A major new investigation done for The New York Times has identified Adam Back, a 55-year-old British cryptographer and CEO of Blockstream, as the strongest candidate to be Satoshi Nakamoto, the pseudonymous creator of Bitcoin.
The 12,000-word report was written by investigative journalist John Carreyrou, known for exposing the Theranos fraud. Back has denied the claim repeatedly, both in the article and on social media.
The case rests primarily on linguistic analysis. Carreyrou worked with AI specialist Dylan Freedman to compile archives from three cryptography mailing lists spanning 1992 to October 2008, the period when Satoshi was active in these forums. They compared the writing patterns of roughly 34,000 contributors against all of Satoshi’s known public writings, including the Bitcoin white paper, forum posts and emails.
The analysis focused on specific quirks: double spaces between sentences, inconsistent hyphenation, confusion between “its” and “it’s,” alternating between British and American spellings, and placing “also” at the end of sentences. After applying each filter sequentially, the pool of suspects narrowed from 34,000 to eight. Then to one, the most likely being, Adam Back.
Computational linguist Florian Cafiero, who had previously attempted and failed to identify Satoshi using stylometry, found Back to be the closest match to Satoshi’s writing among 12 suspects, though the results were formally inconclusive. Separately, the investigation identified 67 shared hyphenation errors between Back and Satoshi, nearly double the next closest suspect. Forensic linguist Robert Leonard of Hofstra University described such idiosyncrasies as “markers of sociolinguistic variation,” effectively linguistic fingerprints.
Beyond writing patterns, the circumstantial evidence runs deep. Back invented Hashcash in the late 1990s, the proof-of-work system that Satoshi cited in the Bitcoin white paper and used as the foundation for Bitcoin mining.
Back’s posts on the Cypherpunks mailing list from 1997 to 1999 discussed concepts that closely mirror Bitcoin’s core mechanics, including solutions to the Byzantine Generals Problem and timestamping transactions to prevent double spending. Back went largely silent on the Cryptography mailing list during the exact period Satoshi was active, from 2008 to 2011, and became vocal about Bitcoin roughly six weeks after Satoshi disappeared in April 2011.
The investigation also examines emails between Back and Satoshi from August 2008, produced during the Craig Wright fraud trial in London. In those exchanges, Satoshi appeared to contact Back before the white paper’s release to confirm a citation of Hashcash. Carreyrou raises the possibility that Back sent those emails to himself as a cover story, though he offers no direct evidence for this claim. Back has refused to provide metadata for those emails.
During an interview in El Salvador in January 2026, Back denied being Satoshi more than six times over two hours. Carreyrou noted what he described as suspicious body language during pointed questions. He said his initial suspicion ignited as he was watching Back’s appearance in the 2024 HBO documentary Money Electric: The Bitcoin Mystery, which had pointed to a different suspect, Canadian developer Peter Todd.
Back responded on X after the article was published:
“I’m not satoshi, but I was early in laser focus on the positive societal implications of cryptography, online privacy and electronic cash.”
He also added:
I also don’t know who satoshi is, and i think it is good for bitcoin that this is the case, as it helps bitcoin be viewed a new asset class, the mathematically scarce digital commodity.
— Adam Back (@adam3us) April 8, 2026
He described the linguistic overlap as “a combination of coincidence and similar phrases from people with similar experience and interests.” Blockstream released a statement calling the investigation “built on circumstantial interpretation of select details and speculation, not definitive cryptographic proof.”
The crypto community has pushed back broadly. Bitcoin contributor Jameson Lopp wrote: “Satoshi Nakamoto can’t be caught with stylometric analysis.” Galaxy Digital researcher Alex Thorn called it “another journo oneshotted by the Satoshi mystery.”
Early Bitcoin participant Nicholas Gregory warned that publicly identifying Satoshi, even incorrectly, puts the person and their family at physical risk. Gregory added that if Back were Satoshi, “we would have to respect the extraordinary lengths he has gone to in order to ensure no one thinks it’s him.”
Critics also noted that the investigation gave minimal treatment to Nick Szabo, a reclusive polymath whose initials are the inverse of Satoshi Nakamoto and who has been a prominent suspect for years. Peter Todd, the 2024 documentary’s pick, was 23 when he published the white paper and provided photographic alibis for key dates. Hal Finney and Len Sassaman, two other long-standing suspects, are both deceased, which conflicts with Satoshi’s known online reappearance in 2015.
Observers believe Satoshi Nakamoto holds approximately 1.1 million Bitcoin, currently worth around $71 billion, which would place the anonymous creator among the 26 richest people in the world. Whether anyone, including Back, is ever definitively identified as Satoshi remains an open question.
As Back himself wrote on X:
“I think it is good for bitcoin that this is the case, as it helps bitcoin be viewed a new asset class, the mathematically scarce digital commodity.”
The mystery, after 17 years, continues.