Tsutomu Shimomura

is a Japanese-born physicist and computer security expert. He is known for helping the FBI track and arrest hacker Kevin Mitnick. ''Takedown'', his 1996 book on the subject with journalist John Markoff, was later adapted for the screen in ''Track Down'' in 2000.

Shimomura was a founder of semiconductor company Neofocal Systems, and was CEO and CTO until 2016. Provided by Wikipedia