Peter Todd

Peter Todd

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@opentimestamps founder pgp: 37EC7D7B0A217CDB4B4E007E7FAB114267E4FA04 🇺🇦🇮🇱🇹🇼

Ukrainians' Vigilance Thwarts Spy, Shows Collective Counter‑Intelligence
SocialMar 9, 2026

Ukrainians' Vigilance Thwarts Spy, Shows Collective Counter‑Intelligence

Good read about real-life counter-intelligence work: https://t.co/vo0s5eCx9F Notable points: 1) @AshtonCirillo immediately reported Noma's attempt to contact to his superiors. That was critical in making the spying fail, and keeping Sarah out of trouble. Ukraine puts a lot of effort into reminding...

By Peter Todd
Governments Censor Data, yet AML/KYC Exposes It
SocialFeb 26, 2026

Governments Censor Data, yet AML/KYC Exposes It

Governments all around the world have tried to censor access to this kind of data. Hilarious that their own AML/KYC fetish is revealing it anyway.

By Peter Todd
Rootstock's Merge‑mining Scheme Proved a Bitcoin‑draining Scam
SocialFeb 19, 2026

Rootstock's Merge‑mining Scheme Proved a Bitcoin‑draining Scam

😂😂😂 Rootstock was obviously scammy from the beginning. Not to mention, their merge-mining plans were obviously harmful to Bitcoin itself. No surprise they'd rugpull investors.

By Peter Todd
Phoenix Wallet Proves Banking Can Be Effortlessly Simple
SocialDec 19, 2025

Phoenix Wallet Proves Banking Can Be Effortlessly Simple

"That was it?" "Yes." "Ok. Banks can go fuck themselves. That was a lot more simple than I thought it was. Incredibly more simple." ^ Me showing a friend @acinq_co's Phoenix wallet for the first time.

By Peter Todd
Bitcoin Art Evolves: Physical Pieces as Proof of Work
SocialDec 17, 2025

Bitcoin Art Evolves: Physical Pieces as Proof of Work

They asked me for a comment; the provenance is secured with @opentimestamps As a 'OG' bitcoiner it's amazing to see Bitcoin grow up so much that Bitcoin artists are doing retrospectives. And in this day and age of AI, physical art...

By Peter Todd
Swiss Gold-Backed CBDC Would Win Over Critics
SocialNov 26, 2025

Swiss Gold-Backed CBDC Would Win Over Critics

Good riddance. If Switzerland did an AML/KYC CBDC 100% backed by gold, presumably these idiots would be all for it... https://t.co/3KgFM5Kj2t

By Peter Todd
Witness Replacement Needs Simple Fee-Rate Increase Rule
SocialNov 26, 2025

Witness Replacement Needs Simple Fee-Rate Increase Rule

Ah! Sorry, I missed the “without all or none” bit. I don't think that's blocked on cluster mempool, as witness replacement is a particularly simple case of replace-by-fee-rate. It only increases the fee-rate, without decreasing the fee. So we can just...

By Peter Todd
Cluster Mempool Concerns Transaction Relationships, Not Taproot Annex
SocialNov 25, 2025

Cluster Mempool Concerns Transaction Relationships, Not Taproot Annex

@reardencode @theinstagibbs Cluster mempool has nothing to do with taproot annex support. It deals with the relationships between transactions. Not their contents.

By Peter Todd
Knots Undermines Bitcoin Security and Decentralization
SocialNov 19, 2025

Knots Undermines Bitcoin Security and Decentralization

Why Knots is an attack on Bitcoin:

By Peter Todd
Wizards Launch New Inscription Standard for BIP‑Knotzi
SocialNov 17, 2025

Wizards Launch New Inscription Standard for BIP‑Knotzi

The wizards created a new inscription standard in honor of BIP-Knotzi. 😂😂😂

By Peter Todd
Lightning From Day One Could've Avoided Bitcoin's 5 Tx/S Limit
SocialNov 17, 2025

Lightning From Day One Could've Avoided Bitcoin's 5 Tx/S Limit

Craig Wright is pissed off that I was talking to @adam3us and @halfin when I was 15. He says it led to Bitcoin being crippled with a 5 tx/second limit. True. Maybe I was spending too much time chatting instead. I might...

By Peter Todd
Criticizes Restricting Bitcoin Use‑cases over Inheritance Risks
SocialNov 13, 2025

Criticizes Restricting Bitcoin Use‑cases over Inheritance Risks

What a ridiculous attitude. “Please limit your so-called ‘use-cases’ for Bitcoin. We can't guarantee that we won't ‘break’ things like cold storage for inheritance.” https://t.co/TxLaAzAdwp

By Peter Todd
Disabling OP_IF Won’t Stop Data Publishing, Signals Authoritarian Control
SocialNov 13, 2025

Disabling OP_IF Won’t Stop Data Publishing, Signals Authoritarian Control

N.B While we haven't actually seen this on mainnet much, the fact that it's a likely pattern for things like inheritance and corporate succession means there is a high likelihood that people have funds that will be using OP_IF in...

By Peter Todd
El Salvador Adopts Bitcoin Timestamps; Governments Should Follow
SocialNov 12, 2025

El Salvador Adopts Bitcoin Timestamps; Governments Should Follow

The El Salvadoran government is pioneering the use of efficient, @opentimestamps based, Bitcoin time-stamping. All governments should be doing this. If you are archiving data, why aren't you time-stamping it?

By Peter Todd
Storing Offline Wallet and Passphrase Together Is Foolish
SocialNov 11, 2025

Storing Offline Wallet and Passphrase Together Is Foolish

“Not everyone is luke-jr whose security practices are to keep a copy of his 'offline' wallet on an online system with a copy of the passphrase for it just stored in a file next to it.” - gmaxwell 🔥🔥🔥 https://t.co/jPNHtwJyW6

By Peter Todd
Git+OpenTimestamps Adds Bitcoin-Backed Data Integrity Layer
SocialNov 11, 2025

Git+OpenTimestamps Adds Bitcoin-Backed Data Integrity Layer

With respect to data integrity, git+opentimestamps is a second layer protocol built on top of Bitcoin. https://t.co/0VMsPbetaH

By Peter Todd
BIP‑Knotz Futures Add Chain‑Split Outcome, Shifts Pricing
SocialNov 10, 2025

BIP‑Knotz Futures Add Chain‑Split Outcome, Shifts Pricing

Note: these on-chain BIP-Knotz futures are _not_ binary futures! They actually have _three_ possible outcomes. 1) Win 2) Lose 3) Chain Split In the third option, a hash power minority mines enough blocks that Knots splits off into a separate currency. In that...

By Peter Todd
Lightning Payments Are Essentially Signed Bitcoin Transactions
SocialNov 10, 2025

Lightning Payments Are Essentially Signed Bitcoin Transactions

Every Lightning transaction is _literally_ a Bitcoin transaction: the underlying HTLC is implemented by offering your counterparty a signed Bitcoin transaction that would allow them to collect money on-chain if needed.

By Peter Todd
HTLCs: Lightning’s Core, Future Bitcoin Adoption Pillar
SocialNov 10, 2025

HTLCs: Lightning’s Core, Future Bitcoin Adoption Pillar

> The consensus was the future of Bitcoin adoption will be built on Lightning. This surprised me a bit. I think people really underestimate how fundamental an advancement HTLCs are. We will probably still be using HTLCs in 100 years (or...

By Peter Todd
EU Sting Operations Threaten Bitcoin Retail Adoption
SocialNov 9, 2025

EU Sting Operations Threaten Bitcoin Retail Adoption

This attitude is very wrong. The EU can do sting operations to enforce this. If they do this, it will crush retail acceptance of Bitcoin in the EU, and among all companies with EU exposure. "Cypherpunks write code" is an idiotic ideology....

By Peter Todd
Set
SocialNov 8, 2025

Set

This is extremely cool. Also it'll probably be totally useless as I highly doubt that Luke and Mechanic are actually confident enough to bet money... BTW, you can make the odds something other than 50:50 using pre-signed transactions as covenants.

By Peter Todd
Bitfinex May Reignite Block Size War with Split Tokens
SocialNov 8, 2025

Bitfinex May Reignite Block Size War with Split Tokens

It's gonna be so awesome if Bitfinex repeats the block size war by creating a market for ₿ split into ₿ and Knotz tokens.

By Peter Todd
Cashu Missing Blocksize Limit Enables Unlimited Data Uploads
SocialNov 6, 2025

Cashu Missing Blocksize Limit Enables Unlimited Data Uploads

Actually the Cashu exploit is even simpler: they forgot to implement the Cashu equivalent of the blocksize limit. Obviously, it there's no limit at all, there's no economic disincentive to uploading an infinite amount of data. Like blocks have a size limit,...

By Peter Todd
Fund a 4x4 for Ukraine via Ark Wallet
SocialNov 5, 2025

Fund a 4x4 for Ukraine via Ark Wallet

Some friends of mine managed to fundraise a used Ford 4x4 for Wild Division. They already have the vehicle, and a volunteer driver. We're just trying to get another ~500€ to pay for the ferry and gas to Eastern Ukraine. So...

By Peter Todd
Samourai Wallet Accused of Logging Xpubs, Facing Fraud Claims
SocialNov 4, 2025

Samourai Wallet Accused of Logging Xpubs, Facing Fraud Claims

I disagree. If it is in fact true that Samourai Wallet was logging xpubs, they should go to jail for that crime. It's fraud to claim something had privacy when it did not. Doubly so given the scale of their FUD...

By Peter Todd
Only 9% of Outgoing Nodes Run V30
SocialNov 2, 2025

Only 9% of Outgoing Nodes Run V30

I've been testing v30 adoption on outgoing, listening, nodes from the point of view of a fresh node connecting to outgoing peers in the usual way. I'm also seeing about 9% v30.

By Peter Todd
Luke Dash Misunderstands Lightning, Thread Exposes Knowledge Gap
SocialOct 28, 2025

Luke Dash Misunderstands Lightning, Thread Exposes Knowledge Gap

This thread between @adam3us and @lukedashjr is very revealing. Luke does not understand how Lightning works. WTF. https://t.co/RZKWifrXpl

By Peter Todd
US Government Blocks Custodia’s Safe, Non‑Lending USD Custody
SocialOct 28, 2025

US Government Blocks Custodia’s Safe, Non‑Lending USD Custody

The backstory here is nuts. tl;dr: Custodia just wants to custody USD directly. They want to store USD without lending it out, for a small fee, to ensure that your USD is completely safe. Obviously, a totally safe option would be good...

By Peter Todd
Old Script Upgraded to Full BIP‑444 Compatibility
SocialOct 26, 2025

Old Script Upgraded to Full BIP‑444 Compatibility

Done with a decade old script that doesn't even use segwit, let alone taproot. 100% standard and fully compatible with @LukeDashjr's BIP-444.

By Peter Todd
New C‑SCAM Attack Exploits Censoring Reorgs for Double‑Spend
SocialOct 26, 2025

New C‑SCAM Attack Exploits Censoring Reorgs for Double‑Spend

This is actually going to create a new “C-SCAM” attack: if you want to cheat on an exchange, do a deposit and simultaneously do a transaction with some “cheese-pizza” image in it. If it confirms, withdraw from the exchange, and wait...

By Peter Todd
BIP-444 Enables C‑SCAM Censoring Reorg Double‑Spend Attack
SocialOct 26, 2025

BIP-444 Enables C‑SCAM Censoring Reorg Double‑Spend Attack

This. BIP-444 creates a “C-SCAM” attack where you use censoring reorgs to double spend.

By Peter Todd
Luke Claims Legal Threats Will Force Soft‑fork Adoption
SocialOct 26, 2025

Luke Claims Legal Threats Will Force Soft‑fork Adoption

Luke is being very clear the the expects his soft-fork to get adopted due to legal threats. https://t.co/17lkaxKnz1

By Peter Todd
Looking for Trezor Purchase Options in Lugano
SocialOct 24, 2025

Looking for Trezor Purchase Options in Lugano

Does anyone know where I can buy a Trezor in Lugano? They don't seem to have a booth at the @planb_network conference. :/ Asking for a friend.

By Peter Todd
Discovery Claim: Satoshi Identified by PlanB Network
SocialOct 24, 2025

Discovery Claim: Satoshi Identified by PlanB Network

Found Satoshi @planb_network https://t.co/FcziA55JVa

By Peter Todd
Lightning Requires On‑Chain Proof of Arbitrary Data Publication
SocialOct 20, 2025

Lightning Requires On‑Chain Proof of Arbitrary Data Publication

“Concretely, let’s start with this trivial example: breach transactions in Lightning publish hashes on chain.” Heh, I was using that exact example with someone the other day. It's a good one. Lightning absolutely needs proof-of-arbitrary-data-publication to work.

By Peter Todd
Signal Should Add Bitcoin; MobileCoin Is a Flop
SocialOct 16, 2025

Signal Should Add Bitcoin; MobileCoin Is a Flop

https://t.co/hYvF1puD5U I'm one of the judges who gave this project a well-deserved first place at the @btcplusplus hackathon. I've been wanting to try MobileCoin. But it's such a failure I can't even buy any. @signalapp needs to accept reality and just add Bitcoin...

By Peter Todd
Make Expired UTXOs Removable to Prune Bitcoin's State
SocialOct 16, 2025

Make Expired UTXOs Removable to Prune Bitcoin's State

A much better idea is to make UTXOs eventually become undependable, allowing them to be removed from the UTXO set. E.g. zero value UTXOs could last a year or two (CSV timeouts have similar max time-frames).

By Peter Todd
New Consensus Rule Caps Bitcoin Withdrawals per Block
SocialOct 16, 2025

New Consensus Rule Caps Bitcoin Withdrawals per Block

Re: hourglass, you can limit rate of ₿ withdrawal by making the consensus rule be that only one output is allowed to have a different scriptPubKey, and that output can have a maximum N ₿ value; other outputs have the...

By Peter Todd
Bitcoin Users Must Embrace Cash Payments for Stability
SocialOct 15, 2025

Bitcoin Users Must Embrace Cash Payments for Stability

Bitcoiners paying with cash. This is something that needs to happen a lot more often. Without cash we're all fucked. https://t.co/OSNMCoTRiy

By Peter Todd