Jameson Lopp

Insights on security, privacy, technology, & money · Casa Co-founder & Chief Security Officer · https://bitcoin.page

Public Key

npub17u5dneh8qjp43ecfxr6u5e9sjamsmxyuekrg2nlxrrk6nj9rsyrqywt4tp

NIP-05 Address

Profile Code

nprofile1qqs0w2xeumnsfq6cuuynpaw2vjcfwacdnzwvmp59flnp3mdfez3czpspp4mhxue69uhkummn9ekx7mqpr3mhxue69uhkummnw3ezucnfw33k76twv4ezuum0vd5kzmqpr4mhxue69uhkummnw3ez6ur4vgh8wetvd3hhyer9wghxuet5qythwumn8ghj7mn0wd68ytnvdac8qtnnda3kjctvqy28wumn8ghj7un9d3shjtnyv9kh2uewd9hszynhwden5te0wp6hyurvv4cxzeewv4esz8648q

Publishing to

nos.lol

nostr.bitcoiner.social

nostr-pub.wellorder.net

nostr.lopp.social

relay.damus.io

purplepag.es

Author Public Key

npub17u5dneh8qjp43ecfxr6u5e9sjamsmxyuekrg2nlxrrk6nj9rsyrqywt4tp

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Last Notes

2026-08-02 23:45:08 UTC

gn
#nevent1q…6dfz

2026-08-01 22:32:07 UTC

Freedom isn't free.
#nevent1q…336g

2026-08-01 19:55:31 UTC

I really appreciate the Ask Gemini feature on YouTube. When I'm searching for an exact timestamp of when something was said on a lengthy podcast/ presentation, it does a great job finding the quote and saving me the time of having to rewatch the video.

2026-08-01 17:43:59 UTC

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The fork is hard coded to start rejecting blocks in 1 week. Chain split is practically guaranteed.

2026-08-01 17:43:01 UTC

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Rent free?
The first failure of a UASF is a historic event that will be precedent setting for future Bitcoin governance plays.

2026-08-01 17:41:20 UTC

Linux desktop market share has broken through 10% in North America 🎉
https://preview.redd.it/mq8iwv8z1sgh1.jpeg?width=940&auto=webp&s=51c05fe63f53f7f0bff4a3cd10321c0237d50f56

2026-08-01 15:53:34 UTC

Looks like 2 busy back to back weekends for technical bitcoiners.
This weekend we work to save folks from losing their funds.
Next weekend we kick back and laugh at fools as they fork themselves into oblivion.

2026-08-01 10:26:40 UTC

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Yes, many of us have met him in person.

2026-07-31 16:06:28 UTC

Yep.
https://blog.lopp.net/knot-a-serious-project/

2026-07-31 14:53:47 UTC

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As long as you don't have a signing threshold of keys on coldcards, yes. Though you should consider coldcard keys to be compromised and rotate them out with a freshly generated key at your convenience.

2026-07-31 12:01:52 UTC

gm from the self custody security trenches
https://npub17u5dneh8qjp43ecfxr6u5e9sjamsmxyuekrg2nlxrrk6nj9rsyrqywt4tp.blossom.band/ac2d7018b71cd50fbfc7a687aeba223c3d3a351300cf0d43f0dbf1e116efcb1d.jpg

2026-07-29 19:45:28 UTC

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Luke as Trump, firing the miners

2026-07-29 19:29:26 UTC

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It's a great mp4!
Some say it's the BEST mp4...

2026-07-29 18:02:28 UTC

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Indeed, it's an endless source of entertainment!

2026-07-28 16:07:08 UTC

2 weeks to steepen the curve of BIP-110 hashrate!
Not looking good; Bitcoin seems to be vaccinated against bullshit.

2026-07-28 16:04:22 UTC

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Prepare to get rekt in 2 weeks 😘

2026-07-28 16:03:24 UTC

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Peter and I are early adopters for controversy.
We're also the "bad actors" that puritans are trying to stop, so we find these efforts to be particularly amusing 😏

2026-07-27 18:04:48 UTC

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Maybe a network issue on your end, loads fine for me.

2026-07-26 18:12:27 UTC

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Yeah that one is sus

2026-07-26 17:04:27 UTC

https://npub17u5dneh8qjp43ecfxr6u5e9sjamsmxyuekrg2nlxrrk6nj9rsyrqywt4tp.blossom.band/e741ab024219454c354eac8126d2f97df2b29d595bf87c94ac05245cd04bc4f5.jpg

2026-07-26 15:20:21 UTC

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The problem with vagueposting is that it's neither here nor there.

2026-07-26 13:54:00 UTC

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I dunno that there's much distinction. They're upset about the end result moreso than who actually pushed the button.

2026-07-26 13:19:33 UTC

2 weeks until BIP-110 nodes blow up!
Follow along at bip110.com
https://npub17u5dneh8qjp43ecfxr6u5e9sjamsmxyuekrg2nlxrrk6nj9rsyrqywt4tp.blossom.band/15605b42b94b33894eee947bb9c13f5c875ee3704a5cd8e9da9d7bb3955b7090.jpg

2026-07-25 20:26:39 UTC

The U.S. Justice Department is prosecuting an American for allegedly providing U.S. border authorities with a passcode that wiped the contents of his phone, according to an indictment and media reports.
This is thought to be the first known case in the United States where federal prosecutors have charged someone for the alleged destruction of data using a “duress” password built into a phone’s software.
The case centers on a feature included in GrapheneOS, a custom Android operating system that runs in place of the software on most modern Google Pixel devices. Tunick’s attorneys confirmed GrapheneOS was running on his phone.
https://techcrunch.com/2026/07/24/us-accuses-american-of-allegedly-wiping-his-phone-using-a-duress-password-during-border-search/

2026-07-25 02:21:14 UTC

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Without replay protection, only a Bitcoin Wizard will be able to safely split their 110 coins.
And yet, even having done that, they will be unable to find a venue in which to sell them.
The game you envision simply does not exist.

2026-07-24 11:55:37 UTC

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There's a non-zero chance your house gets obliterated by a meteorite today. How much effort are you going to put into preparing for that event? 😏

2026-07-23 13:26:41 UTC

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Imagine thinking there are 15,000 people running BIP-110 when there are clearly MULTIPLE Sybil attacks going on to inflate node counts. 🤡🤡🤡

2026-07-23 00:16:38 UTC

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Now this is an appropriate nostr post; keep nostr weird!

2026-07-22 15:47:01 UTC

I find the sociological aspects of BIP-110 to be far more interesting than the technical aspects. 110 supporters admit it's not a technical solution; the BIP itself admits it can't stop arbitrary data.
But what's fascinating is the Bitcoin Puritans claim they are trying to fix "Bitcoin Culture" at the "social layer" by rejecting "woke Core developers."
What's amusing about this is I see little difference between puritans and the woke folk they detest. AFAICT the only distinction is which particular attributes each group uses to select people for cancellation.
Fuck woke mobs.
Fuck puritan mobs.

2026-07-22 10:32:56 UTC

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It is truly wild how many bitcoiners still don’t run a node but instead choose to trust a third party to validate transactions.

2026-07-21 15:56:37 UTC

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Retarded comparison as usual; of course NFT fees are high as a percentage of the output value because they're sending less than a dollar worth of BTC. Such use cases could easily end up spending thousands of percent in fees relative to the output value.
Ultimately you still have yet to realize that you're making bcash arguments. Bitcoin does not guarantee low fees for anyone, it only offers a free market for block space.

2026-07-21 14:58:32 UTC

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UTXO creation occurs when you deposit bitcoin in an address.
Segwit does many things, the increased block weight limit does allow for more throughput. The discount is complicated and a rough estimation rather than precisely tuned for every script type.
#nevent1q…v8gq

2026-07-21 11:29:41 UTC

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The only value this chart has is humor value.

2026-07-21 10:41:01 UTC

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It's complicated.
A transaction output:
* is stored in the UTXO set until spent,
* has to be maintained by validating nodes,
* contributes to the state that nodes need for future validation.
By contrast, when that output is eventually spent, much of the data required to authorize the spend—especially signatures—is transient validation data. Once the spend is confirmed, the old UTXO can be deleted from the UTXO set.
So there is a desirable incentive structure:
UTXO creation should be relatively expensive
and
UTXO consumption should be relatively cheap
The witness discount moves Bitcoin in that direction.
Example: P2WPKH
A typical native SegWit P2WPKH input is roughly:
* 41 non-witness bytes → 41 x 4 = 164 WU
* about 107 witness bytes → 107 WU
Total: 271 WU / 67.75 vbytes
A P2WPKH output is 31 bytes, all non-witness:
31 x 4 = 124 WU = 31 vbytes
So consuming a UTXO still costs more than creating one, but the difference is much smaller than it would be if the signature received no discount.
Without the witness discount, that same input would be roughly:
41 + 107 = 148 bytes
versus only 31 bytes for the newly created output.
That would give users a fairly strong incentive to create lots of outputs because creation looks cheap, while later consolidation looks expensive.
With the discount, the ratio is closer to 68 vB input : 31 vB output rather than 148 : 31.
Why this matters for UTXO growth:
Suppose you receive ten small payments.
Later, you want to combine those ten UTXOs into one.
A consolidation transaction has:
* many inputs, which **destroy UTXOs**
* few outputs, which **create UTXOs**
Bitcoin arguably wants such transactions to be reasonably cheap because they reduce the global UTXO set.
The witness discount helps enormously here because most of the bulky part of each input—the authorization data—is discounted.
Conversely, a transaction with:
* one input
* twenty outputs
creates nineteen additional UTXOs.
Those twenty outputs receive **no witness discount**. Their bytes count at the full 4 WU/byte rate.
So the weight system implicitly taxes UTXO proliferation more heavily than it otherwise would.

2026-07-21 10:16:43 UTC

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Spending Bitcoin

2026-07-20 22:28:45 UTC

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Not sure how wicked is doing this calculation, though 110 did have 1% in the previous signaling period.

2026-07-20 22:24:02 UTC

Dune: Part 3 comes out in December...
https://npub17u5dneh8qjp43ecfxr6u5e9sjamsmxyuekrg2nlxrrk6nj9rsyrqywt4tp.blossom.band/03ae7e4953633983ad44e706f15cf2259f74c06176080ef6af080c76a1aea6a1.jpg

2026-07-20 21:43:48 UTC

As you're probably aware, BIP-110 is not particularly popular.
However, here's an interesting perspective: BIP-110 has 3X the hashrate of the entire Bitcoin Cash network!
https://npub17u5dneh8qjp43ecfxr6u5e9sjamsmxyuekrg2nlxrrk6nj9rsyrqywt4tp.blossom.band/40400c935bd7c617477a020d5777ac6aabb7846f988c4185cbe63b75c8ed6cf1.jpg https://npub17u5dneh8qjp43ecfxr6u5e9sjamsmxyuekrg2nlxrrk6nj9rsyrqywt4tp.blossom.band/eb804bc55ad5c63a3d2b6b255491a5d883709a51461f3aceb5daf29303473912.jpg

2026-07-20 20:38:10 UTC

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I sure hope so. I know the Google social engineers are watching me on X because I've had them call me back after posting our calls.

2026-07-20 19:36:16 UTC

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Oh we will, just need to get it nicely packaged up first.

2026-07-20 19:25:39 UTC

A North Korean made the mistake of showing up to a job interview with me today.
I recorded video of myself asking him some extremely uncomfortable questions 😏
https://npub17u5dneh8qjp43ecfxr6u5e9sjamsmxyuekrg2nlxrrk6nj9rsyrqywt4tp.blossom.band/9302467fa921ccca853d10a36d80d7055cbbaf787d3497e5266c11262cf1ff46.jpg

2026-07-20 14:41:03 UTC

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Imagine thinking that Knotzi hash renters are a non-trivial client segment for Braiins.
The walls of your echo chamber keep closing in!

2026-07-20 01:51:56 UTC

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The discount exists to correct an imbalance between the cost of creating utxos and the cost of consuming utxos.
Removing the discount would result in incentives that make it likely for the utxo set to grow even faster.

2026-07-20 01:50:34 UTC

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2026-07-19 18:09:11 UTC

We are all Dathon Pwn
https://npub17u5dneh8qjp43ecfxr6u5e9sjamsmxyuekrg2nlxrrk6nj9rsyrqywt4tp.blossom.band/bbb52efb1e4b35c46aa82f40c749db3043cb7ed70f211998137306ba52e47b8b.jpg

2026-07-19 15:04:55 UTC

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Bitcoin Core went to the trouble of drafting and publishing a statement over a year ago regarding relay policies: https://bitcoincore.org/en/2025/06/06/relay-statement/
In order to answer the second question you'd have to figure out how many transactions are showing up in blocks that were never broadcast across the network, which can be pretty tricky to do.

2026-07-19 14:17:55 UTC

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You think Core changing the policy was a "dumb call" - do you understand they they were reacting to the network already routing around said policy and thus rendering it ineffective? Thus, keeping the policy in place was actually detrimental to nodes and impairing their ability to predict what transactions will be in the next block.
https://pbs.twimg.com/media/HKuZMvXWMAAKFOD?format=jpg&name=4096x4096

2026-07-18 23:53:29 UTC

When you realize your entire economy runs on a monetary system that is backed by nothing but faith in the authorities who control it.
https://npub17u5dneh8qjp43ecfxr6u5e9sjamsmxyuekrg2nlxrrk6nj9rsyrqywt4tp.blossom.band/77073364cfa2da56a65245b00614e9d324d3794fd5aeb93d53e544399a9aacbe.jpg

2026-07-18 20:30:33 UTC

Yet another consensus bug found in BIP-110 and it certainly ain't the last.
https://blockslop.dev/

2026-07-17 20:02:07 UTC

What goes up must come down.
It ain't rocket science!
https://npub17u5dneh8qjp43ecfxr6u5e9sjamsmxyuekrg2nlxrrk6nj9rsyrqywt4tp.blossom.band/d8250428bf47a17640a07e0a161b15be3a41f7e43ea84453243e6f0a57f0a7be.jpg

2026-07-17 15:18:55 UTC

https://npub17u5dneh8qjp43ecfxr6u5e9sjamsmxyuekrg2nlxrrk6nj9rsyrqywt4tp.blossom.band/1d1a893528d78fa291f000f761ca86886e2a0247529621f230e15f5120bfdbee.jpg
They roll in before the opening bell,
With cold brews, cold wallets, and stories to sell.
Laser eyes glowing from the screens in the room,
Saying, "freedom is coming" right after the boom.
They bought at ten thousand, they brag every day,
Then dump on the crowd when the price runs away.
While the night-shift driver keeps stacking his sats,
They're buying up condos and digital cats.
Oh, the whales on Wall Street are swimming in green,
Preaching decentralization from a limousine.
They say, "trust no banker," then they borrow from three,
Put the risk on the public and take profits for free.
Yeah, they toast to the future when the candlesticks rise,
With a bull on their cufflinks and charts in their eyes.
The blockchain remembers, though the headlines retreat
All the rich Bitcoin cowboys down on Wall Street.
There's a podcaster prophet in a ten-grand chair,
Saying fiat is dying, so you'd better prepare.
He's got exchanges as sponsors, a course you can buy,
And a nice stash of dollars for when markets run dry.
He calls himself sovereign, untamed and elite,
But he panics when regulators schedule a meet.
Then he tweets, "Keep on hodling, don't live in fear,"
While quietly selling as panic draws near.
Oh, the whales on Wall Street know the language of need,
Turning dreams of freedom into leverage and greed.
They'll shout "BITCOIN ONLY" 'til the market turns red,
Then the workers hold bags while the whales move ahead.
Still the blocks keep on building, every transfer complete,
No applause, no forgiveness, no erased balance sheet.
And the price keeps on dancing to a billionaire beat
For the rich Bitcoin cowboys down on Wall Street.

2026-07-17 13:17:52 UTC

Saw a guy with this shirt today 😅
https://npub17u5dneh8qjp43ecfxr6u5e9sjamsmxyuekrg2nlxrrk6nj9rsyrqywt4tp.blossom.band/dcf1ff98556d3a4c19c33a68fb659e38c68c0d5c9bfda3b58e22f352c0899511.jpg

2026-07-17 10:22:39 UTC

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... is retarded and doomed to fail.

2026-07-16 17:15:10 UTC

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I recommend 48 hours.

2026-07-16 12:51:34 UTC

Bitcoin Core v32 will sync 30% - 40% faster due to parallelization improvements! 🎉
https://npub17u5dneh8qjp43ecfxr6u5e9sjamsmxyuekrg2nlxrrk6nj9rsyrqywt4tp.blossom.band/7179632501dcf694d756d2684faee24843ddbf6674ea6537504d57c9ef474f2b.jpg

2026-07-15 12:08:12 UTC

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You're selling Bitcoin NFTs?
Looks like you're a shitcoiner now 😏

2026-07-14 18:52:57 UTC

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Yes, you're an ignorant fool if you believe that objective code somehow gets tainted if its author is impure according to your subjective perspective.

2026-07-14 16:52:49 UTC

What fresh hell is this?
https://npub17u5dneh8qjp43ecfxr6u5e9sjamsmxyuekrg2nlxrrk6nj9rsyrqywt4tp.blossom.band/9adf4c385f20784b01315dc1ee3e3aa392d1b78262564b0744fff50ae3b7358f.jpg

2026-07-14 12:52:39 UTC

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You ignorant fool, you don't have to trust @nprofile…5pxz because the fork futures contract is open source code that you run yourself.
If you can't read the code then you can hire someone else or have your favorite LLM audit it. Or you can just keep posting retarded vitriol 😘

2026-07-14 12:49:27 UTC

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This is why I prefer archive.today

2026-07-13 22:06:15 UTC

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(from the perspective of the nodes)

2026-07-13 21:56:45 UTC

OMG yasssss
(please don't fuck it up)
https://npub17u5dneh8qjp43ecfxr6u5e9sjamsmxyuekrg2nlxrrk6nj9rsyrqywt4tp.blossom.band/43204e7079e02fc019e1645af817fba7936afaf3b36f62160b5b240dbe426d90.jpg

2026-07-13 18:56:16 UTC

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Thank goodness no one is rejecting BIP-110, we're just ignoring it and allowing it to wither away into irrelevance!

2026-07-13 18:54:35 UTC

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Grab your popcorn, it's gonna be entertaining!

2026-07-13 12:38:14 UTC

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False. There's no centralized exchange required for @nprofile…5pxz's fork futures contract. You clearly didn't look into it.

2026-07-13 11:11:37 UTC

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Liar. Rob built a trustless p2p futures contract. No third party required.

2026-07-12 20:52:43 UTC

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Liar 🤣

2026-07-12 20:52:03 UTC

Just got another google social engineering bot call so I expect to have a live human on the line within an hour.
What questions should I ask the social engineer?

2026-07-12 12:51:21 UTC

Looks like my favorite season has arrived.
Forced Congressional retirement season.

2026-07-11 21:59:06 UTC

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It's hilarious to me that these gun at the table images are always created by folks unfamiliar with guns.
It's easy to spot because the gun orientation is always wrong, based upon how you would pick it up with a given hand.

2026-07-11 19:36:26 UTC

You can watch the Bitcoin Spam War live in realtime at https://bitcoin-spam-war.vercel.app/

2026-07-10 22:03:46 UTC

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Undecylenic acid. Brand name is neomen.

2026-07-10 18:35:34 UTC

*chef's kiss*
https://npub17u5dneh8qjp43ecfxr6u5e9sjamsmxyuekrg2nlxrrk6nj9rsyrqywt4tp.blossom.band/9f8f79e36cbcf09ec26afb73cfebf93fa373d1ad7da6683d5b352694c4a82b48.jpg

2026-07-10 18:28:31 UTC

My doctor prescribed a nail polish to combat toenail fungus, which is unsightly but otherwise not a big deal.
After applying it every day for a year, there were no noticeable changes.
So I went to my favorite LLM and described the problem. It pointed me to an over the counter product. 1 month later and the fungus is no longer among us.
We've been warned for years not to diagnose ourselves via online resources, but now I'm not so sure...

2026-07-10 12:19:46 UTC

Look on the bright side: at least you don't have an explosive diarrhea parasite.
https://www.wtsp.com/article/news/health/cyclosporiasis-spread-stomach-parasite-diarrhea-florida-tampa-cases/67-d62577ea-c9f7-40bc-85b9-24dcc5eb593c

2026-07-09 13:20:10 UTC

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Stuff like this https://blog.casa.io/evolving-casas-defenses-against-social-engineering/

2026-07-09 12:04:26 UTC

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Ghost makes it easy, just set up a mailgun account and set the API key in ghost.

2026-07-08 22:17:41 UTC

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I've had tomato jam, that ain't ketchup.

2026-07-08 21:36:39 UTC

If tomatoes are fruit, is ketchup a smoothie?

2026-07-08 20:36:59 UTC

I'm getting so good at chatting with social engineers that one of them called me back the next day just to shoot the shit. 😏

2026-07-08 17:47:47 UTC

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Bitcoin is a globally distributed database to keep track of the current state of money ownership. Thus, the properties of that database and the incentives for interacting with it are rather relevant.

2026-07-08 17:44:58 UTC

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Self hosted ghost instance.

2026-07-08 12:03:41 UTC

1 month until all BIP-110 nodes get forked off the Bitcoin network; bookmark https://bip110.com to follow along the exciting countdown!

2026-07-07 19:56:21 UTC

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Stated differently: there are many alternative Bitcoin clients. Only one has an insane solo maintainer.

2026-07-07 19:54:57 UTC

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What are you going to do about it? Cry harder?

2026-07-07 14:18:08 UTC

Old and busted: trolling Knotzis.
New hotness: trolling social engineers.
https://blog.casa.io/a-social-engineering-story/

2026-07-06 23:13:36 UTC

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I'm only interested in knowing what you intend to do about it if you actually have a novel proposal. I'm generally uninterested in grievance merchants.

2026-07-06 20:52:23 UTC

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I see you moved the goalposts from "original script" to "live script" 😏
Your question is unclear. If you're referring to the Lugano panel where Luke and Mechanic insisted on ad hominem fallacies that Peter and I are bad actors, my goal was to get them to admit they were planning a consensus change rather than relying on relay policies.
But they have no balls, so they stuck to slinging bullshit propaganda which was hilarious when they announced BIP-118 48 hours later.
But my point remains: brainwashed puritans can hate me all they want, it will accomplish nothing.

2026-07-06 20:19:56 UTC

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Nobody is skipping it. Well, Knotzis think they can...

2026-07-06 20:18:41 UTC

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Foolish nobody, you can literally add data to script via OP_PUSHDATA and manipulate it with a variety of other opcodes.
https://opcodeexplained.com/

2026-07-06 19:29:37 UTC

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Witness discount still makes sense to improve the incentive mismatch between creating and consuming utxos.

2026-07-06 18:40:45 UTC

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Satoshi understood that Bitcoin is programmable money that uses a distributed database to create consensus for the current state of the system. After all, Satoshi implemented the programming language for Bitcoin script.

2026-07-06 16:14:02 UTC

Satoshi was a shitcoiner according to the Bitcoin Puritans 😬
https://npub17u5dneh8qjp43ecfxr6u5e9sjamsmxyuekrg2nlxrrk6nj9rsyrqywt4tp.blossom.band/3a6f6c6f87316458565669b71820f960e47023f0b5ffad597198cf14c341604c.jpg

2026-07-04 23:54:20 UTC

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Well his fake email to phish me went to my spam folder. Then his excuse for why I did receive the email was some bullshit about the hackers in my account putting up a firewall 😂
Then he told me to go to his phishing site by spelling out the URL and it was a fake form hosted on Google Sites which is their free web hosting service.

2026-07-04 21:55:01 UTC

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To learn their tactics and screw with them.

2026-07-04 20:45:24 UTC

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Sounded like an American teenager.

2026-07-04 20:25:49 UTC

Just spent 10 minutes on the phone with a Google social engineer, recorded the whole thing.
It may be a holiday for us, but attackers love to strike on holidays when our guards are down!

2026-07-04 18:53:18 UTC

Haters gonna hate. https://npub17u5dneh8qjp43ecfxr6u5e9sjamsmxyuekrg2nlxrrk6nj9rsyrqywt4tp.blossom.band/09ce785a8452e4e94eb6944bc1f8c3cf8f64ff6d926c0ce5b4e20bc1f365664c.jpg

2026-07-04 15:26:08 UTC

The price of liberty is eternal vigilance.
250 years down...

2026-07-03 22:32:09 UTC

If you wish to actively fight against arbitrary data being embedded in the Bitcoin blockchain then you need to impose a regime of arbitrary rules that are reactive to each new use of the protocol that is considered Haram.
I think the conflict can be distilled down to a single trade-off: would you rather have a Bitcoin with arbitrary data or a Bitcoin with arbitrary rules?