Who is Keyser Soze???????????????

Rating: 10/10 (31 May 2005)

WHO WAS KEYSER SOZE??????????
Can anyone please help me with this. When i first saw this film i thought that it was Kevin Spacey
But when you think about it it could have also been the Hungarian who put Verbal on the boat and then stamped him as Soze to protect his own ass.
OR Kobayashi was Keyser Soze and Kevin Spacey was sent to the boat by him. OR Someone we never see. OR Maybe there was no Keyser Soze and he was used as a shield or hoax story. help
"Long is the way and hard that out of hell leads to light" John Doe