E4M / TrueCrypt-precursor author and convicted criminal mastermind
In December 1998, a Rhodesian-born programmer named Paul Le Roux released Encryption for the Masses (E4M) — an open-source disk-encryption package. Evan Ratliff writes that he announced it on a cryptography mailing list in 1999; Der Standard says he presented it in the Usenet newsgroup alt.security.scramdisk. Its codebase was later built into TrueCrypt, first released in February 2004.
By the mid-2000s Le Roux had moved on from cryptography and built a sprawling international criminal enterprise — RX Limited online pharmacies, arms trafficking, methamphetamine production — chronicled in journalist Evan Ratliff’s 2019 book The Mastermind. He was arrested by US authorities in Liberia in September 2012 and has been incarcerated and cooperating with the US Drug Enforcement Administration since.
Le Roux (born December 24, 1972 in Bulawayo, Rhodesia — now Zimbabwe) is named in some Satoshi identity hypotheses, which cite his cypherpunk-era cryptography credentials and timing.
In December 1998 Le Roux released Encryption for the Masses (E4M), a free open-source disk-encryption package, distributed under an open-source license. By Ratliff’s account he announced the project on a cryptography mailing list, released the source on his website, and answered technical questions. In February 2004 the E4M codebase was built into TrueCrypt, which became one of the most widely deployed open-source disk-encryption packages of the 2000s and 2010s. The TrueCrypt project’s original developers remained anonymous and the lineage from E4M was the subject of years of speculation about Le Roux’s possible authorship of TrueCrypt itself, which he denies.
From the early 2000s Le Roux’s operational focus shifted from open-source cryptography to building an international criminal organization. The enterprise spanned multiple verticals: RX Limited (a network of US online pharmacies dispensing controlled prescriptions of disputed legality), arms trafficking, methamphetamine production in the Philippines, gold-smuggling operations, and contract violence. The full scope is documented in Evan Ratliff’s The Mastermind (Random House, 2019) and the accompanying Atavist Magazine long-form series.
In September 2012 Le Roux was arrested by US authorities in Liberia after being lured there in a sting operation. He immediately became a DEA cooperator, providing extensive evidence against members of his own organization. He was sentenced to 25 years in US federal prison in 2020 — substantially reduced, in exchange for his cooperation, from the maximum possible sentence of life imprisonment. He has made no public statement on the Satoshi-identity question.
Le Roux’s connection to the Satoshi-identity question is entirely external — there is no documented contact with Satoshi Nakamoto, no statement by Le Roux on the question, and no Bitcoin-related material in the public record from him. His name entered the question in 2019, through online speculation and Evan Ratliff’s July 2019 WIRED feature, written after The Mastermind, on a capability-plus-covertness-plus-motive argument. The case for and against, and the 2026-05-03 van Dorst corpus reanalysis that excludes him from its stylometric candidate set, are laid out in the Paul Le Roux = Satoshi hypothesis; see the identity-hypotheses overview (§2.1) for the comparison with the other named candidates.
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He wrote E4M, then built a criminal empire. The case Evan Ratliff, author of The Mastermind, set out in 2019 for Paul Le Roux as Satoshi, weighed.
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.
Twelve recurring Satoshi candidates, compared across four independent layers: profile match, stylometric attribution, direct correspondence and development environment.