Satoshi and Hal Finney were not the same person.
Treating them as one misunderstands the ethos of Satoshi and erases a brilliant cryptographer.
Why I think the Distinction Matters 🧵
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Every cycle, money follows credentials:
2017: Applied Cryptographer
2021: Economist
Now: "ex-citadel, jane street math olympiad"
But to definitively call Satoshi a cryptographer is to misunderstand how Bitcoin started and what Satoshi did.
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Satoshi was a hacker in the old sense.
He spent ~18 months combining a Hashcash-style proof-of-work, digital signatures, and a timestamp chain until the client ran
The mechanism was the result of hours of trial and error, solving problems one by one, not sitting at a whiteboard drawing diagrams.
Satoshi himself said:
“I had to write all the code before I could convince myself that I could solve every problem, then I wrote the paper.”
He learned as he went and made mistakes.
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Hal was different.
He was a brilliant career applied cryptographer.
Hal lead work on PGP.
He staunchly defended civil liberties around right to privacy and right to cryptography in the US.
He ran privacy preserving remailers and bitcoin nodes despite the risks (especially considering the scrutiny his colleagues were under for their work on PGP)
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When Hal set out to build his own implementation of digital cash in 2004
He went about it like the brilliant cryptographer he was.
Hal spent 10 years writing essays and sharing thoughts on every element of crypto: digital cash, privy, remailers etc.
Then he built RPOW
github.com/NakamotoInstitute…
For Hals the cryptography is the focus. Can you build a system where you don't have to trust the operator?
nakamotoinstitute.org/finney…
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RPOW was a breakthrough.
It was a real system where you could send/receive tokens without trusting Hal at all.
But it was more TEE than blockchain.
The threat model was cryptographic so if the server was shut off the network stopped
There was no economic model and no sense the network would be used in a different way then how PGP was used: as open source software to implement in other projects
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Bitcoin needed both.
It relied on the work of @adam3us , Massias, Merkle and tons of other brilliant cryptographers and mathematicians who in turn stood on the shoulders of others
Satoshi shipped a client.
Hal was the first person to see Bitcoin's potential value.
He tested the software and was one of the few on the mailing list to see Bitcoin's potential, ask questions and explain how pieces might work responding enthusiastically rather than cynically as he put it
Aug 28, 2026 · 1:05 PM UTC
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So why do I think Satoshi was a polymath hacker and not a cyptographer/Hal Finney?
The evidence:
@gavinandresen has pointed out that if Satoshi had been Hal Finney he'd have been familiar with these concepts from his work/mailing list interactions
satoshi.nakamotoinstitute.or…
There's more here including the way he talks about ECDSA, in particular selecting secp256k1 purportedly saying
"There is no particular reason why secp256k1 is used. It just happened to be around at the time"
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Then there's the code itself.
The early bitcoin code is brilliant but very hacked together.
For example, there's still some code in there for a poker server github.com/0xMagnuz/Bitcoin-… and a market place
Very different from the way Hal went about implementing PoW stylistically:
github.com/NakamotoInstitute…
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It's also pretty unlikely someone with opsec good enough to remain anonymous for 12 years as the worlds most famous person would regularly correspond with his IRL self on a public forum.
Lastly, Hal has said he's not Satoshi
bitcointalk.org/index.php?to…
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There's a lot more here.
Whole books have been written on Satoshi's identity & legacy and my thoughts aren't original.
Hal was an incredibly important part of the bitcoin story and a brilliant cryptographer
He worked with Satoshi to fix bugs, suggest improvements and received the first ever BTC
He was a great man and his epithet was fitting. His last public line was:
"I'm comfortable with my legacy."
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Maybe I'm wrong
Maybe I've got an idealized version of Satoshi in my head that is more a reflection of my values than anything he said
Lots of parties have had a vested interested in interpreting Satoshi's writings in different ways for their own reasons
But the old adage "don't meet your heroes" exists for a reason
Nothing can inspire you more than your own imagination
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I don't think we should let Satoshi's legacy outshine Hal's today.
Whether or not he was Satoshi Hal was a great man too
He fought for privacy, built cryptographic protocols, wrote essays about novel ideas and engaged with Satoshi's ideas when other wouldn't.
That's a pretty great legacy and if he's comfortable with it we should be too.
Rest in Peace Hal.
You're truly missed.
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