Robert Bigman

Robert Bigman

Former CIA security chief Robert Bigman attends the two-day 20th international Information Security Summit (IS2), held by TATE International, publishing Data Security Management journal, which starts at Karolinum grand hall in Prague, Czech Republic, on Wednesday, May 29, 2019. (CTK Photo/Katerina Sulova)

Robert Bigman

Robert Bigman

Former CIA security chief Robert Bigman attends the two-day 20th international Information Security Summit (IS2), held by TATE International, publishing Data Security Management journal, which starts at Karolinum grand hall in Prague, Czech Republic, on Wednesday, May 29, 2019. (CTK Photo/Katerina Sulova)

Robert Bigman

Robert Bigman

Former CIA security chief Robert Bigman attends the two-day 20th international Information Security Summit (IS2), held by TATE International, publishing Data Security Management journal, which starts at Karolinum grand hall in Prague, Czech Republic, on Wednesday, May 29, 2019. (CTK Photo/Katerina Sulova)

Robert Bigman

Robert Bigman

Former CIA security chief Robert Bigman attends the two-day 20th international Information Security Summit (IS2), held by TATE International, publishing Data Security Management journal, which starts at Karolinum grand hall in Prague, Czech Republic, on Wednesday, May 29, 2019. (CTK Photo/Katerina Sulova)

Robert Bigman

Robert Bigman

Former CIA security chief Robert Bigman attends the two-day 20th international Information Security Summit (IS2), held by TATE International, publishing Data Security Management journal, which starts at Karolinum grand hall in Prague, Czech Republic, on Wednesday, May 29, 2019. (CTK Photo/Katerina Sulova)