Cypherpunk, PGP developer, first Bitcoin recipient
Even as my body is dying outside, I will remain alive inside.
Hal Finney wrote this in October 2009, two months after his ALS diagnosis. By then he had become the first known person besides Satoshi to run Bitcoin — at least, that is how he later told it. On January 11, 2009, a two-word tweet, “Running bitcoin”, was the first public trace of the software actually running. The next day Satoshi sent him 10 BTC in Block 170 — the first person-to-person Bitcoin transaction in history. Two months before that, during Satoshi’s pre-release code review, Finney had already been asking foundational scalability questions — how large the network might grow, whether it could ever handle close to the world’s financial transactions. For five more years he kept writing code as the paralysis advanced — in the end through eye-tracking software, at roughly one-fiftieth of his former speed, and still he wrote. He died on August 28, 2014. Alcor preserved him as their 128th patient.
That is why his name still comes up first among Satoshi candidates. The case fits almost too well — a veteran cypherpunk, his 2004 Reusable Proof-of-Work, his receipt of the first person-to-person Bitcoin transaction, and a home down the road from Dorian Nakamoto. Which is exactly why it deserves suspicion: two pieces of counter-evidence are hard to wave away — the April 18, 2009 race-day alibi and a Patoshi mining scale that does not match his activity. The full case is set out in the Hal Finney = Satoshi hypothesis; a 2026 documentary revived it in a different form, pairing Finney with fellow cypherpunk Len Sassaman as Bitcoin’s co-creators.
Harold Thomas Finney II was born on May 4, 1956, in Coalinga, California, and grew up in Arcadia, California. He graduated as valedictorian from Arcadia High School in 1974 and earned a Bachelor of Science in Engineering from the California Institute of Technology (Caltech) in 1979.
Finney’s working life began the way it would end — giving the code away. In 1991 he volunteered for Phil Zimmermann’s Pretty Good Privacy (PGP), writing it for free, and became one of PGP 2.0’s principal developers. When Zimmermann incorporated PGP Inc. in 1996, Finney was among the first hired; the company later became part of Symantec.
In November 1992, Timothy May asked on the Cypherpunks list why Finney’s work on a fully encrypted remailer had drawn no discussion at all. Finney answered that PGP had led him to David Chaum’s papers, which held the technologies to make Vernor Vinge’s True Names work, and called the remailers the “ground floor” of a house of ideas aimed at making Big Brother obsolete. In July 1995 he challenged the list to break a recorded Netscape order session encrypted with SSL’s exportable 40-bit RC4. Damien Doligez broke it in August, and a second challenge Finney posted that month fell in under 32 hours to machines pooled over the Internet.
The decrypted order shipped to “1234 Squeamish Ossifrage Road,” the words of the best-known earlier attack of the same kind. In April 1994, after eight months of work by about 600 volunteers in 24 countries, the factoring of RSA-129 had decoded the message Martin Gardner’s column published in 1977, “The magic words are squeamish ossifrage.” Brian Hayes, reporting it in American Scientist, drew the lesson that the security of RSA “depends more on ignorance than on knowledge.”
Long before ALS gave that opening line its weight, Finney already believed the body’s limits could be outlasted. He had been drawn to cryonics since his freshman year at Caltech, and was an active voice in the Extropy Institute’s debates on life extension, space colonization, nanotechnology, and artificial intelligence. On October 15, 1992, he and his wife Fran signed their Alcor cryonics membership in Riverside, California, and held it for the more than two decades until Alcor received him.
In 2004 he built Reusable Proof-of-Work (RPOW), and gave that away too. It took Adam Back’s Hashcash — a proof-of-work token good for a single use — and made it reusable: work that could be spent, returned, and handed on. And it ran: where Wei Dai’s b-money and Nick Szabo’s Bit Gold stayed proposals, RPOW was a working system.
Where RPOW stands next to Hashcash, b-money, and Bit Gold — and where Satoshi stood relative to all three — is the subject of a separate reading of the cypherpunk core. RPOW first appears in Satoshi’s own writing in a July 2009 email, after Bitcoin’s launch. For when Satoshi learned of it, relative to the other precursors, see the account of what Satoshi knew before the code was done.
He was there from the start. When Bitcoin v0.1 was announced on January 8, 2009, Finney “grabbed it right away,” as he later put it, and ran a node, the first known besides Satoshi Nakamoto himself, and began mining around Block 70, which the chain reached late on January 10 (UTC). The “Running bitcoin” tweet came on the 11th, and 10 BTC from Satoshi in Block 170 on the 12th. Later that month, a technical observation Finney posted to the cryptography mailing list — that valuable proof-of-work tokens would make botnet infections more noticeable — became the launching point for Satoshi’s “reverse-spamming” reply to another early user.
In August 2009 came the diagnosis: amyotrophic lateral sclerosis (ALS). Seventeen days later he tweeted that he had just got back from an 11-mile run and treasured each one now. He retired from PGP Corporation (Symantec) in early 2011 — and did not stop working. On March 19, 2013, he published “Bitcoin and Me” on BitcoinTalk — life after the diagnosis: paralyzed, fed through a tube, working the computer through an eye-tracker, and still programming:
I recently discovered that I can even write code. It’s very slow, probably 50 times slower than I was before. But I still love programming and it gives me goals.
His final year brought an ordeal of a different kind. An extortionist demanded 1,000 BTC — about $400,000 at the time — and, when no payment came, spoofed the Finney home number to tell the Santa Barbara police that someone had been killed at the house. A SWAT team responded. Finney, by then immobilized by ALS, was made to wait outside for half an hour while officers cleared the home.
Hal Finney died on August 28, 2014, at 8:50 AM in Scottsdale, Arizona. Alcor Life Extension Foundation cryopreserved him as their 128th patient (member A-1436). He is survived by his wife Fran — her own biography and a 2019 Cryonics Magazine profile collect their life together in full — son Jason, and daughter Erin.
98 entries / 9 threads
By 2008 Microsoft's free compiler wanted a Passport sign-in. Satoshi used the 1998 Visual C++ 6.0 and free MinGW, signed up for services under his pseudonym, and designed a system without accounts.
Satoshi's code had a COIN and a CENT and nothing smaller with a name. Bitcoin's smallest unit, the satoshi, was named by users on BitcoinTalk two months after his last post.
Hal Finney likes Gavin's full-precision plan, ribuck's bitcent terminology, and Mike Hearn's idea of letting miners store fee policy in blocks.
Hal Finney points the new thread back to ribuck's bitcent, millicent and microcent, noting that the microcent is exactly the smallest unit.
Context post by Hal in BitcoinTalk topic 2188. before msg29259.
John Gilmore objects that proof-of-work money would burn every idle cycle, consuming electricity and generating carbon dioxide all over the Internet, and asks why bank money can't simply be converted.
May asks why random number generators draw dozens of Cypherpunks posts while Hal Finney's work on a fully encrypted remailer has drawn none: anonymous remailing is where cypherpunks need to be.
Answering May, Finney tells how PGP led him to Chaum's papers, which held the technologies to make Vinge's True Names work, and calls remailers the ground floor of making Big Brother obsolete.
Hal Finney posts a recorded Netscape order session encrypted with SSL's exportable 40-bit RC4 and challenges the list to break it and recover the fake name and address he entered.
Replying to Hal's 2009 tweet, Fran Finney writes that he posted it 17 days after his ALS diagnosis, and that a half marathon on September 6, 2009, was his last real run.
Seventeen days after his ALS diagnosis, Hal Finney tweets that he has just got back from an 11-mile run and treasures each one now.
Back lists the shrinking versions of his RSA-in-Perl program, smallest first, back to the five-line original of March 9, 1995, which Hal Finney explained on the Cypherpunks list soon after.
Doligez on breaking Hal Finney's 1995 SSL challenge: second to find the key, about two hours after David Byers and Eric Young working with Adam Back; the second challenge fell in under 32 hours.
Two months after his ALS diagnosis, Finney writes that over 90% of ALS patients choose to die rather than go on a ventilator, and that when the time comes he hopes to choose life.
On August 20, 2008 Satoshi called his C++ code nearly finished. Which precursors were in front of him by then? The earliest record for Hashcash, b-money, MicroMint, Bit Gold, DigiCash and RPOW.
Hal Finney invites the list to try rpow.net: a server that takes hashcash and issues reusable RSA-signed tokens, running on an IBM 4758 card whose signed attestation lets anyone check the code.
Finney's RPOW FAQ: how RPOW differs from hashcash and ecash, why the central server is a crucial element rather than a bottleneck, and why the IBM 4758 was the only possible platform.
Finney's rpow.net home page: RPOW lets hashcash tokens be reused in sequence, runs on an IBM 4758 whose attestation lets anyone verify the code, and could serve as a form of Nick Szabo's bit gold.
Hal Finney calls May's BlackNet "a good essay" but names what it leaves out, military intelligence: with anonymity and digital cash, selling secrets would no longer need a risky meeting.
How a 1992 Oakland meeting became the Cypherpunks mailing list: the name, the remailers, the Clipper fight, the 1997 split, and the Hashcash and b-money posts the Bitcoin whitepaper later cited.
American Bitcoin infrastructure engineer. Built Statoshi node telemetry (2014), was SWATted at his home in 2017, joined Casa (2018), and wrote "Who Controls Bitcoin Core?" (2018).
Hal Finney's full BitcoinTalk post recounting his early involvement with Bitcoin, his correspondence with Satoshi, and his ALS diagnosis.
Ray Dillinger on his November 2008 review of Bitcoin's block chain code with Hal Finney, why its lack of any Trusted role convinced him Satoshi wasn't scamming, and the ICO scams that followed.
Ray Dillinger's full 2018 interview for the Bitcoin whitepaper's 10th anniversary: his 2008 code review, the floating-point discovery, and his views on deflation and mining centralization.
A curated way in: questions about Satoshi Nakamoto and Bitcoin history, each pointing to the page that answers it in full.
James Donald tied the issue he pressed Satoshi on to the 1982 Byzantine Generals Problem. Satoshi said Bitcoin solved it in a network anyone could join, and explained it with a king's wi-fi password.
Doubters called it unscalable in 2008. A famed hacker failed to break the code. A judge, a dictionary, and a Nobel nominator weighed in. What others said about Satoshi, read as one record.
Eight pages posted to a mailing list on October 31, 2008 — a report on a working system that had been 18 months in the making. It met silence first, then doubts about scale.
His legal name was, literally, Satoshi Nakamoto — and a 2014 Newsweek cover story named him. The evidence, weighed.
When correspondents wished Satoshi merry Christmas, predicted $10M per coin, or hoped he was well, his replies went straight to the technical point and ignored the rest. Five patterns, examined.
Hayek's 1976 case for competing currencies, the Extropians' imaginary 'Hayeks' currency of 1995, and Bitcoin, money no state issues: one line of thought, linked by ideas rather than proven influence.
Finding Satoshi (Tooley / Miele, April 2026) names Hal Finney and Len Sassaman as Bitcoin co-creators: Finney coded, Sassaman wrote the paper. Lopp and Back dispute it.
Hal Finney's tweet, the first known reference to running Bitcoin from a machine other than Satoshi's, posted two days after Bitcoin v0.1 was released.
Satoshi coded Bitcoin on Windows for 27 months, mainly with MinGW. In November 2009 he finished the Linux build Martti Malmi had started; by mid-2010 there were Windows, Linux and Mac releases.
Satoshi grants Malmi developer access on SourceForge, agrees on a password-protected wallet feature, and shares a long Q&A dump of frequently-asked Bitcoin questions for the planned FAQ.
Hal Finney to Satoshi during pre-release code review, asking how large the P2P node network might grow — tens to millions — and whether clients could scale to all world financial transactions.
Hal Finney asks for multiple block generators behind one NAT, suggests secure timestamping fits Bitcoin's chain, and requests a client-side library interface for scripting languages.
March 25, 2014 Forbes feature: Andy Greenberg followed the Temple City coincidence to Hal Finney, then dropped the theory after seeing Finney's 2009 emails with Satoshi and his wallet record.
He built RPOW, received the first Bitcoin transaction, and lived blocks from Dorian Satoshi Nakamoto. The evidence for Hal Finney as Satoshi, weighed.
A reanalysis of van Dorst's stylometric corpus for the five most-cited candidates. Szabo led them, in the top 4.67% of 12,739 authors, but 594 unnamed authors came closer.
On February 22, 2021, Evan Hatch published Len Sassaman and Satoshi: a Cypherpunk history on Medium — the article that became the foundational case for the Sassaman = Satoshi Nakamoto hypothesis.
On May 15, 2015, the New York Times published Nathaniel Popper's Decoding the Enigma of Satoshi Nakamoto — a Digital Gold excerpt naming Bit Gold designer Nick Szabo as Satoshi. Szabo denied it.
He conceived Bit Gold, and three of the four most-cited stylometric studies place him first. The evidence for Nick Szabo as Satoshi, weighed.
On April 8, 2026, the New York Times published John Carreyrou's investigation naming Adam Back as the most likely Satoshi based on stylometric analysis. Back denied the identification.
Satoshi has been hunted in public for years and left a large trail of material, yet remains unidentified. Why all that searching and all that material have not led to a name.
Twelve recurring Satoshi candidates, compared across four independent layers: profile match, stylometric attribution, direct correspondence and development environment.
The Mixmaster developer who died 68 days after Satoshi's last known email. The evidence for Len Sassaman as Satoshi, weighed.
Jameson Lopp argues Hal Finney could not have been Satoshi: on April 18, 2009, Finney was running a 10-mile race in Santa Barbara during a window of Satoshi network activity.
Three primary-source clues to Satoshi's place among the cypherpunks: he had not heard of b-money, Wei Dai called him "not previously active," and what Satoshi did tracked Hughes's 1993 manifesto.
Satoshi's working environment during the Bitcoin v0.1 launch week (Jan 8-12, 2009): "from where I am" in the Jan 12 email to Finney, and how much he packed into that week.
Thread starter by Hal in BitcoinTalk topic 2077.
Quoted post by Hal in BitcoinTalk topic 1735.
Context post by Hal in BitcoinTalk topic 1790. quoted by msg28959.
Benjamin Wallace's Wired feature — an early major mainstream article on Bitcoin. Traces the whitepaper, mining boom, Mt. Gox hack, and growing pains, ending with Garzik's "We really don't care."
Hal Finney's private email to Satoshi during pre-release code review, asking foundational scalability questions: 'How large do you envision it becoming? Tens of nodes? Thousands? Millions?'
Satoshi personally notifies Hal Finney of the Bitcoin v0.1 release hours after the public Cryptography list post, sending the SourceForge link and pointing him to bitcoin.org for release notes.
Satoshi's final email to Adam Back thanks Back for his reading suggestions and announces the software launch. The page also includes Hal Finney's project overview from the Cryptography mailing list.
Satoshi tells Finney that he cannot receive incoming connections from his location, revealing an operational constraint in the earliest days of the Bitcoin network.
Security consultant at Periwinkle who joined the cryptography list discussion of Bitcoin in January 2009, ironically observing that botnet-controlled machines are among the most secure on the network.
Fran Finney: wife of Hal Finney (the first known person other than Satoshi to run Bitcoin). She witnessed Bitcoin's earliest moments, cared for Hal through ALS, and became the keeper of his legacy.
Hal Finney congratulates Satoshi on the first alpha and his famous thought experiment: if Bitcoin becomes the dominant payment system, each coin would be ~$10M — early mining a 100M-to-1 payoff bet.
CoinDesk published previously unseen Satoshi-Finney emails (obtained via widow Fran Finney): Finney's November 2008 scalability question and Satoshi's personal v0.1 release notice on January 8, 2009.
SerHack analyzed a pre-release Bitcoin genesis block dated September 10, 2008 — found in source code Satoshi shared in November 2008. The date matched Lehman's $3.9B loss report.
The first person-to-person Bitcoin transaction in history. Satoshi Nakamoto sent 10 BTC to Hal Finney in Block 170, confirming that Bitcoin's peer-to-peer electronic cash system worked as designed.
Cryonics Magazine's profile of Hal Finney, based on interviews with his wife Fran — Caltech, his PGP Corporation career, his excitement over Bitcoin, his ALS diagnosis and his Alcor cryopreservation.
The first known tweet about Bitcoin. Hal Finney posted 'Running bitcoin' two days after Bitcoin v0.1 was released, on January 10/11, 2009. He was the first known person other than Satoshi to run it.
Two months after his ALS diagnosis, Hal Finney wrote on LessWrong that over 90% of patients choose death over a ventilator, and that he hoped to choose life and still write code.
Nick Szabo's May 2011 blog post on why digital cash took eleven years to get from bit gold (1998) to Bitcoin (2009). It names libtech as the private list where bit gold and b-money grew in parallel.
Ray Dillinger's retrospective on his role in Bitcoin's earliest days: reviewing the blockchain code, his division of labor with Hal Finney, and his reflections on Satoshi's integrity.
Tim Swanson's comprehensive interview with Ray Dillinger for the Bitcoin whitepaper's 10th anniversary. Dillinger reveals technical details of his code review, including the floating-point discovery.
Hal Finney's RPOW system, a 2004 prototype for reusable proof-of-work tokens, gains posthumous recognition as one of Bitcoin's most important precursors.
Hal Finney, the first known person besides Satoshi to run Bitcoin and the recipient of the first Bitcoin transaction, passes away from ALS at the age of 58.
Hal Finney's famous retrospective on his early involvement with Bitcoin, his interactions with Satoshi, and his battle with ALS. One of the most celebrated posts in Bitcoin history.
Hal Finney calls Bitcoin a very promising idea and links it to Szabo's bit gold, then asks what the paper leaves unspecified: node checks, double spends, and the attacker.