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BITCOIN RAILS #61: QUANTUM CRYPTOGRAPHY FOR BITCOIN | with Dan Boneh Dan Boneh 🔗 YOUTUBE: 🌿 SPOTIFY: One of the most prolific and influential cryptographers in the world, it’s difficult to fully quantify the impact that Dan Boneh has had on Bitcoin and digital assets more broadly. Through both...

109,473 views • 25 days ago •via X (Twitter)

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BITCOIN RAILS #59: Post-Quantum Bitcoin Signatures (+ their tradeoffs) | with BIP 360 co-author Ethan ✨ is on BlueSky✨ Heilman 🐱 and Blockstream Head of Research Jonas Nick 🔗 YOUTUBE: 🌿 SPOTIFY: According to BIP 360 co-author Ethan Heilman, Bitcoin needs a minimum of two soft forks to become quantum resistant: P2MR (or an output type that can safely execute PQ signatures) + a post-quantum checksig (signature scheme). Ethan and the BIP 360 team (including myself and Hunter Beast 🕯️) introduced the P2MR part via a BIP 360 update late last year—but the question remains, what’s the most appropriate PQ signature scheme for Bitcoin? They all have substantive tradeoffs, but hash-based signatures seem to be leading technical discourse—likely due to recent optimizations by Jonas Nick and the broader Blockstream research team. It was an honor to sit down with both of these men - arguably the two most influential and productive cryptographers in Bitcoin quantum mitigation right now - for an in-depth review of the leading PQ signature schemes and a temperature check on Bitcoin’s post-quantum planning process. TBH, if you want to skip the noise and jump straight to the signal on quantum, this is the interview to watch. In this episode, we discuss: - What needs to happen at the soft fork, infra, and mitigation levels to fully quantum-harden Bitcoin - Recent updates to BIP 360 + breakdown of the leading hash-based signatures schemes for Bitcoin (SHRINCS + SHRIMPS) - Why we may actually get consensus around a stateful scheme for Bitcoin - Comparisons of hash-based signatures vs Lattice and Isogeny-based schemes - Assessing the risks of both waiting too long and acting too fast (and why quantum is a better threat to be facing than a potential classical attack) This episode of Bitcoin Rails is brought to you by my NEW sponsors: - LayerTwo Labs LayerTwo Labs — developing research, software, and technologies for scaling Bitcoin via the integration of Drivechains (BIP 300/301) - Hashi on Sui — a primitive for executing Bitcoin Defi transactions, without having to trust a federated bridge or other centralized entity - BitBox BitBox — an open-source Bitcoin-only hardware wallet, with smooth UX and no compromises on security. Check out Bitbox [dot] swiss and use code BITCOINRAILS to get a discount TIMESTAMPS: 00:00 Intro 02:18 Ethan’s Quantum Wakeup 05:18 How Blockstream Enters Post Quantum 09:25 BIP 360 Explained 12:11 How Bitcoin Transitions to PQ 17:35 Choosing Post Quantum Signatures 23:20 How Blockstream Created SHRINCS 27:22 Signature Budgets Importance Explained 41:13 What are SHRIMPS? 44:51 SHRIMPS vs SHRINCS 47:48 Why SLH-DSA Alone Won’t Cut It 49:24 Is a SHRIMPS + SHRINCS BIP Coming? 51:51 Blockstream’s Big Plans for Liquid 59:04 Quantum Readiness Roadmap 01:02:22 Importance of a PQ Recovery Plan 01:05:35 How Long Would a PQ Migration Take 01:11:17 Quantum Watchlist Recommendations

Isabel Foxen Duke⚡️

23,783 views • 1 month ago

BITCOIN RAILS #34: Bitcoin’s Security & Quantum Risks—and the Future of Satoshi’s Coins | with Jameson Lopp Jameson Lopp “Most people don’t think about security until it’s too late,” says the Casa co-founder and CSO. One of the most prolific thought-leaders in Bitcoin security and privacy, there are few people who understand the nuances of Bitcoin security quite as deeply - not to mention the OPSEC practices required to protect against wrench attacks, for instance, which are rising globally as Bitcoin price increases. More recently, Lopp has turned his attention to mitigating Bitcoin’s quantum vulnerabilities, including market risks associated with quantum-vulnerable Satoshi’s Coins + longer-term strategies for quantum-hardening of Bitcoin addresses long term. In this special episode of Bitcoin Rails, we cover: - Lopp’s experiences designing self-custody products at both BitGo and Casa - The swatting attack he suffered in 2017, and the radical steps he’s taken to secure his home location since - The ‘quantum computing’ challenge for Bitcoin and its impacts on Satoshi’s Coins - How the network may respond to QCs in the face of ossification and why QC preparation may be the hardest governance test the network has ever faced This episode is powered by: - Best In Slot (Best in Slot | BRC2.0 🧑‍🍳), the leading API for Ordinals and BRC20 data aggregation and indexing - Spark (Lightspark), a statechains implementation leading the path towards institutional adoption of Bitcoin-powered payments - Citrea (Citrea), the leading Bitcoin Rollup technology and contributor to the BitVM alliance 📌 Timestamps 00:00 – Intro: Quantum Computing Meets Bitcoin 00:19 – Jameson Lopp on the Bitcoin Rails 00:53 – The Quantum Threat to Bitcoin Security 06:32 – Lopp’s Path into Bitcoin & Security 12:58 – The Swatting Attack During the Block Size Wars 25:28 – Could Quantum Crack Satoshi’s Coins? 43:55 – Announcements & Sponsors Messages 45:30 – Building Bitcoin’s Quantum Resistance 47:00 – QBTC and the Push for Quantum-Resistant Bitcoin 48:43 – Why Changing Bitcoin Is So Hard 51:19 – Email Protocols, Ossification, and Bitcoin’s Future 01:01:53 – A Roadmap for Quantum Resistance

Isabel Foxen Duke⚡️

14,538 views • 9 months ago

BITCOIN RAILS #62: BITCOIN'S 3 BIGGEST CHALLENGES | with Neha Narula Director of Digital Currency Initiative (DCI) Massachusetts Institute of Technology (MIT) 🔗 YOUTUBE: 🌱 SPOTIFY: Neha Narula is the Director of the MIT Digital Currency Initiative, where she focuses on Bitcoin research and the broader design tradeoffs of decentralized money systems. Her work often centers on what Bitcoin gets right—and where it runs into hard limits—especially around scaling, decentralization, and how systems behave as global demand increases. In this interview, Neha and I explore longer-term risks to Bitcoin—including advancements in quantum computing and the implications of a diminishing block subsidy—as well as the ongoing challenge of scaling Bitcoin without losing access to self-custody. A thoughtful conversation on how Bitcoin may change in the coming years, we also explore its social and governance dynamics—including tensions within the development community over protocol changes, scaling philosophies, and the future direction of the system. This episode of Bitcoin Rails is brought to you by: LayerTwo Labs LayerTwo Labs — developing research, software, and technologies for scaling Bitcoin via the integration of Drivechains (BIP 300/301) Hashi on Sui — a primitive for executing Bitcoin Defi transactions, without having to trust a federated bridge or other centralized entity BitBox BitBox— an open-source Bitcoin-only hardware wallet, with smooth UX and no compromises on security. Check out Bitbox [dot] swiss and use code BITCOINRAILS to get a discount TIMESTAMPS: 00:00 Intro 00:17 Neha’s Origins 02:26 Bitcoin to MIT 04:40 Media Lab Culture and Mission 11:34 CBDCs as Digital Cash Debate 24:42 Funding Model and Bitcoin Security Budget 29:55 Reorg Risk and Quantum Computing 32:14 Bitcoin Dev Funding Map 42:49 Governance and Corporate Stakes 50:23 Quantum Tradeoffs Framework 56:02 Post Quantum Proposals 58:59 Prioritize PQ Transactions 01:00:54 Satoshi Coins Debate 01:02:12 Mining Incentives And Price 01:08:08 Corporate Funding And Governance 01:10:54 Scaling Self Custody And L2s 01:20:30 Bitcoin Kernel And Wrap Up

Isabel Foxen Duke⚡️

23,554 views • 18 days ago

BITCOIN RAILS #63: Bitcoin's threshold for trust-minimization—without a soft fork | with Sam Blackshear Sam Blackshear 🔗 YOUTUBE: 🌱 SPOTIFY: Some of the most impressive technical and commercial leaders in digital assets emerged from what insiders call the "Libra Mafia" — the team assembled by Meta to build Libra (later Diem). Though the project ultimately succumbed to regulatory pressure, it produced a generation of founders and engineers who went on to shape the industry, including Sam Blackshear (Sam Blackshear), a leading expert in blockchain programming languages and CTO of MystenLabs.sui In this episode of Bitcoin Rails, Sam joins me to discuss: - Why Mysten Labs has turned its focus toward Bitcoin + why Sam leans conservative on soft-fork changes to Bitcoin script - What makes a strong crypto programming language + why EVM is missing the mark - Why trust minimization remains the critical technical challenge standing between Bitcoin and broader DeFi adoption - Why Mysten Lab's new Hashi architecture may be the most trust-minimized architecture for Bitcoin "bridging" without a soft fork This episode of Bitcoin Rails is brought to you by: LayerTwo Labs LayerTwo Labs — developing research, software, and technologies for scaling Bitcoin via the integration of Drivechains (BIP 300/301) Hashi on Sui — a primitive for executing Bitcoin DeFi transactions, without having to trust a federated bridge or other centralized entity BitBox BitBox — an open-source Bitcoin-only hardware wallet, with smooth UX and no compromises on security. Check out Bitbox [dot] swiss and use code BITCOINRAILS to get a discount TIMESTAMPS: 00:00 — Intro 01:09 — Sam's Origin Story 04:40 — Building Move Inside Libra 10:18 — Why Sui Looks Like Bitcoin 15:55 — Libra Dies & Sui Is Born 23:06 — Quantum Resistance & Sui's Cryptography 28:24 — Bitcoin's Programmability Problem 34:39 — How Hashi Works 38:00 — Hashi's Trust Assumptions 53:54 — Why Nobody Else Could Build This 56:24 — The Future of Building on Bitcoin

Isabel Foxen Duke⚡️

33,167 views • 10 days ago

BITCOIN RAILS #38: Two Forces That Could Break Bitcoin: AI vs Quantum I with Martin Shkreli 🔗 YOUTUBE: 🌿 SPOTIFY: A couple months ago, I co-hosted an X space with LayerTwo Labs re: “Should Bitcoiners care about quantum computing?” You can imagine our surprise when (in?)famous tech investor Martin Shkreli arrived to share that he’s been researching this very question for years… and dropped that he’s been personally considering raising funds to hire a team of mathematicians to hack Satoshi’s Coins. In this episode, Martin and I explore the limits of Bitcoin’s security model and the two forces he believes could potentially challenge it: a computational path driven by advances in quantum hardware, and/or a mathematical path fueled by AI-assisted discovery. This interview additionally shares takes on: - Why hacking Bitcoin would be the "ultimate" mathematical achievement—and why hacking Satoshi’s coins should be considered a “bug bounty” for Bitcoin - Why quantum may be more problematic for Bitcoin than for the traditional tech world (e.g. why quantum doesn’t likely threaten NVIDIA) - The little known history of Bitcoin’s “overflow bug” (yup, Bitcoin *has* been hacked before… an exploit corrected by hard fork). - And of course, why mathematicians do their deepest work in prison 😉 As always, this episode of Bitcoin Rails can be viewed on YouTube or Spotify via the link available in my bio—and is brought to you with the help of my incredible partners: - Best In Slot (Best in Slot | BRC2.0 🧑‍🍳) – the leading API for Ordinals and BRC20 data aggregation and indexing - Spark (Lightspark) – a statechains implementation leading the path towards institutional adoption of Bitcoin-powered payments - Citrea (Citrea) – the leading Bitcoin rollup technology and contributor to the BitVM alliance 📷 Timestamps 00:00 Intro 02:57 Quantum Supremacy and Google’s Breakthroughs 05:02 Bitcoin’s Cryptographic Vulnerabilities 08:24 Studying Math and Cryptography Behind Bars 20:04 Governance and the Culture of Bitcoin Development 26:29 The Future of Quantum and AI in Cryptography 37:42 Hardware Challenges and Fidelity in Quantum 47:57 Game Theory and the Quantum Race 01:04:08 Bitcoin Recovery and the Quantum Security Question 01:08:38 Mathematical Challenges in Breaking Cryptography 01:15:08 The Role of AI in Future Mathematical Breakthroughs

Isabel Foxen Duke⚡️

62,881 views • 8 months ago

BITCOIN RAILS EPISODE #18: MAKE BITCOIN QUANTUM RESISTANT | with BIP360 author Hunter Beast Hunter Beast 🕯️ Quantum computing is a complicated topic—one that incites equal amounts of fear and skepticism depending on who you talk to… especially in Bitcoin. In this episode, BIP360 author Hunter Beast wisely shares why the “truth is likely somewhere in the middle,” citing incremental advancements in quantum computing that may eventually pose a legitimate threat to some Bitcoin addresses—as well as steps we can take to protect ourselves in the short, medium and long term. The correct posture is to “be prepared, not scared,” says Hunter Beast 🕯️ Ultimately, the introduction of quantum resistant cryptography—via proposals like BIP360—will be needed for higher degrees of security. That said, individuals can mitigate personal risk substantially through proper address-use hygiene. This episode breaks down the specific challenges Bitcoin will face in the event of a quantum attack, the likelihood of an attack over time, and the steps we’ll need to take at the individual and communal level to ensure Bitcoin’s safety. This episode includes detailed discussion of: 1) How quantum computing could potentially affect Bitcoin public/private key cryptography—and technologies built on vulnerable addresses (e.g. Taproot) 2) Best practices for protecting yourself against quantum in the short and long term 3) Implications of vulnerable address types—e.g. what about Satoshi’s coins? 4) Deep Dive into BIP360 + proposed long-term solutions 5) Industry roadmaps for quantum computing + how banks and governments are preparing for “Q Day” As always, this episode can be viewed on Spotify or YouTuve—full episode in the comments or linktree in my bio. This episode is powered by Best In Slot—the leading API for Ordinals and BRC20 data aggregation and indexing. TIMESTAMPS: 00:00 Intro 02:05 What is quantum computing? 04:30 How could quantum threaten your Bitcoin wallet? 06:50 Addresses that are safe from quantum 09:13 Satoshi’s coins are in danger! 11:25 What happens if Satoshi’s coins are touched? 14:45 Do we softfork to shield Satoshi’s coins? 16:38 “Transitory inflation” for bitcoin after quantum 21:05 Why Taproot addresses are vulnerable 23:50 Do NOT reuse your Bitcoin addresses! 26:03 When will Quantum become a threat? 28:34 The long/short exposure attack; explained 31:45 Protection using private mempools 33:20 Why all the new Bitcoin L2s are in danger 37:45 Quantum is 5 to 10 years away, governments fear 40:34 Non-Bitcoin systems threatened by quantum 42:26 Centralized systems can adapt to quantum 43:50 Hunter’s BIP: Post quantum cryptography in Bitcoin 47:40 Hunter’s three new signature algorithms 53:48 Is new cryptography on Bitcoin risky? 56:33 Why not just stick to hash-based cryptography? 58:49 A 16X discount for quantum resistant addresses? 01:02:30 Creating quantum resistant multisig addresses 01:04:00 What is Frost? 01:06:50 The long process of approving a BIP 01:08:30 What developers think of Hunter’s BIP 01:10:00 Matt Corallo’s concerns with Hunter’s approach 01:11:00 Steps to implementing the BIP 360 01:17:00 Where to learn more about BIP 360 01:17:50 Who can push the button to change Bitcoin?

Isabel Foxen Duke⚡️

31,126 views • 1 year ago

BITCOIN RAILS #36: The Birth Story of ‘OPCAT’ | with proposal co-author Ethan ✨ is on BlueSky✨ Heilman 🐱 🔗 YOUTUBE: 🌿 SPOTIFY: As interest in Bitcoin Layer 2s skyrockets, the inclusion of OP_CAT — an opcode enabling concatenation of elements in the Bitcoin stack — has become a key technical upgrade to watch for its potential in the development of trustless bridges. OP_CAT co-author Ethan ✨ is on BlueSky✨ Heilman 🐱 and I sat down to discuss debate around this opcode — including why it’s controversial, the cultural environment shaping its future, and why some worry its broad expressivity could pose “unknown risks” to Bitcoin over time. More recently, Ethan co-authored BIP 360 with Hunter Beast 🕯️ — another controversial proposal aimed at addressing Bitcoin’s quantum vulnerabilities. Suffice it to say, there are few people with Ethan's experience in navigating Bitcoin politics and its shifting governance landscape as we move towards ossification over time. In this episode, we cover: - The origins of OP_CAT and why it was included and removed from early Bitcoin - What makes OP_CAT so powerful (and why that worries some developers) - Cultural shifts in Bitcoin governance as its developer community matures - The ‘great covenants debate’ + OPCAT vs. CTV - The path to BIP 360 and why Bitcoin should be ‘quantum ready’ This episode is powered by: - Best In Slot (Best in Slot | BRC2.0 🧑‍🍳), the leading API for Ordinals and BRC20 data aggregation and indexing - Spark (Lightspark), a statechains implementation leading the path towards institutional adoption of Bitcoin-powered payments - Citrea (Citrea), the leading Bitcoin Rollup technology and contributor to the BitVM alliance 📍 Timestamps 00:00 – Intro 00:45 – Bitcoin Privacy and the OP_CAT Proposal 03:18 – Technical Challenges of Adding New Opcodes 07:37 – Politics and Culture of Bitcoin Upgrades 28:46 – Quantum Computing Meets Bitcoin 37:48 – How Governments View Quantum Risk 39:06 – Breaking Down BIP 360 for Developers 42:03 – Post-Quantum Signature Schemes Explained 45:18 – Trade-offs in Quantum Security for Bitcoin 53:16 – Community Reactions to BIP 360 01:00:23 – The Future of Bitcoin in a Post Quantum World

Isabel Foxen Duke⚡️

13,231 views • 8 months ago