

[bitcoindev]

Tue, 06 Oct 2026 01:16:14 GMT

1 message; Luke Carriere. Hi bitcoin, I'd like feedback on a draft that standardizes the policy a co-signer enforces, not the co-signer itself. A co-signer that signs only when a predicate holds is a known way to emulate covenants today. Towns ...

LN-GAP : Lightning governed by arbitrary programs

Sun, 04 Oct 2026 14:51:08 GMT

1 message; waxwing/ AdamISZ. Hi list, Paper https://github.com/AdamISZ/ln-gap/blob/master/docs/paper/lngap-short.pdf (my words) and Repo: https://github.com/AdamISZ/ln-gap (AI generated 95% , see note at start of README) The party trick here is: ...

DropKick ⚽️ - A minimal commit/reveal PQ rescue protocol

Thu, 20 Aug 2026 21:30:01 GMT

5 messages; conduition (3), Alex, Antoine Riard. Dearest friends, colleagues, and lurkers, I would like to present for your consideration a new commit/reveal rescue protocol to save the coins of quantum procrastinators - those who take no action to move their coins to ...

Getting BIP54 past the finish line

Fri, 02 Oct 2026 04:59:32 GMT

1 message; Antoine Riard. Hello devs, Writing this post to do a summary of where from my viewpoint BIP 54 is, in terms of technical readiness, and what are the remaining steps to be done, to move it toward its technical finalization and after ...

MHFE: memory-hard encryption of BIP39 backups into 24 words — request for review

Thu, 01 Oct 2026 16:46:00 GMT

1 message; Sergei Semenov. Hi everyone, I’m sharing *MHFE (Memory-Hard Feistel Encryption)*, an experimental specification for encrypting an existing English BIP39 mnemonic with a password into another checksum-valid, 24-word BIP39 mnemonic—the ...

Convention for tagged hash tags in BIPs

Tue, 22 Sep 2026 09:07:05 GMT

2 messages; Fabian, Sjors Provoost. Hi all, while reviewing BIP 459 (DahLIAS) theStack pointed out to me that most recent cryptography BIPs put the BIP number into their tagged hash tags but that some others use a descriptive name instad. The same ...

A Post-Quantum Path for BIP 324

Tue, 05 May 2026 04:40:42 GMT

8 messages; Olaoluwa Osuntokun (3), conduition (2), Ethan Heilman, Jonas Schnelli, Liam Gilligan. Hi y'all, In case you weren't already tired of all the recent dev list chatter re post quantum cryptography, here's another! When the topic of Bitcoin transitioning to a post quantum world is brought up, the discussion ...

BIP324 One-Byte Message Type ID Alias Assignment

Sun, 20 Sep 2026 02:08:14 GMT

3 messages; Anthony Towns (2), Peter Todd. Hello world, I'd like to propose adding a `set324alias` p2p message for dynamic assignment of BIP324 one-byte message type IDs for P2P messages. You can see the current (non-dynamic) assignments at: - ...

QSAVE post-quantum solution for non-migrated coins

Tue, 22 Sep 2026 23:13:05 GMT

1 message; James T. QSAVE is a post-quantum transition solution that avoids burning coins. I have tried to incorporate the feedback I received on my earlier posts. The proposed solution is laid out in five draft BIPs, with MediaWiki ...

Bitcoin Core 32.0rc2 release candidate is available

Tue, 22 Sep 2026 16:10:40 GMT

1 message; Sebastian Kung. Binaries for Bitcoin Core version v32.0rc2 are available from: https://bitcoincore.org/bin/bitcoin-core-32.0/test.rc2/ Source code can be found under the signed tag https://github.com/bitcoin/bitcoin/tree/v32.0rc2 This ...

No burn, Quantum Migration Proposal, Quantum Secure Asset Verification & Escrow (QSAVE)

Mon, 04 Aug 2025 21:18:11 GMT

9 messages; James T (4), conduition (3), Javier Mateos, Erik Aronesty. This BIP Proposal is an alternative to QRAMP or a quantum winner-takes-all approach to the migration from a pre- to post quantum blockchain. It could be implemented as a hard fork OR as a consensus that quantum actors ...

SHRINCS: an efficient hash-based signature scheme for Bitcoin (first draft)

Wed, 26 Aug 2026 21:17:20 GMT

7 messages; conduition (4), Murch (2), Antoine Riard. Hi everyone, it's me again. On behalf of the SHRINCS Working Group, I am excited to announce a first draft of a cryptographic BIP that fully specifies SHRINCS: A semi-stateful hash-based signature scheme for Bitcoin. ...

Standardizing public key exposure classification for existing outputs

Fri, 04 Sep 2026 19:10:58 GMT

5 messages; duncan0k (4), conduition. Hi all, I would like to gauge interest in a specification that defines how to classify an existing Bitcoin output by whether the public key needed to spend it has already been published on-chain. The gap: BIP 360 gives ...

Transport Feature Negotiation

Thu, 17 Sep 2026 23:23:13 GMT

1 message; Liam Gilligan. Hi everyone, TL;DR (using Terms and Defs below): In order to support encryption upgrades and the addition of authentication to P2P, I propose we specify a Transport Feature Negotiation protocol, which gives a framework ...

Wallet label synchronization (BIP-329 records over encrypted stores)

Sun, 13 Sep 2026 19:47:39 GMT

2 messages; Jakub, Craig Raw. Hello, BIP-329 solved the data layer for wallet labels, but moving labels between wallets is still a manual export/import cycle. Users running multiple wallets over the same descriptor (a desktop coordinator plus a ...

Unspendable Internal Keys for Wallet Policies

Wed, 09 Sep 2026 18:41:02 GMT

2 messages; 2099999997690000, duncan0k. Hi all, Resending with the correct subject; the proposal is unchanged. Apologies for the duplicate. Pursuant to the discussions about standardizing an unspendable NUMS key for an script path only taproot policy ...

bitcoindev@googlegroups.com

Wed, 09 Sep 2026 18:19:18 GMT

1 message; 2099999997690000. Hi all, Pursuant to the discussions about standardizing an unspendable NUMS key for an script path only taproot policy https://delvingbitcoin.org/t/unspendable-keys-in-descriptors/304 and ...

Unbreaking testnet4

Tue, 18 Mar 2025 14:29:35 GMT

35 messages; Saint Wenhao (9), Garlo Nicon (5), Melvin Carvalho (4), Sjors Provoost (4), pithosian (3), Antoine Poinsot (2), Murch (2), Jameson Lopp (2), +4 more. Hi, Testnet4 was rolled out a year ago to address the shortcomings of testnet3. One of those shortcomings was the difficulty reset creating havoc. [0] In spite of this a similar rule was adopted for testnet4. [1] As a ...

Comparison of Bitcoin Covenant Proposals for Vaults

Fri, 04 Sep 2026 19:01:22 GMT

1 message; Lillian Wang. Hello list, I am sharing a report comparing simplified Bitcoin vault constructions using presigned transactions, CTV, APO/APOAS, TXHASH, CCV, and an OP_CAT-based Purrfect Vault construction. Comparison factors include ...

Knowledge Gathering: SPV Proof Applications In the Wild and Proposed

Thu, 14 May 2026 14:46:05 GMT

5 messages; Jeremy Rubin, Ekrem BAL, Olaoluwa Osuntokun, Sergio Demian Lerner, conduition. Dear Bitcoin Developers, SPV proofs are an important part of Bitcoin's Design, after all Satoshi thought they were worth including in the whitepaper! As far as I'm aware, they have somewhat limited usage in the wild, ...

Silent payments light clients: measurements and index commitments

Wed, 02 Sep 2026 09:52:30 GMT

1 message; Rob Segers. Hi list, The delving thread on silent payments light clients (https://delvingbitcoin.org/t/silent-payments-light-client-protocol/891) stalled in mid-2024 waiting on numbers. I measured them, and can't post on delving ...

Draft BIP for discussion: Time-Shifted Proof of Work (TSPOW) — an informational consensus-design proposal

Thu, 27 Aug 2026 11:43:18 GMT

3 messages; Jack Liao (2), Saint Wenhao. Hi all, I am sharing a draft BIP for feedback before submitting it to the bips repository. It is classified as Informational: it documents a consensus-design pattern and its security analysis. It does NOT recommend ...

post-quantum: solution ideas to "tripwire"game-theory issues + a certificate-based rescue protocol

Wed, 19 Aug 2026 22:27:37 GMT

3 messages; Antoine Riard (2), conduition. Hello, In this post, I'm detailing (a) what could be a solution for the game-theory difficulties of the "tripwire" NUMS point and (b) a second solution for the exact same problem, relying on different assumptions and ...

Anti-Fee-Sniping with LockTime

Tue, 18 Aug 2026 08:00:01 GMT

3 messages; nervana21 (2), 0xB10C. Hello all, Anti-fee-sniping with nLockTime has been present in Bitcoin Core since 2014 and in Electrum since 2017. BIP326 assumes this nLockTime behavior as the baseline and uses nSequence instead for some taproot ...

Add importprivkeys RPC

Fri, 03 Oct 2025 07:34:51 GMT

4 messages; blocktraveler (3), Email para newsletters. Hy there! Unfortunately, the PRs are locked, so I'm sharing my thoughts this way. Over the years, people have asked countless times on various platforms how to import private keys (both legacy and Bech32/SegWit) into a ...

Giving teeth to expected EC disabling: P2XX(-T)(-ML)

Thu, 25 Jun 2026 17:42:35 GMT

22 messages; Pieter Wuille (5), conduition (5), waxwing/ AdamISZ (5), Sjors Provoost (2), Antoine Riard (2), Boris Nagaev, Anthony Towns, Erik Aronesty. Hi all, In parallel to the threads[1][2][3] discussing the P2TRv2 and P2MR concepts, I'd like to talk about the possibility of codifying in the consensus rules the (expectation of) the disabling of EC opcodes/paths ...

static-pie release binaries available for testing

Thu, 06 Aug 2026 14:39:22 GMT

2 messages; Michael Ford (2). Hi list, I've been working on producing `-static-pie` release binaries for Bitcoin Core, using our existing Guix infrastructure. The goal is to ship release binaries that are as self-contained as possible, doing away ...

Stale Tip Relay

Wed, 29 Jul 2026 17:21:51 GMT

3 messages; Ram (2), Edil Guimarães de Medeiros. Hello list, This proposal introduces `staletip`, an opt-in P2P message for relaying recent stale tips between peers. Building on AJ Towns' initial work, w0xlt and I have developed the proposal further and built a ...

The game-theory problems of PQ sunsetting modes

Sun, 12 Jul 2026 18:34:40 GMT

4 messages; Antoine Riard (2), conduition (2). Hi list, In this post, I'm extending on the game-theory problems underscored for my answer to [ ] to other post-quantum sunsetting scenarios previously mentioned on this list. Firstly, let's remember the "tripwire" idea ...

Quantum Recovery Of Hashed Address Secured Coins With No Confiscatory Risk

Tue, 14 Jul 2026 16:39:14 GMT

6 messages; shinobimonkey (3), conduition (3). Currently the discussion around how to address the potential risk of a viable quantum computer centers around two primary issues: the quantum-safe signature schemes (or schemes) to integrate for users to migrate to and ...

Motion to remove Luke Dashjr from BIP Editors

Sun, 09 Aug 2026 18:29:09 GMT

12 messages; Murch (2), Luke Dashjr, Jameson Lopp, Matt Corallo, Michael Tidwell, Olaoluwa Osuntokun, Antoine Riard, Jonas Nick, +3 more. Hello everyone, I recommend that Luke Dashjr be removed from the position of BIP Editor. Over the past several years, Luke has been at the center of many contentious disputes within the Bitcoin ecosystem, and this week ...

BIP 110: update status to closed

Sun, 09 Aug 2026 18:06:01 GMT

8 messages; Greg Tonoski (3), Jon Atack, Anthony Towns, Murch, Sjors Provoost, Saint Wenhao. Hello list, I'd like to propose marking BIP 110 Reduced Data Temporary Softfork as closed, following the chain split yesterday during its mandatory signaling period, when its chain began rejecting as invalid all blocks ...

rawtr() Output Script Descriptors

Thu, 06 Aug 2026 13:51:55 GMT

1 message; Jean Pablo. The rawtr() descriptor has been in Bitcoin Core since 24.0, but it was never specified in a BIP. Pieter noted this on the bips repo back in March [0] and nobody picked it up, so I wrote a draft: ...

Bitcoin Resilience Presentations — August 5

Thu, 30 Jul 2026 23:00:13 GMT

3 messages; Shannon Appelcline (3). Next Wednesday, August 5th at 10am PT, Blockchain Commons will host a Bitcoin-focused Gordian Developers Meeting about improving the protection of your secrets. The general goal is to demonstrate how you can ensure the ...

BIP draft: CISA for Taproot Key Path Spends

Sat, 18 Jul 2026 12:39:08 GMT

8 messages; Fabian (4), waxwing/ AdamISZ (2), conduition, Boris Nagaev. Hi list, I would like to share a BIP draft for transaction-wide cross-input signature aggregation (CISA). It introduces a new witness version, which enables Taproot-style key path spending where inputs can aggregate ...

libsecp256k1 v0.8.0 released

Mon, 03 Aug 2026 22:15:04 GMT

1 message; Sebastian Falbesoner. We'd like to announce the release of version 0.8.0 of libsecp256k1: https://github.com/bitcoin-core/secp256k1/releases/tag/v0.8.0 The most notable changes are: * Addition of a new Silent Payments (BIP 352) module with ...

Informational BIP on Low-R Signature Grinding

Tue, 09 Jun 2026 07:02:52 GMT

4 messages; Sean Gilligan (2), Murch, Liam Gilligan. Hi Everyone, I would like to propose a new informational BIP to formally document the Low-R signature algorithm used by Bitcoin Core and many other wallets. It was implemented in 2018 in Bitcoin Core by PR 1366 [0]. The ...

Testnet 4 difficulty/hashrate

Fri, 05 Jun 2026 10:00:41 GMT

3 messages; Anthony Towns, Ali Sherief, Antoine Poinsot. On Fri, Jun 05, 2026 at 07:35:27PM +1000, Anthony Towns wrote: If testnet4's current difficulty is D=1239M [0], and there were no min-difficulty blocks, that would be one thing. But there are min-difficulty blocks, and ...

new backbone code release with bitcoind python test framework integration

Fri, 24 Jul 2026 01:45:00 GMT

1 message; Antoine Riard. Hi devs, For the curious, I released a new version of backbone code, the 6th public release, mostly focus on starting the heavy work of quality assurance and testing. After testing a lot of tweaks, succeeded to overhaul ...

Bitcoin Core 30.3 released

Thu, 23 Jul 2026 09:21:05 GMT

1 message; Sebastian Kung. Bitcoin Core version 30.3 is now available from: This release includes new features, various bug fixes and performance improvements, as well as updated translations. ...

Bitcoin Core 29.4 released

Wed, 22 Jul 2026 12:15:45 GMT

1 message; Sebastian Kung. Bitcoin Core version 29.4 is now available from: This release includes various bug fixes and performance improvements, as well as updated translations. Please report bugs ...

Bitcoin After Block Rewards: preventing miner deviation as the block rewards approaches zero

Sat, 11 Jul 2026 22:08:25 GMT

2 messages; Junhyuk Jun Lee, Melvin Carvalho. Hi, list. *I'd like to share a paper on Bitcoin security in the fee-only regime, after block rewards reach zero. * This paper analyzes at what point deviating from honest mining becomes the rational strategy and how to ...

BIP draft: Full-Aggregation of BIP 340 Signatures

Mon, 06 Jul 2026 11:53:45 GMT

5 messages; Fabian (3), waxwing/ AdamISZ (2). Hi list, I would like to share a BIP draft for full-aggregation of BIP 340 signatures, a standard for the DahLIAS interactive aggregate signature scheme by Jonas Nick, Tim Ruffing, and Yannick Seurin: ...