This is the five possible candidate :
1. Nick Szabo - A researcher name Skye Grey he believe that Nick Szabo is the real Satoshi Nakamoto. Nick Szabo developed system called "Bit gold" which is direct precursor of Bitcoin Architecture.Nick Szabo have 10 years experienced in crypto currency so the people and media interested to him that he is the real Satoshi Nakamoto.But he denied that he is not the real Satoshi Nakamoto.But he is possible candidate that he is Satoshi Nakamoto.
2.Michael Clear - a professional and graduate of cryptography course.Michael clear is a co-authored of an Academic peer to peer technology the first ever Bitcoin Academic. Joshua Davis accused Michael Clear that he is the real Satoshi Nakamoto but Michael Clear denied it.
3.Dorian Nakamoto - a Japanese American man living in California , whose birth name is Satoshi Nakamoto. Nakamoto worked as a systems engineer on classified defense projects and computer engineer for technology and financial information services companies.Journalist Leah McGrath Goodman article pointed that Dorian Nakamoto is the real Satoshi Nakamoto based on his birth name and some numbers of fact that Dorian Nakamoto is Satoshi Nakamoto.But Dorian Nakamoto denied it.
4.Craig Steven Wright - according to his blog he claiming publicly that he is the real Satoshi Nakamoto supported by the signed message using the private key associated with the first Bitcoin transaction. Wright's claim was supported by Jon Matonis (former director of the Bitcoin Foundation) and bitcoin developer Gavin Andresen, both of whom met Wright and witnessed a similar signing demonstration.But later days Bitcoin Developers Gavin Andresen said that he no longer believed that Craig Steven Wright is the real Satoshi Nakamoto.
5. Jed MacCaleb - Founder and responsible of creating Tokyo based exchange called Mt. Gox . He is interesting and possible that he is the real Satoshi Nakamoto.
But even they are some possible candidates that listed above we didn't find the true and the real Satotshi Nakamoto.They are someone protecting him/her to publish publicly his/her real identity.Or just he didn't want to know him at all for some purposes.
In my opinion secret services agency and FBI know the true identity of Satoshi Nakamoto.Because they have many connections and influences all over the world.And im think they protecting Satoshi Nakamoto because they are using Bitcoin also.What do you think guys you have some opinion why we didn't find the real Satoshi Nakamoto until now?
Bitcoin founder Possible Candidates sources:
HuffingtonPost
Wikipedia