Satoshi Nakamoto, the pseudonym of the mysterious creator of Bitcoin, may have been unmasked. The person in question is allegedly British cryptographer Adam Back, 55, a historical figure in the Bitcoin universe. This is the conclusion suggested by an investigation conducted by John Carreyrou of The New York Times. 

John Carreyrou explains that he spent nearly two years scouring archives of cypherpunk mailing lists (1992-2008) and other technical texts. He claims that by cross-referencing computational linguistic analysis (double spaces after periods, British/US spelling variations, the absence of a hyphen in "proof-of-work," or "its/it's" usage, etc.) with biographical and chronological coincidences, Back emerges as the only suspect who checks every box. He claims to have narrowed his list from 34,000 users down to... Adam Back himself - notably with the assistance of AI.

For instance, stylometric analyses reportedly indicate that Satoshi and Back share writing "fingerprints" that no other contributor to the cypherpunk lists possesses simultaneously. He also notes that Adam Back invented Hashcash in 1997 - the proof-of-work mechanism cited in the Bitcoin white paper - and that he fit the expected profile (British, cypherpunk, cryptography expert). While true, this is by no means exclusive: other cypherpunks (such as Wei Dai and Nick Szabo) had conceived similar ideas for electronic currency prior to 2008.

John Carreyrou also mentions that emails made public during the Craig Wright trial reveal that Satoshi and Adam Back were in contact in 2008 as two separate individuals. Indeed, messages dated 2008 between Martti Malmi (a colleague of Satoshi) and Back show they were communicating, suggesting two distinct interlocutors. This correspondence directly weakens the single-identity hypothesis. Alternatively, Satoshi may have sought to muddy the waters by involving multiple personas, while in reality, he was acting alone. 

The journalist also recounts a filmed episode: in an HBO documentary, Back appeared nervous when addressed as a "Satoshi suspect," which, according to Carreyrou, aroused his suspicions. Finally, the NYT enlisted linguist Florian Cafiero for a global stylometric analysis: he found that, among 12 prominent suspects, Back was the closest match to Satoshi's writings.

John Carreyrou also emphasizes a strange "gap" in Back's online activity: he had been active on cypherpunk lists since the 1990s, but then "went quiet exactly at the time of Bitcoin's launch in 2009." Satoshi Nakamoto officially vanished from the radar on April 26, 2011. Despite recurring work on the subject for years, Adam Back made his first real public comment regarding Bitcoin only a few weeks after that fateful date.

Another troubling fact: In 2015, the Bitcoin community fractured over a proposal to increase the blockchain's block size. Adam Back was fiercely opposed... then, after four years of silence, Satoshi Nakamoto reappeared to support exactly that stance. For John Carreyrou, all these combined elements - identical profiles (British, cypherpunk), technical alignment (Hashcash, PGP, distributed cryptography), and stylistic clues - converge toward Back as the primary suspect.

A Need for Nuance

Adam Back reacted immediately and firmly: on the social network X, he denied being Satoshi, explaining that his long career in cryptography simply accounts for the identified similarities: "i'm not satoshi, but I was early in laser focus on the positive societal implications of cryptography, online privacy and electronic cash, hence my ~1992 onwards active interest in applied research on ecash, privacy tech on cypherpunks list which led to hashcash and other ideas."

In the remainder of his post, he points out that many experts in the field would share similar phrasing. The Bitcoin community remains highly skeptical. Many experts reiterate that stylistic analogy does not constitute formal proof. Bitcoin developer Jameson Lopp went further, accusing John Carreyrou of painting an "enormous target on Adam's back" with evidence that is "this weak."

This sudden exposure is not without risk. If Adam Back were perceived, rightly or wrongly, as Satoshi Nakamoto, he could become a prime target for criminals. Behind this hypothesis lies a simple reality: that of a man potentially associated with one of the largest Bitcoin fortunes in history - Satoshi Nakamoto remains the largest individual holder with approximately 1.096 million BTC (roughly $76bn), or 5.5% of the total supply, and none of these bitcoins have ever been moved since their creation between 2009 and 2010. In a world where anonymity has long served as protection, raising such a suspicion is akin to placing a harsh spotlight on an individual. Threats, extortion attempts, harassment, or physical pressure: for many figures in the ecosystem, the true danger of this type of investigation lies there. By publicly naming a "Satoshi suspect" based on contested clues, one does not merely fuel a historical debate; one may also expose an individual to very real risks.

Furthermore, other points warrant nuance. Stylometric analysis has several significant limitations. First, the size and heterogeneity of the corpus are problematic: Satoshi produced very few texts (primarily the white paper and a few emails), whereas these writings are compared against thousands of public messages, often co-authored or edited, which can bias the results. Second, the question of authorship is blurred: some messages, particularly on BitcoinTalk, may be the result of collaborative work, making it difficult to distinguish Adam Back's personal writing from that of co-authors. Moreover, dialectal variations complicate the analysis: Satoshi occasionally used British English and at other times American English, possibly to obscure his tracks, which can mislead algorithms. Finally, stylometry can be intentionally bypassed: an individual concerned with preserving their anonymity, as is the case with cypherpunks, can alter their writing style, simplify their phrasing, or avoid certain linguistic tics, making any identification far more uncertain.

The New York Times investigation provides intriguing new clues regarding Satoshi Nakamoto's possible identity, and John Carreyrou's work is remarkable. But ultimately, the mystery remains intact. The investigation assembles circumstantial evidence (Back's technical profile, linguistic matches, suspicious behavior) that warrants examination, yet many experts emphasize that this constitutes "weak" or "circumstantial" evidence. The Satoshi case is not closed, and only definitive proof - such as an original cryptographic signature or a movement of Satoshi's bitcoins - would be conclusive. As it stands, any theory remains speculative and the identity of Bitcoin's creator remains officially unknown.

Ultimately, it is perhaps this very mystery that provides part of Bitcoin's strength. Because Satoshi Nakamoto disappeared, the network could never be conflated with a man, a CEO, a foundation, or a company. There is no face to idolize, no founder to prosecute, no central authority to break. This self-effacement transformed Bitcoin into a pure protocol: a system that must stand on its code, its rules, and the consensus of its users, rather than the charisma or influence of its creator. Satoshi's anonymity thus protects the individual as much as the idea itself: it prevents Bitcoin from being reduced to a biography, an ego, or a human vulnerability. This is also what makes it more resilient, more decentralized, and, in a sense, more credible.

Full New York Times investigation: My Quest to Solve Bitcoin's Great Mystery