Satoshi Nakamoto is a person or group of people who created the Bitcoin protocol and reference software, Bitcoin Core. In 2008, Nakamoto published a paper[1][2] on The Cryptography Mailing list at metzdowd.com[3] describing the Bitcoin digital currency. In 2009, he released the first Bitcoin software that launched the network and the first units of the Bitcoin currency, called bitcoins.[4][5]

Nakamoto is said to have continued to contribute to his Bitcoin software release with other developers until contact with his team and the community gradually began to fade in mid-2010. Near this time, he handed over control of the source code repository and alert key functions of the software to Gavin Andresen.[6] Also around this same time, he handed over control of the Bitcoin.org domain and several other domains to various prominent members of the Bitcoin community.

Nakamoto is believed to be in possession of roughly one million bitcoins. At one point in December 2013, this was the equivalent of US$1.1 billion.[7] Nakamoto's true identity remains unknown, and has been the subject of much speculation. It is not known whether the name "Satoshi Nakamoto" is real or a pseudonym, or whether the name represents one person or a group of people.

On his P2P Foundation profile, Nakamoto claimed to be a 37-year-old male who lived in Japan, while others speculated he was unlikely to be Japanese due to his use of perfect English and his Bitcoin software not being documented nor labelled in Japanese.[8]

Some considered Nakamoto might be a team of people; Dan Kaminsky, a security researcher who read the Bitcoin code,[9] said that Nakamoto could either be a "team of people" or a "genius";[10] Laszlo Hanyecz, a former Bitcoin core developer who had emailed Nakamoto, had the feeling the code was too well designed for one person.[11]

Occasional British English spelling and terminology (such as the phrase "bloody hard") in both source code comments and forum postings led to speculation that Nakamoto, or at least one individual in the consortium claiming to be him, was of Commonwealth origin.[1][10][11]

Stefan Thomas, a Swiss coder and active community member, graphed the time stamps for each of Nakamoto's bitcoin forum posts (more than 500); the resulting chart showed a steep decline to almost no posts between the hours of 5 am and 11 am Greenwich Mean Time. Because this pattern held true even on Saturdays and Sundays, it suggested that Nakamoto was asleep at this time.[8] If Nakamoto is a single individual with conventional sleeping habits, it suggests he resided in a region using the UTC05:00 or UTC06:00 time offset. This includes the parts of North America that fall within the Eastern Time Zone and Central Time Zone, as well as parts of Central America, the Caribbean and South America.

Many articles have been written about possible identities of Nakamoto. Some notable speculations about his identity include:

In December 2013, a blogger named Skye Grey linked Nick Szabo to the Bitcoin's whitepaper using a stylometric analysis.[23][24][25] Szabo is a decentralized currency enthusiast and published a paper on "bit gold", which is considered a precursor to bitcoin.[24][25] He is known to have been interested in using pseudonyms in the 1990s.[26] In a May 2011 article, Szabo stated about the Bitcoin creator: "Myself, Wei Dai, and Hal Finney were the only people I know of who liked the idea (or in Dai's case his related idea) enough to pursue it to any significant extent until Nakamoto (assuming Nakamoto is not really Finney or Dai)."[27] In his book, Bitcoin: The Future of Money?, and on RT's The Keiser Report, author and investigative reporter Dominic Frisby also claims that he is fairly certain that Nick Szabo is Satoshi Nakamoto. Quoted from The Keiser Report "I've concluded there is only 1 person in the whole world that has the sheer breadth but also the specifity of knowledge and it is this chap...".[28]

The most high-profile speculation to date came in a March 6, 2014, article in the magazine Newsweek,[29] when journalist Leah McGrath Goodman identified Dorian Prentice Satoshi Nakamoto, a Japanese American man living in California, whose birth name is Satoshi Nakamoto,[29][30][31] as the Nakamoto in question. Besides his name, Goodman pointed to a number of facts that circumstantially suggested he was the Bitcoin inventor.[29] Trained as a physicist, Nakamoto worked as a systems engineer on classified defense projects and computer engineer for technology and financial information services companies. According to his daughter, Nakamoto was laid off twice in the early 1990s and turned libertarian, encouraging her to start her own business and "not be under the government's thumb." In the article's seemingly biggest piece of evidence, Goodman wrote that when she asked him about Bitcoin during a brief in-person interview, Nakamoto seemed to confirm his identity as the Bitcoin founder by stating: "I am no longer involved in that and I cannot discuss it. It's been turned over to other people. They are in charge of it now. I no longer have any connection."[29] (This quote was later confirmed by deputies at the Los Angeles County Sheriff's Department who were present at the time.)[32]

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