cypherpunk

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.

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.

Hashcash's inventor and the first person Satoshi contacted. In April 2026 the NYT named him the closest stylometric match among 620 cryptography-mailing-list writers. The evidence, weighed.

Adam Back's answer to a NYT investigation naming him as a leading stylometric match to Satoshi: "i'm not satoshi," followed by his account of his cypherpunk interest in ecash from about 1992.

In an April 2025 interview, P2P Foundation founder Michel Bauwens recalled receiving several emails from Satoshi (who offered him a few bitcoins) and gave a retrospective on Bitcoin's significance.

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.

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.

Timothy May, an Intel physicist who retired at 35, wrote The Crypto Anarchist Manifesto in 1988, co-founded the Cypherpunks in 1992, and stayed a skeptic of crypto hype until his death in 2018.

Harold Thomas Finney II (1956–2014): Caltech engineer, PGP 2.0 developer, Extropian, cryonics advocate, RPOW creator, first Bitcoin recipient and first known person other than Satoshi to run Bitcoin.

He built RPOW, received the first Bitcoin transaction, and lived blocks from Dorian Satoshi Nakamoto. The evidence for Hal Finney as Satoshi, weighed.

Wei Dai's March 2014 LessWrong Q&A: why he never built b-money, his disillusionment with crypto-anarchy, and his reading of Satoshi's motives and background.

He conceived Bit Gold, and three of the four most-cited stylometric studies place him first. The evidence for Nick Szabo as Satoshi, weighed.

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.

After Len Sassaman's death (July 3, 2011), security researcher Dan Kaminsky embedded an ASCII-art tribute into the Bitcoin blockchain, announced July 30 and revealed at Black Hat USA 2011.

American cryptographer (1980-2011), Mixmaster lead developer, KU Leuven PhD candidate. Died by suicide 68 days after Satoshi's last message. Later named in a Satoshi-identity hypothesis.

The Mixmaster developer who died 68 days after Satoshi's last known email. The evidence for Len Sassaman as Satoshi, weighed.

German cryobiologist, transhumanist, and cypherpunk who joined the bitcoin-list discussion in October 2009, replying to Satoshi's post about Bitcoin stability and asking about Debian packages.

Computer scientist (handle bear / cryddit) who, with Hal Finney, reviewed Satoshi's source code before public release. Focused on security auditing; credited with input on the 1 MB block size limit.

Cryptographer and libertarian commentator who was the first to publicly respond to Satoshi on the cryptography list (November 2, 2008). His scalability skepticism prompted key design clarifications.

The first person to answer the Bitcoin whitepaper, James Donald was also the only other person known to use a rare word of Satoshi's, making him Benjamin Wallace's top lead. The evidence, weighed.

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.

Bitcoin v0.1 reuses one cypherpunk primitive (PoW from Hashcash), borrows general CS components (Merkle trees, linked timestamping, ECDSA), and synthesizes the rest (UTXO, mining, 21M cap, P2P).

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.

Twelve recurring Satoshi candidates, compared across four independent layers: profile match, stylometric attribution, direct correspondence and development environment.

Computer scientist and cryptographer who created b-money (1998), one of the earliest digital currency proposals, and the Crypto++ library. Satoshi emailed him before publishing the Bitcoin paper.

Wei Dai's b-money is whitepaper reference [1], his Crypto++ shipped inside Bitcoin v0.1, and he was the second person Satoshi contacted. The evidence for Wei Dai as Satoshi, weighed.

Satoshi thanks Adam Back for the b-money reference and reveals he was not previously aware of Wei Dai's proposal. Historically significant line: 'my ideas start from exactly that point.'

Adam Back confirms the Hashcash citation and suggests Satoshi look at Wei Dai's b-money proposal. This referral led Satoshi to contact Wei Dai and cite b-money in the Bitcoin whitepaper.

Satoshi Nakamoto's earliest known email. He contacts Adam Back to verify the Hashcash paper citation and shares a pre-release draft titled 'Electronic Cash Without a Trusted Third Party' (ecash.pdf).

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.

British cryptographer and cypherpunk (born 1970) who invented Hashcash (1997). The first known person Satoshi contacted about Bitcoin (August 20, 2008). Co-founded Blockstream in 2014.

On his Unenumerated blog, Nick Szabo asks for help implementing bit gold, his 1998 design. No one responds. Six and a half months later, Satoshi publishes a whitepaper that never mentions bit gold.

Computer scientist, legal scholar, and cryptographer (1964-) who conceived Bit Gold (1998) and coined the term smart contracts.

Asked how to stop a present event being passed off as a past one, Assange answers that you need a trusted time-notary who publishes hashes somewhere hard to undo, such as a newspaper.

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.

Back's page for his RSA program in Perl, small enough for an e-mail signature, which a U.S. Commerce Department statement ruled must not be exported, and which went onto T-shirts and tattoos.

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.

Wei Dai replies to Adam Back on Cypherpunks, conceding b-money would be at most a niche mechanism and revealing his shift toward viewing the government monopoly of force as a net benefit.

Adam Back replies to Wei Dai on Cypherpunks, identifying seven monetary-design issues in b-money and proposing Hashcash as the minting mechanism — a substantive analysis ten years before Bitcoin.

Wei Dai announces b-money on the Cypherpunks list as a brief addendum to PipeNet 1.1, pointing readers to his eskimo.com page — the proposal later cited as reference [1] in the Bitcoin whitepaper.

Wei Dai announces b-money on the Cypherpunks list as a secondary item alongside PipeNet 1.1, his primary focus. The proposal later cited in Bitcoin appears in a single sentence at the end of the post.

Adam Back announces Hashcash to the Cypherpunks list — a proof-of-work postage scheme against spam, pitched as a stopgap until digicash spread or a fallback if it failed.

Jim Choate rejects a central majordomo: he envisions a fishnet of remailers where each node links to two others. "There should be no 'one main' anything on this project."

Adam Back proposes one main majordomo feeding many mail exploders, an architecture he credits John Gilmore with suggesting as the simpler alternative.

Jim Choate reports the first link between cypherpunks@ssz.com and cypherpunks@algebra.com and hopes a three-way link will be ready for prime time.

Lance Cottrell, author of Mixmaster, opens cypherpunks@cyberpass.net and says he favors a multi-node list, where no one site can censor it and losing any one node is not catastrophic.

Adam Back welcomes Sten Drescher's plan for a network of majordomos to carry a new Cypherpunks list and suggests mail exploders behind a central majordomo as a simpler design.

John Gilmore says he will no longer host the Cypherpunks list: unless the community builds a new home by February 20, the list will cease to exist.

Timothy May explains why he left the Cypherpunks list when moderation began: John Gilmore may run his machine as he wishes, but no host owns the group, and censorship makes the list worse.

John Gilmore announces that Sandy Sandfort will moderate the Cypherpunks list for a one-month test, with unedited and flames lists for those who want everything.

Until December 30, 1996, U.S. rules listed encryption software with weapons. Zimmermann was investigated, Karn sued over a floppy disk, Bernstein won in court, and Back put RSA on a T-shirt.

Jim Byrd forwards Johan Helsingius's press release closing anon.penet.fi, a remailer with over half a million users, because Finnish law on the privacy of Internet messages was still unclear.

Rich Burroughs forwards a signed Usenet report: on August 22, 1996, a Helsinki court ordered Johan Helsingius to reveal the address the police wanted within 30 days or face fines and jail.

Wei Dai announces Disperse/Collect 1.0 on the Cypherpunks list and says he built it with his own Crypto++ library, a sign that he wrote code himself.

Henson tells the Cypherpunks list over 500 munitions T-shirts have shipped, 25% of U.S. profits go to Phil Zimmermann's legal defense fund, and buyers arrested for wearing one get a refund.

Don Henson reports over 350 RSA/Perl munitions T-shirts shipped by July 27, 1995: under ITAR, wearing one where a non-U.S./Canadian citizen can see it counts as exporting cryptography.

May dates his thinking on crypto and the state to late 1987, when public-key crypto, anonymous digital cash and information markets struck him as the end of governments as we know them.

May recalls how Jude Milhon's quip at the earliest meetings, "You guys are just a bunch of cypherpunks," became the group's name, and why the link to cyberpunk fiction felt natural.

May explains the list's slogan "Cypherpunks write code" as a clarifying statement rather than an imperative, and estimates how few members actually wrote code.

May notes that he devised the "Big Brother Inside" slogan against the Clipper chip himself, at a Clipper meeting.

May tells newcomers that the list has no debate about the Clipper chip because it was thoroughly trashed within hours and days of its April 16, 1993 announcement.

May's outline of the group's start: talks with Eric Hughes, a first meeting in the week PGP 2.0 came out, the afternoon "Crypto Game," and John Gilmore's offer of a list site and office space.

May recalls three days of talk with Eric Hughes in May 1992 about how slowly academic cryptography became working code, and the aim to get actual running code for digital cash and mixes.

May explains the group's attachment to PGP: its first meeting in September 1992 fell within days of PGP 2.0's release, and PGP was a practical tool hobbyists could actually use.

May notes that PGP 2.0 arrived the same week as the Cypherpunks' first meeting in Oakland in September 1992, and just six months before the Clipper announcement.

Mike Duvos asks whether anyone has obtained DigiCash's software: it is for sale on Chaum's web page but apparently only for electronic money. "A classic chicken and egg situation. :)"

Timothy May reads the Clipper Chip as the "cc" chip: an automatic carbon copy for Big Brother. He bets the "Wiretap Chip" will be used for more than voice.

Paul Ferguson reviews Levy's "Crypto Rebels" in Wired's May/June 1993 issue, bought off a newsstand; the cover shows May, Hughes, and Gilmore in white plastic masks behind a flag.

Eric Hughes answers the Clipper chip announcement the same evening in four lines: he will say much more in the coming weeks, but for now only one thing. "No compromises."

Timothy May forwards the White House announcement of the Clipper chip and its key-escrow system: "it's not a spoof...I can't check the White House's signature!"

Eric Hughes posts A Cypherpunk's Manifesto, dated March 9, 1993, to the list: privacy is the power to selectively reveal oneself, and "Cypherpunks write code."

Eric Hughes, a mathematician, co-founded the Cypherpunks in 1992, ran their mailing list, built early anonymous remailers, and wrote A Cypherpunk's Manifesto on March 9, 1993.

Timothy May posts the Crypto Anarchist Manifesto to the Cypherpunks list: written in 1988 and read at the group's September 1992 founding meeting, it predicts anonymous markets beyond state control.

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.

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.

Eric Hughes posts the Perl script for a hopping remailer he wrote that morning, tests it with three hops, and names the next project: encrypting each message so the route stays hidden.

A tongue-in-cheek notice signed "Mr. Crypto": mail sent to hughes@soda.berkeley.edu with a Request-Remailing-To header is stripped of its headers and resent, though rumor says he saves everything.

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.

Cryptographer who invented blind signatures at CRYPTO '82 and founded DigiCash in 1990 to build eCash, an anonymous digital currency two decades before Bitcoin. DigiCash went bankrupt in 1998.

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.