Bitcoin Optech newsletter #401 is here: - describes an idea for nested MuSig2 Lightning nodes - summarizes a project formally verifying secp256k1’s modular scalar multiplication - summarizes changes to services/client software - Optech Newsletter #401 Podcast

Bitcoin Optech

Bitcoin Optech Newsletter #401

This week’s newsletter describes an idea for nested MuSig2 Lightning nodes and summarizes a project formally verifying secp256k1’s modular scal...

ZmnSCPxj posted to Delving Bitcoin about the idea to create k-of-n multisignature Lightning nodes by leveraging nested MuSig2...

Bitcoin Optech

Bitcoin Optech Newsletter #401

This week’s newsletter describes an idea for nested MuSig2 Lightning nodes and summarizes a project formally verifying secp256k1’s modular scal...

Remix7531 posted to the Bitcoin-Dev mailing list about formally verifying secp256k1’s modular scalar multiplication...

Bitcoin Optech

Bitcoin Optech Newsletter #401

This week’s newsletter describes an idea for nested MuSig2 Lightning nodes and summarizes a project formally verifying secp256k1’s modular scal...

Changes to services and client software: - Coldcard 6.5.0 adds MuSig2 and miniscript - Frigate 1.4.0 released - Bitcoin Backbone updates - Utreexod 0.5 released

Bitcoin Optech

Bitcoin Optech Newsletter #401

This week’s newsletter describes an idea for nested MuSig2 Lightning nodes and summarizes a project formally verifying secp256k1’s modular scal...

Bitcoin Optech will host an audio recap discussion of this newsletter streaming live on X/Twitter Tuesday at 16:30 UTC.

Julian Moik joined Optech to discuss Newsletter #400: - The ‘Testing Bitcoin Core 31.0 Release Candidates’ Bitcoin Core PR Review Club - Great Script Restoration BIPs 440, 441 - And more You can listen on our website:

Bitcoin Optech

Bitcoin Optech Newsletter #400 Recap Podcast

Mark “Murch” Erhardt, Gustavo Flores Echaiz, and Mike Schmidt are joined by Julian Moik to discuss Newsletter #400.

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Mark “Murch” Erhardt, Gustavo Flores Echaiz, and Mike Schmidt are joined by Julian Moik to discuss ⁠Newsletter #400⁠.Bitcoin Core PR Revie...

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Bitcoin Optech: Newsletter #400 Recap

Podcast Episode · Bitcoin Optech Podcast · April 14 · 55m

Bitcoin Optech newsletter #400 is here: - recaps the "Testing Bitcoin Core 31.0 Release Candidates" PR Review Club meeting - Optech Newsletter #400 Podcast

Bitcoin Optech

Bitcoin Optech Newsletter #400

This week’s newsletter includes our regular sections summarizing a Bitcoin Core PR Review Club meeting and describing notable changes to popular ...

'Testing Bitcoin Core 31.0 Release Candidates' was a review club meeting that did not review a particular PR, but rather was a group testing effort. Before each major Bitcoin Core release, extensive testing by the community is considered essential. For this reason, a volunteer writes a testing guide for a release candidate so that as many people as possible can productively test without having to independently ascertain what’s new or changed in the release, and reinvent the various setup steps to test these features or changes...

Bitcoin Optech

Bitcoin Optech Newsletter #400

This week’s newsletter includes our regular sections summarizing a Bitcoin Core PR Review Club meeting and describing notable changes to popular ...

Bitcoin Optech will host an audio recap discussion of this newsletter streaming live on X/Twitter Tuesday at 16:30 UTC.

Armin Sabouri, Pyth, Conduition, and Jonas Nick joined Optech to discuss Newsletter #399: - Wallet fingerprinting risks for payjoin privacy - A draft BIP for a wallet backup metadata format - Compact isogeny post-quantum cryptography - The SHRIMPS post-quantum signature construction - Great Script Restoration BIPs 440, 441 - And more You can listen on our website:

Bitcoin Optech

Bitcoin Optech Newsletter #399 Recap Podcast

Mark “Murch” Erhardt, Gustavo Flores Echaiz, and Mike Schmidt are joined by Armin Sabouri, Pyth, Conduition, and Jonas Nick to discuss Newslett...

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Bitcoin Optech: Newsletter #399 Recap

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Bitcoin Optech: Newsletter #399 Recap

Podcast Episode · Bitcoin Optech Podcast · April 7 · 1h 43m

Bitcoin Optech newsletter #399 is here: - describes how wallet fingerprinting can damage payjoin privacy - summarizes a proposal for a wallet backup metadata format - links to post-quantum research using Isogenies - points to the recently assigned BIPs for GSR - examines SHRIMPS post-quantum signatures - Optech Newsletter #399 Podcast

Bitcoin Optech

Bitcoin Optech Newsletter #399

This week’s newsletter describes how wallet fingerprinting can damage payjoin privacy and summarizes a proposal for a wallet backup metadata form...

Armin Sabouri posted to Delving Bitcoin about how differences in payjoin implementations make it possible to fingerprint payjoin transactions and can damage payjoin’s privacy...

Bitcoin Optech

Bitcoin Optech Newsletter #399

This week’s newsletter describes how wallet fingerprinting can damage payjoin privacy and summarizes a proposal for a wallet backup metadata form...

Pythcoiner posted to the Bitcoin-Dev mailing list about a new proposal for a common structure for wallet backup metadata...

Bitcoin Optech

Bitcoin Optech Newsletter #399

This week’s newsletter describes how wallet fingerprinting can damage payjoin privacy and summarizes a proposal for a wallet backup metadata form...

Conduition wrote on Delving Bitcoin about his research into the suitability of Isogeny-Based Cryptography (IBC) as a post-quantum cryptosystem for Bitcoin...

Bitcoin Optech

Bitcoin Optech Newsletter #399

This week’s newsletter describes how wallet fingerprinting can damage payjoin privacy and summarizes a proposal for a wallet backup metadata form...

Rusty Russell wrote on the Bitcoin-Dev mailing list that the first two BIPs of the Great Script Restoration (or Grand Script Renaissance) have been submitted for BIP numbering...

Bitcoin Optech

Bitcoin Optech Newsletter #399

This week’s newsletter describes how wallet fingerprinting can damage payjoin privacy and summarizes a proposal for a wallet backup metadata form...

Jonas Nick writes on Delving Bitcoin about a new semi-stateful hash-based signature construction for post-quantum Bitcoin...

Bitcoin Optech

Bitcoin Optech Newsletter #399

This week’s newsletter describes how wallet fingerprinting can damage payjoin privacy and summarizes a proposal for a wallet backup metadata form...

Bitcoin Optech will host an audio recap discussion of this newsletter streaming live on X/Twitter Tuesday at 16:30 UTC.

Dusty Daemon joined Optech to discuss Newsletter #398: - Selected Q&A from the Bitcoin Stack Exchange - Splicing spec merged - And more You can listen on our website:

Bitcoin Optech

Bitcoin Optech Newsletter #398 Recap Podcast

Mike Schmidt and Gustavo Flores Echaiz are joined by Dusty Daemon to discuss Newsletter #398.

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Bitcoin Optech: Newsletter #398 Recap

Podcast Episode · Bitcoin Optech Podcast · March 31 · 52m

Bitcoin Optech newsletter #398 is here: - summarizes popular Q&A from Stack Exchange - Bitcoin Core 28.4, Core Lightning 26.04rc1 - Optech Newsletter #398 Podcast

Bitcoin Optech

Bitcoin Optech Newsletter #398

This week’s newsletter includes our regular sections with selected questions and answers from the Bitcoin Stack Exchange, announcements of new re...

Selected Q&A from Bitcoin Stack Exchange - What is meant by “Bitcoin doesn’t use encryption”? - When and why did Bitcoin Script shift to a commit–reveal structure? - Does P2TR-MS (Taproot M-of-N multisig) leak public keys? - Does OP_CHECKSIGFROMSTACK intentionally allow cross-UTXO signature reuse?

Bitcoin Optech

Bitcoin Optech Newsletter #398

This week’s newsletter includes our regular sections with selected questions and answers from the Bitcoin Stack Exchange, announcements of new re...

Bitcoin Optech will host an audio recap discussion of this newsletter streaming live on X/Twitter Tuesday at 16:30 UTC.

Matt Corallo, Gregory Sanders, and Sebastian van Staa joined Optech to discuss Newsletter #397: - Changes to services and client software including items about FIBRE, L402, and others - The Bitcoin Core 31.0rc1 testing guide - OP_TEMPLATEHASH and Taproot-native (Re)bindable Transactions - And more You can listen on our website:

Bitcoin Optech

Bitcoin Optech Newsletter #397 Recap Podcast

Mark “Murch” Erhardt, Gustavo Flores Echaiz, and Mike Schmidt are joined by Matt Corallo, Gregory Sanders, and Sebastian van Staa to discuss Ne...

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Bitcoin Optech: Newsletter #397 Recap

Podcast Episode · Bitcoin Optech Podcast · March 24 · 1h 30m

Bitcoin Optech newsletter #397 is here: - summarizes changes to services/client software including Cake, Sparrow, FIBRE, and more - Bitcoin Core 31.0rc1 - Optech Newsletter #397 Podcast

Bitcoin Optech

Bitcoin Optech Newsletter #397

This week’s newsletter includes our regular sections describing changes to services and client software, announcing new releases and release cand...

Changes to services and client software: - Cake Wallet adds Lightning support - Sparrow 2.4.0 and 2.4.2 released - Blockstream Jade adds Lightning via Liquid - Lightning Labs releases agent tools - Tether launches MiningOS - FIBRE network relaunched - TUI for Bitcoin Core released

Bitcoin Optech

Bitcoin Optech Newsletter #397

This week’s newsletter includes our regular sections describing changes to services and client software, announcing new releases and release cand...

Bitcoin Core 31.0rc1 is a release candidate for the next major version of the predominant full node implementation. A testing guide is available...

Bitcoin Optech

Bitcoin Optech Newsletter #397

This week’s newsletter includes our regular sections describing changes to services and client software, announcing new releases and release cand...

Bitcoin Optech will host an audio recap discussion of this newsletter streaming live on X/Twitter Tuesday at 16:30 UTC.

Jonathan Harvey-Buschel joined Optech to discuss Newsletter #396: - Collision-resistant hash function for Bitcoin Script - Continued discussion of Gossip Observer traffic analysis tool - And more You can listen on our website:

Bitcoin Optech

Bitcoin Optech Newsletter #396 Recap Podcast

Mark “Murch” Erhardt, Gustavo Flores Echaiz, and Mike Schmidt are joined by Jonathan Harvey-Buschel to discuss Newsletter #396.

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Mark “Murch” Erhardt, Gustavo Flores Echaiz, and Mike Schmidt are joined by Jonathan Harvey-Buschel to discuss ⁠Newsletter #396⁠.News● C...

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Bitcoin Optech: Newsletter #396 Recap

Podcast Episode · Bitcoin Optech Podcast · March 17 · 50m

Bitcoin Optech newsletter #396 is here: - describes a collision-resistant hash function using Bitcoin Script - summarizes continued discussion of Lightning Network traffic analysis - Optech Newsletter #396 Podcast

Bitcoin Optech

Bitcoin Optech Newsletter #396

This week’s newsletter describes a collision-resistant hash function using Bitcoin Script and summarizes continued discussion of Lightning Networ...

Robin Linus posted to Delving Bitcoin about Binohash, a new collision-resistant hash function using Bitcoin Script…

Bitcoin Optech

Bitcoin Optech Newsletter #396

This week’s newsletter describes a collision-resistant hash function using Bitcoin Script and summarizes continued discussion of Lightning Networ...

Jonathan Harvey-Buschel posted updates about Gossip Observer, a tool for collecting LN gossip traffic and computing metrics to evaluate replacing message flooding with a set-reconciliation-based protocol…

Bitcoin Optech

Bitcoin Optech Newsletter #396

This week’s newsletter describes a collision-resistant hash function using Bitcoin Script and summarizes continued discussion of Lightning Networ...

Bitcoin Optech will host an audio recap discussion of this newsletter streaming live on X/Twitter Tuesday at 16:30 UTC.

Jon McAlpine, Antoine Poinsot, Mike Casey, and Ethan Heilman joined Optech to discuss Newsletter #395: - A standard for stateless VTXO verification - Draft BIP for expanded nVersion nonce space for miners - Extensions to standard tooling for TEMPLATEHASH-CSFS-IK support - Hourglass V2 update - Algorithm agility for Bitcoin - The limitations of cryptographic agility in Bitcoin - And more You can listen on our website:

Bitcoin Optech

Bitcoin Optech Newsletter #395 Recap Podcast

Mark “Murch” Erhardt, Gustavo Flores Echaiz, and Mike Schmidt are joined by Jon McAlpine, Antoine Poinsot, Mike Casey, and Ethan Heilman to dis...

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Bitcoin Optech: Newsletter #395 Recap

Podcast Episode · Bitcoin Optech Podcast · March 11 · 2h 8m

Bitcoin Optech newsletter #395 is here: - describes a standard for verifying VTXOs across different Ark implementations - links to a draft BIP for expanding the miner-usable nonce space in the block header’s nVersion field - points to extensions to standard tooling for TEMPLATEHASH-CSFS-IK support - summarizes updates to the Hourglass V2 proposal - examines perspectives on cryptographic algorithm agility for Bitcoin - Optech Newsletter #395 Podcast

Bitcoin Optech

Bitcoin Optech Newsletter #395

This week’s newsletter describes a standard for verifying VTXOs across different Ark implementations and links to a draft BIP for expanding the m...

Jgmcalpine posted to Delving Bitcoin about his proposal for V-PACK, a stateless VTXO verification standard, which aims to provide a mechanism to independently verify and visualize VTXOs in the Ark ecosystem...

Bitcoin Optech

Bitcoin Optech Newsletter #395

This week’s newsletter describes a standard for verifying VTXOs across different Ark implementations and links to a draft BIP for expanding the m...

Matt Corallo posted to the Bitcoin-Dev mailing list a draft BIP to increase the number of bits available in nVersion’s nonce space for miners from 16 to 24...

Bitcoin Optech

Bitcoin Optech Newsletter #395

This week’s newsletter describes a standard for verifying VTXOs across different Ark implementations and links to a draft BIP for expanding the m...

Antoine Poinsot wrote on the Bitcoin-Dev mailing list about his preliminary work to integrate the taproot-native OP_TEMPLATEHASH soft fork proposal into miniscript and PSBTs...

Bitcoin Optech

Bitcoin Optech Newsletter #395

This week’s newsletter describes a standard for verifying VTXOs across different Ark implementations and links to a draft BIP for expanding the m...

Mike Casey posted an update to the Bitcoin-Dev mailing list for the Hourglass protocol to mitigate the market impact of quantum attacks against certain lost coins...

Bitcoin Optech

Bitcoin Optech Newsletter #395

This week’s newsletter describes a standard for verifying VTXOs across different Ark implementations and links to a draft BIP for expanding the m...

Ethan Heilman wrote on the Bitcoin-Dev mailing list regarding the potential need for RFC7696 Cryptographic Algorithm Agility in Bitcoin...

Bitcoin Optech

Bitcoin Optech Newsletter #395

This week’s newsletter describes a standard for verifying VTXOs across different Ark implementations and links to a draft BIP for expanding the m...

Pieter Wuille wrote to the Bitcoin-Dev mailing list about the limitations of the cryptographic agility...

Bitcoin Optech

Bitcoin Optech Newsletter #395

This week’s newsletter describes a standard for verifying VTXOs across different Ark implementations and links to a draft BIP for expanding the m...

Bitcoin Optech will host an audio recap discussion of this newsletter streaming live on X/Twitter Tuesday at 17:30 UTC.

Craig Raw and Fabian Jahr joined Optech to discuss Newsletter #394: - Draft BIP for output script descriptor annotations - ASMap in Bitcoin Core - Bitcoin Stack Exchange questions about BIP324 and spy mining - And more You can listen on our website:

Bitcoin Optech

Bitcoin Optech Newsletter #394 Recap Podcast

Mark “Murch” Erhardt and Mike Schmidt are joined by Craig Raw and Fabian Jahr to discuss Newsletter #394.

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Bitcoin Optech: Newsletter #394 Recap

Podcast Episode · Bitcoin Optech Podcast · March 3 · 1h 4m

Bitcoin Optech newsletter #394 is here: - looks at a proposed BIP for including supplemental information with output script descriptors - summarizes popular Q&A from Stack Exchange - Optech Newsletter #394 Podcast

Bitcoin Optech

Bitcoin Optech Newsletter #394

This week’s newsletter looks at a proposed BIP for including supplemental information with output script descriptors. Also included are our regul...

Craig Raw posted to the Bitcoin-Dev mailing list about a new BIP idea to provide useful metadata in the form of annotations, expressed as key/value pairs, appended directly to the descriptor...

Bitcoin Optech

Bitcoin Optech Newsletter #394

This week’s newsletter looks at a proposed BIP for including supplemental information with output script descriptors. Also included are our regul...

Selected Q&A from Bitcoin Stack Exchange - Is Bitcoin BIP324 v2 P2P transport distinguishable from random traffic? - What if a miner just broadcasts the header and never gives the block?

Bitcoin Optech

Bitcoin Optech Newsletter #394

This week’s newsletter looks at a proposed BIP for including supplemental information with output script descriptors. Also included are our regul...

Bitcoin Optech will host an audio recap discussion of this newsletter streaming live on X/Twitter Tuesday at 17:30 UTC.

Misha Komarov, Erik De Smedt, and arbedout joined Optech to discuss Newsletter #393: - Recent OP_RETURN output statistics - Bitcoin PIPEs v2 - Changes to services and client software including: hArk-based Ark software, Sigbash v2 and others - And more You can listen on our website:

Bitcoin Optech

Bitcoin Optech Newsletter #393 Recap Podcast

Mark “Murch” Erhardt, Gustavo Flores Echaiz, and Mike Schmidt are joined by Misha Komarov, Erik De Smedt, and arbedout to discuss Newsletter #393.

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Bitcoin Optech: Newsletter #393 Recap

Podcast Episode · Bitcoin Optech Podcast · February 24 · 1h 31m

Sebastian Falbesoner and Oleksandr Kurbatov joined Optech to discuss Newsletter #392: - Proposal to limit the number of per-group silent payment recipients - BLISK, Boolean circuit Logic Integrated into the Single Key - And more You can listen on our website:

Bitcoin Optech

Bitcoin Optech Newsletter #392 Recap Podcast

Mark “Murch” Erhardt and Gustavo Flores Echaiz are joined by Sebastian Falbesoner and Oleksandr Kurbatov to discuss Newsletter #392.

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Bitcoin Optech: Newsletter #392 Recap

Podcast Episode · Bitcoin Optech Podcast · February 24 · 1h 32m

Bitcoin Optech newsletter #393 is here: - summarizes a discussion about recent OP_RETURN usage - describes a protocol to enforce covenant-like spending conditions without consensus changes - summarizes changes to services/client software including Ark software, silent payment and submarine swap support, and more - Optech Newsletter #393 Podcast

Bitcoin Optech

Bitcoin Optech Newsletter #393

This week’s newsletter summarizes a discussion about recent OP_RETURN usage and describes a protocol to enforce covenant-like spending conditions...

Anthony Towns posted to Delving about the recent OP_RETURN statistics since the release of Bitcoin Core v30.0 on October 10...

Bitcoin Optech

Bitcoin Optech Newsletter #393

This week’s newsletter summarizes a discussion about recent OP_RETURN usage and describes a protocol to enforce covenant-like spending conditions...

Misha Komarov posted to Delving Bitcoin about Bitcoin PIPEs, a protocol that allows enforcement of spending conditions without the need for consensus changes or optimistic challenge mechanisms...

Bitcoin Optech

Bitcoin Optech Newsletter #393

This week’s newsletter summarizes a discussion about recent OP_RETURN usage and describes a protocol to enforce covenant-like spending conditions...

Changes to services and client software: - Second releases hArk-based Ark software - Amboss announces RailsX - Nunchuk adds silent payment support - Electrum adds submarine swap features - Sigbash v2 announced

Bitcoin Optech

Bitcoin Optech Newsletter #393

This week’s newsletter summarizes a discussion about recent OP_RETURN usage and describes a protocol to enforce covenant-like spending conditions...

Bitcoin Optech will host an audio recap discussion of this newsletter streaming live on X/Twitter Tuesday at 17:30 UTC.

Bitcoin Optech newsletter #392 is here: - summarizes discussion of improving worst-case silent payment scanning performance - describes an idea for enabling many spending conditions in a single key - Optech Newsletter #392 Podcast

Bitcoin Optech

Bitcoin Optech Newsletter #392

This week’s newsletter summarizes discussion of improving worst-case silent payment scanning performance and describes an idea for enabling many ...

Sebastian Falbesoner posted to the Bitcoin-Dev mailing list the discovery and mitigation of a theoretical attack on silent payment recipients...

Bitcoin Optech

Bitcoin Optech Newsletter #392

This week’s newsletter summarizes discussion of improving worst-case silent payment scanning performance and describes an idea for enabling many ...

Oleksandr Kurbatov posted to Delving Bitcoin about BLISK, a protocol designed to express complex authorization policies using boolean logic...

Bitcoin Optech

Bitcoin Optech Newsletter #392

This week’s newsletter summarizes discussion of improving worst-case silent payment scanning performance and describes an idea for enabling many ...

Bitcoin Optech will host an audio recap discussion of this newsletter streaming live on X/Twitter Tuesday at 17:30 UTC.

Toby Sharp, Chris Hyunhum Cho, Jonas Nick, and Antoine Poinsot joined Optech to discuss Newsletter #391: - Work on a constant-time parallelized UTXO database - A new higher level language for writing Bitcoin Script - An idea to mitigate dust attacks - Changing consensus including BIP54 consensus cleanup and post-quantum signature discussions including SHRINCS, Falcon, and SLH-DSA verification performance - And more You can listen on our website:

Bitcoin Optech

Bitcoin Optech Newsletter #391 Recap Podcast

Mark “Murch” Erhardt, Gustavo Flores Echaiz, and Mike Schmidt are joined by Toby Sharp, Chris Hyunhum Cho, Jonas Nick, and Antoine Poinsot to d...

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Bitcoin Optech: Newsletter #391 Recap

Podcast Episode · Bitcoin Optech Podcast · February 11 · 2h 10m