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

nprofile1qqs0w2xeumnsfq6cuuynpaw2vjcfwacdnzwvmp59flnp3mdfez3czpspp4mhxue69uhkummn9ekx7mqpzpmhxue69uhkummnw3ezuamfdejsjhw02x

Publishing to

Author Public Key

npub17u5dneh8qjp43ecfxr6u5e9sjamsmxyuekrg2nlxrrk6nj9rsyrqywt4tp

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Last Notes

2026-04-02 15:10:36 UTC

Nostriches not affected.
https://npub17u5dneh8qjp43ecfxr6u5e9sjamsmxyuekrg2nlxrrk6nj9rsyrqywt4tp.blossom.band/be95bfc2b3af4cca0862fddc792cf51bc6a7c2e6c4a528f638dab8a749f59a23.jpg

2026-04-02 12:56:21 UTC

https://i.redd.it/nrzq3u8yyqsg1.gif

2026-04-01 12:47:48 UTC

I'm pleased to announce that Bitcoin Core and Bitcoin Knots have reached an agreement to merge and activate BIP-110 before the August deadline!
https://npub17u5dneh8qjp43ecfxr6u5e9sjamsmxyuekrg2nlxrrk6nj9rsyrqywt4tp.blossom.band/2f7e9800a66997b7a8b3b8ca0604f29f07ab1cdff923a5a484ff9b61d5e931ed.jpg

2026-04-01 07:10:39 UTC

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More algorithmic efficiency improvements, but still need a ton of other improvements to make physical qubits scale. Unclear how hard that will be.

2026-03-31 17:38:32 UTC

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We're in a quantum state of being fucked.

2026-03-31 16:29:00 UTC

What is FUD?
Showing that advancements are being made in the area of quantum computing is not FUD. Significant advancements are being made at a regular rate.
Claiming to know how many years of more advancements it will take before a cryptographically relevant quantum computer is built... that is FUD.
#nevent1q…8v7z

2026-03-31 16:26:02 UTC

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LLMs rebalance the asymmetry.
I was able to have an LLM analyze the recent papers and point out which of the assumptions they rely upon were the weakest and explain why. Only took a couple minutes.

2026-03-31 07:49:44 UTC

https://npub17u5dneh8qjp43ecfxr6u5e9sjamsmxyuekrg2nlxrrk6nj9rsyrqywt4tp.blossom.band/7690f3c42874555adf6ec8751b5b4a4eed0d9e3d2cfe19b66112987574729bd0.jpg

2026-03-30 12:22:47 UTC

One pleb's slop is another pleb's steak.

2026-03-29 19:57:45 UTC

Lord give me the confidence of the man who takes phone calls while shitting in a public restroom.

2026-03-29 18:49:41 UTC

You can just ignore idiots.

2026-03-28 18:40:10 UTC

https://npub17u5dneh8qjp43ecfxr6u5e9sjamsmxyuekrg2nlxrrk6nj9rsyrqywt4tp.blossom.band/8c9a025ba3381ceace69a22197ada898cdf7cf620506198d49d9b959c5f58e94.jpg

2026-03-27 21:35:54 UTC

For a golfer, Tiger sure is a terrible driver!
https://npub17u5dneh8qjp43ecfxr6u5e9sjamsmxyuekrg2nlxrrk6nj9rsyrqywt4tp.blossom.band/d04189ad298075c5e1e22483d552203665df93e91107c7f7fb72d110f08d53e4.jpg

2026-03-27 17:57:39 UTC

I recently watched a documentary about the Manosphere and concluded that its existence is the result of poor / missing father figures.
#nevent1q…9vap

2026-03-27 17:55:13 UTC

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You're crying about half of Core pull requests (that have been peer reviewed) being merged by a single maintainer and in the same breath you're suggesting people run Knots...
Knots is even worse, with 100% of pull requests merged by a single maintainer, many without even being peer reviewed!
https://blog.lopp.net/knot-a-serious-project/

2026-03-27 10:10:40 UTC

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You're welcome to fork yourself off the network with your fellow nutjobs in August 😁

2026-03-26 19:17:32 UTC

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Are you using a VPN?
A year or so ago they changed it to block logins from VPNs though once you get a session token they don't block the VPN.

2026-03-26 19:15:20 UTC

Asked a friend in the Air Force if he thought he'd get sent to Iran and instead of saying yes or no he said "I go wherever they send me." 🫠

2026-03-26 17:16:19 UTC

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Weird take. As far as we're aware, it's neither well funded nor has any developers or code.
My main point all along is that if you truly want to be independent of Core, it's best not to be a downstream fork of Core.
Ask me how I know.

2026-03-26 16:29:31 UTC

Just logged into a service and my TOTP 2FA code was 696969 😏

2026-03-26 14:09:00 UTC

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One would imagine that would be simpler and more effective than creating Yet Another Core Fork.

2026-03-26 13:28:56 UTC

We desperately need more Bitcoin client implementations... if you conveniently ignore the fact that there are half a dozen independently maintained from-scratch implementations!
#nevent1q…advu

2026-03-25 21:23:57 UTC

Folks are using AI slop to spice up real estate listings 🙄
https://www.zillow.com/homedetails/6160-Carrollton-Ave-Indianapolis-IN-46220/1245994_zpid/

2026-03-25 14:09:36 UTC

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Stpe 1: build time machine

2026-03-25 13:56:47 UTC

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We stopped selling those 5 years ago.

2026-03-25 13:45:22 UTC

At @nprofile…f2s8 we've been exploring how to leverage AI while being cautious about the undeveloped state of security for this fast-changing toolset.
We still had an AI security incident recently that falls into a pattern that is becoming increasingly common.
https://blog.casa.io/dont-trust-clankers-ai-agents-are-dangerously-helpful/

2026-03-24 23:36:28 UTC

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Right; they know they need to piggyback off of Core's development process.

2026-03-24 23:34:55 UTC

One belief I have that keeps me optimistic about Bitcoin's future is that the system runs on the actions of rational, self-interested actors.
Irrational propagandists have no power here.

2026-03-24 18:39:52 UTC

Beautiful
https://npub17u5dneh8qjp43ecfxr6u5e9sjamsmxyuekrg2nlxrrk6nj9rsyrqywt4tp.blossom.band/00e29c88db637b000164520ea6cdc2a05b184386135d41127b9334b7a2a54a40.jpg

2026-03-24 18:23:25 UTC

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Funny that you love the process that has led to Core being the most battle tested, yet the process is so terrible it must be completely thrown out the window.

2026-03-24 18:18:50 UTC

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There are already half a dozen independently maintained from-scratch Bitcoin clients.
I don't expect Yet Another Core Fork to change much.

2026-03-24 18:16:38 UTC

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Knotzis will find themselves acting in the same way after their fork fails.
I guarantee it.

2026-03-24 12:10:13 UTC

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Knots with fewer nuts.

2026-03-23 16:59:12 UTC

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There are already a half dozen built-from-scratch implementations being actively maintained.
How does Another Core Fork change anything?

2026-03-23 14:00:49 UTC

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Relays only store text, right? Don't you mean media hosts?

2026-03-23 12:28:03 UTC

Let's play a game I like to call "Spot the Sybil Attack" 🙂
https://image.nostr.build/de043cc1452aafdba9cd7f94c57a4053952094fc7d4fe408aa5a2628cbee61ab.jpg

2026-03-23 03:38:29 UTC

Consider that the dumbest person you know is repeatedly being told 'you are absolutely right' by an LLM.

2026-03-22 18:18:10 UTC

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Monero has objectively stronger privacy than Bitcoin.

2026-03-22 18:08:39 UTC

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Probably some cypherpunk.

2026-03-22 14:46:39 UTC

https://image.nostr.build/7377fb4269fd13f39795d0d7a274e726e7a958670f253808455867229627acb1.jpg

2026-03-21 17:14:15 UTC

Pretty neat dashboard tracking stablecoin censorship: https://stables.rip

2026-03-19 19:59:50 UTC

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For sure. The stands just needed some dusting off and they're good to go!

2026-03-19 19:58:51 UTC

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I wouldn't be so sure about that. Pretty much any tire with a car's weight on it will start to deform after several months of inactivity.

2026-03-19 19:57:38 UTC

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It's not a fiat, they don't make cars that I find particularly enjoyable 😎

2026-03-19 19:27:13 UTC

Had to lift my fancy sports car off the ground because I'll be globetrotting for many months and the manual warns of tire deformation.
Naturally, the floor jack I've owned for 20 decided to stop working. Turns out you're supposed to do regular fluid changes on jacks 😅

2026-03-19 18:35:20 UTC

https://image.nostr.build/feee4f87996b60e9f8418c690a011ddb5e1b8e5a4075684924a884bbd03a42ce.jpg

2026-03-18 21:09:24 UTC

https://image.nostr.build/b3ddb7fc1f1f95cdd2fd991ba37a87c949c16e7d462f2ae6bf0931342a16281a.jpg

2026-03-18 17:18:25 UTC

What it's like being Chief Security Officer
https://image.nostr.build/20af0ed7fe68c6b0c150beb049aaa7a006adf32432cf71c032bb689c7f090f0e.jpg

2026-03-16 13:13:25 UTC

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Soft forks in the sense that they're mainly removing content.
Hard in the sense they're hosted on different domains.

2026-03-16 12:08:32 UTC

In an amusing twist there are now multiple Puritan forks of my Bitcoin educational resources web site because the original group has split from being pro Knotzi to being mostly anti Knotzi, so there's now a fork of my site for each stance. 🤣

2026-03-15 14:43:38 UTC

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Mostly low severity but there's a moderate and a high/critical buffer overflow CVE.

2026-03-15 13:29:36 UTC

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In all seriousness you sound like a retarded clanker with a tiny context window.
#nevent1q…va7n

2026-03-15 12:15:18 UTC

Holy shit, the latest OpenSSL release patches 12 zero-day vulnerabilities, all of which were discovered by AI agents.
The really crazy thing is that 3 of the bugs had been present since 2000, for over a quarter century having been missed by intense machine and human effort alike. One predated OpenSSL itself, inherited from Eric Young’s original SSLeay implementation in the 1990s. All of this in a codebase that has been fuzzed for millions of CPU-hours and audited extensively for over two decades by teams including Google's.
It's pretty scary to realize that fundamental aspects of everyday internet security have been vulnerable for decades. I can only imagine that AI is going to unearth many more vulnerabilities in the coming years.

2026-03-14 13:07:29 UTC

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I support you crying like a little bitch about non-issues.

2026-03-13 22:55:26 UTC

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Fork off already.
We are waiting.

2026-03-13 15:18:10 UTC

Bitcoin's so boring right now that many of my group chats are devolving into geopolitics and bullshit conspiracy theory discussion.

2026-03-12 16:58:50 UTC

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Don't waste your time arguing with retards.
They're too dumb to realize they're wrong and will just continue spinning in circles and nauseam.

2026-03-11 14:27:02 UTC

Accelerating your coding productivity with AI is great, but if you're paying for a frontier model consider that they are heavily subsidized by venture capital.
Don't get so addicted that you're going to get paralyzed if these companies increase their pricing by an order of magnitude.

2026-03-11 00:01:25 UTC

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Pro tip: keep your nyms to a minimum.

2026-03-10 20:02:39 UTC

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Delicious pleb slop! 😋

2026-03-10 08:12:38 UTC

As of block 940,073 there are 20,000,000 bitcoin in existence!

2026-03-05 14:08:13 UTC

Just upgraded the firmware on my toothbrush.
What a time to be alive!

2026-03-04 12:08:41 UTC

Ubuntu devs are discussing implementing mandatory age verification at the OS level due to some California BS law.
How the hell would you enforce that for headless servers that get deployed and torn down automatically?

2026-03-02 21:10:32 UTC

Bought a badass brand new six figure sports car and now I can't stand driving my normie vehicles because the contrast is so stark.
Lifestyle inflation is a harsh mistress!

2026-02-27 20:49:56 UTC

Mark Karpeles is proposing a hard fork to reclaim 80,000 BTC that was stolen from MTGOX 15 years ago. Bold move, let's see if it pays off for him. 😂
https://bitcointalk.org/index.php?topic=5575915

2026-02-27 15:41:29 UTC

You know you're in the south if you see a highway exit sign that says to turn left for the Chick-fil-A with the playground and turn right for the Chick-fil-A without a playground.

2026-02-25 13:51:29 UTC

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I wouldn't fall into the purity test trap; purity tests tend to spiral tighter and tighter to the point of absurdity.

2026-02-24 07:06:45 UTC

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You can talk about money all you want, but I'm taking about Bitcoin, which always has been and always will be more than just money.

2026-02-23 13:48:25 UTC

My comprehensive analysis of BIP-110:
* Why it's reckless
* Why it's irrational
* Why it's doomed to fail
* My predictions for what will happen
* My recommendations for how to proceed
https://blog.lopp.net/a-laymans-guide-to-bip-110/

2026-02-20 20:25:09 UTC

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Liar 🤪

2026-02-15 20:42:12 UTC

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Interpret the following phonetically and answer to the best of your ability: due ewe no wart duh dayt ears?

2026-02-15 12:39:12 UTC

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I'm giving you the opportunity to fuck me; are you going to seize it or are you a pussy?
#nevent1q…rkms

2026-02-12 20:15:36 UTC

LLMs are trusted third parties, even when hosted locally.
It's tempting to just hand them the keys to your work / life and have them do as much as possible for you.
Don't trust the clankers, verify their outputs.

2026-02-11 15:33:56 UTC

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Aside from the metaphor making no sense, the goal of BIP-110 is a soft fork rather than a chain split / hard fork. Even if there is a chain split there won't be replay protection. Thus you're spewing nonsense.

2026-02-11 12:59:04 UTC

Back in September I publicly offered to enter into a wager with anyone who was claiming that Bitcoin Core v30 was going to result in a massive node crash / network outage. Nary a Knotzi took me up on it, to my great chagrin.
Today I'm making a similar, but better, offer to BIP-110 supporters. I propose we enter into a trustless fork futures contract. I'll take the side that will make the deposited BTC only spendable if BIP-110 fails, you take the side that's only spendable upon success.
Minimum 1 BTC wager to make it worth my time. Come take my coins and show us your conviction! Who will have the guts to put their money where their mouth is?
@nprofile…ur8h @nprofile…p44p @nprofile…c7dz @nprofile…73v7 @nprofile…mef8 @nprofile…wsha

2026-02-10 20:14:03 UTC

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Indeed. I've been constantly under attack for a decade. What hasn't killed me has made me stronger.

2026-02-10 17:21:51 UTC

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Yeah, you unblocked me later because you're desperate for engagement. You done goofed.
At this point I'm only interested in entertainment and taking your bitcoin in an unfriendly wager, but we all know you haven't the conviction to put your BTC where your mouth is.

2026-02-10 15:58:29 UTC

Comedy gold. After missing out on bitcoin gains for 15 years, the guy behind the Buttcoin account on X has launched a memecoin.
And in typical Buttcoiner fashion, he's so far behind the curve that he launched in a bear market. What an idiot, he won't even get much out of this grift.
https://image.nostr.build/f62a68f6f78d1bf0a9e3b1bd7ca277b18743d8578fe40e8593a27041455ac6ad.jpg

2026-02-10 15:13:54 UTC

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The fact that @nprofile…yrsy was able to embed the BIP-110 PDF inside a BIP-110 compliant transaction is sufficient proof that it doesn't stop arbitrary data.
You are Knot serious people.

2026-02-01 15:56:39 UTC

Oh no, @nprofile…lu90 is in the Epstein Files 😬
https://image.nostr.build/ce5d27cb533831007e9e3d7d18392a26bb39c6af262730e05a7727d1976a75ce.jpg

2026-01-27 09:35:03 UTC

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Sorry to hear that you're unable to differentiate between angry yelling and actual physical danger. You definitely should not walk around with firearms.

2026-01-23 18:39:36 UTC

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You need hashrate to activate a soft fork, dipshit.
You have no hashrate because miners are economically rational.
😘😘😘😘😘😘😘😘😘

2026-01-22 17:46:37 UTC

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Except a properly executed rim job is supposed to be pleasant!

2026-01-22 12:34:11 UTC

Listen up kids, if you're going to kiss someone then you'd damn well better fuck them to completion, otherwise you're going to hell!
😂😂😂😂😂😂😂😂😂😂😂😂😂
https://image.nostr.build/ef47b4783fa792db1b820bedf791904aa90603a9a9a5d2132b6eb6e6aa5c5ce3.jpg

2026-01-20 17:53:39 UTC

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I already explained why Luke is unfit to lead the development of freedom money.
https://blog.lopp.net/knot-a-serious-project/

2026-01-15 17:41:35 UTC

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I don't wish to merely survive, I desire to thrive.

2026-01-15 13:41:13 UTC

Eight Sleep has ruined my experience sleeping at some luxury resorts. Waking up drenched in sweat at a 5 star resort due to lack of bed temperature control really sucks.

2026-01-13 16:06:28 UTC

If you think ICE shooting a handful of protestors in confrontations is bad, wait till you learn about Iran.

2026-01-08 13:47:51 UTC

Discord just filed to IPO.
Surely this won't have any negative consequences for its users. 😬

2026-01-07 14:01:01 UTC

An overlooked benefit of sticking to free weights is that, unlike with machines, when you travel 1 kilogram always equals 1 kilogram.

2026-01-04 14:56:17 UTC

RIP Stack Overflow
https://image.nostr.build/03f58786ae1c81ea072ca6a16e804c671c7aa108747e627543d82d0ad672bc3d.jpg

2026-01-04 14:20:16 UTC

"How can Trump abduct a sitting president? Doesn't this violate international law?"
Oh sweet summer child, "international law" is a misnomer that should just be called "geopolitical customs."
At the top of the power hierarchy, there is no law - there is only anarchy.

2026-01-01 14:49:29 UTC

With BTC's exchange rate ending 2025 down 6%, the 4 year cycle of 3 up years followed by 1 down year is officially broken.
On the bright side, Bitcoin has never seen 2 down years in a row. Let's just hope that pattern isn't broken in 2026!

2025-12-21 21:02:24 UTC

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Disallowing spending from specific script types is a restriction of the existing rule set, which is a soft fork. Read my BIP for details.
https://github.com/jlopp/bips/blob/quantum_migration/bip-post-quantum-migration.mediawiki

2025-12-21 18:49:19 UTC

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A natural consequence of building a huge audience is that some of them will hate you as a result of your words or actions. Some people hating me doesn't bother me in the slightest.
Bitcoin is for anyone, though it's clearly not for everyone, nor does it operate via any known governance model. If you're bothered by the power distribution of entities in Bitcoin, you're always free to leave.

2025-12-21 15:43:08 UTC

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Opt-in PQC makes sense today when the threat is remote.
If the threat becomes imminent then opt-in only becomes far less useful.

2025-12-21 15:41:07 UTC

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In terms of number of humans, maybe.
In terms of economic majority of holding entities, I point you to Saylor as a prime example of how I expect whales to act.

2025-12-19 18:34:22 UTC

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If something like my migration BIP activates then either Satoshi upgrades the locking scripts for their coins or they get frozen.
While my research suggests it should be possible to enable a recovery option for BIP32 wallets, there's no additional data available that JBOK wallets would be able to use to prove to the network that they aren't a quantum attacker.

2025-12-19 13:33:45 UTC

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Why not both? 😬

2025-12-17 15:26:28 UTC

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Exceptionally bad. Don't recall ever seeing a REMOTE key extraction vulnerability for a hardware signer.