Alex Kasper (born Alexis Kasperavičius) is a cybersecurity expert whom legendary hacker Kevin Mitnick called his "unindicted co-conspirator." The two later partnered to develop and teach corporate and government security training programs worldwide. Kasper appears as himself in the documentary Freedom Downtime (2001) and served as a consultant on Miramax's Takedown (2000).

He produced and sound designed Return Fire (1995), a critically acclaimed tactical strategy video game that won The 3DO Company's Two-Player Game of the Year award and was later ported to Sony PlayStation and Microsoft Windows. He also produced director Elizabeth Allen Rosenbaum's USC thesis short Eyeball Eddie (2001), an award-winning film starring Martin Starr (in his film debut), Michael Rosenbaum, and M. Emmet Walsh.