Adam Back denies NYT report naming him as Bitcoin's creator

British cryptographer Adam Back has denied being Bitcoin creator Satoshi Nakamoto after an investigation by The New York Times named him as the most compelling candidate identified to date.

"I'm not satoshi [sic]," Back wrote in a post on X $TWTR. He said his decades of work on cryptography, online privacy, and electronic cash — dating to about 1992 — explains why investigators keep finding connections between his background and Bitcoin's design. "The rest is a combination of coincidence and similar phrases from people with similar experience and interests," he wrote.

Pulitzer Prize-winning reporter John Carreyrou's investigation took shape over more than a year, during which he sifted through thousands of decades-old internet postings. Working with the outlet's AI projects editor Dylan Freedman, Carreyrou assembled email archives from three Cypherpunk mailing lists spanning roughly 1992 to 2008, merged them into a single database, and subjected the combined record to three distinct writing analyses — each of which returned Back as the top match for Satoshi.

The investigation cataloged a range of stylistic fingerprints in Satoshi's writing — double-spacing after periods, British spellings, a hyphenated "double-spending," and an inconsistent toggle between "e-mail" and "email" — and found that no one else across the hundreds of subscribers to those lists replicated every one of them. Back did.

The report also highlighted that Back created Hashcash, the proof-of-work mechanism Bitcoin would later adopt, and drew attention to a conspicuous gap in his online activity: although he had been a reliable voice in Cypherpunk discussions about electronic money for years, he went silent precisely when Bitcoin was announced. According to the investigation, Back's first public comment about Bitcoin came six weeks after Satoshi went dark for good.

Back also pushed back on how the article framed a comment he made during an interview — a remark about his prolific posting history that was treated as a potential inadvertent admission. Back said it was nothing of the sort; he was making the opposite point, that his sheer volume of archived writing gives stylometric tools more material to work with, making a match to Satoshi more likely regardless of authorship.

Reactions from others in the crypto space were skeptical. Odd Lots co-host and Bloomberg columnist Joe Weisenthal voiced doubts on X, writing that he was "not 100 percent convinced by the evidence or the conclusion." He raised two specific objections: that punctuation habits are too inconsistent across writers to serve as reliable identifiers, and that it was hard to reconcile a scenario in which Back attached his name to foundational prior work such as Hashcash but then operated under total anonymity for Bitcoin itself. U.K.-based early Bitcoiner Nicholas Gregory said his own experience with Back led him to a different conclusion, adding that the broader effort to unmask Satoshi carries real dangers — for whoever that person turns out to be, and for their family.

Back leads Blockstream as its co-founder and CEO, a firm focused on developing infrastructure that supports blockchain-based payment systems. Claims about Satoshi's identity have surfaced repeatedly over the years. Developer Peter Todd was put forward as a candidate in a high-profile 2024 documentary and likewise rejected the identification.