This is also a question that many people are asking themselves. Since Satoshi Nakamoto is a pseudonym, he can designate one or more persons. So Satoshi is not forced to be the unique creator of Bitcoin.

Many hypotheses surfaced about his identity, from the most probable to the most far-fetched.

So, according to some people, Satoshi would be a secret group of the NSA who would use this technology to carry out cyberattacks on a large scale: wacky.

Another supposition would be a consortium of 4 major Japanese groups: SAmsung, TOSHIba, NAKAmishi, MOTOrola. Add the letters in capital letters and you come across: SATOSHI NAKAMOTO. Very well found but really unlikely.

However, hypotheses a little more supposed were mentioned.

It could be Nick Szabo, a member of an activist movement on the Web in the 90s. He also invented with friends the concept Bitgold, a precursor of Bitcoin? Perhaps…
In any case, Nick Szabo, although flattered, denies these assumptions.
His profile is very similar to that of Satoshi.
There are other contenders but this one remains the most likely.
It is also the subject of study of a book written by Dominic Frisby: "Bitcoin: The Future of Money".

Satoshi's white paper
In order for everyone to know how bitcoin works and why it was created, Satoshi wrote the whole operation of this system.