Victor Ivanovich Sheymov (9 May 1946, Moscow — 18 October 2019, Vienna (Va.)) is a Russian computer security expert, author and patent holder of computer security innovations.
A former intelligence official with the rank of major in the Soviet KGB, Sheymov defected to the United States in May 1980, choosing to come out of hiding a decade later.Since becoming a US citizen, Sheymov has been active in the computer security industry as the CEO of Invicta Networks, a Northern Virginia-based developer of advanced cyber-security technologies.
He has also published a memoir, Tower of Secrets, about his experiences in the KGB and life in the United States.