Editor's note: CNN Contributor Bob Greene is a best-selling author whose 25 books include "Late Edition: A Love Story" and the novel "All Summer Long." He appears on "CNN Newsroom" Sundays during the 5 p.m. ET hour. The opinions expressed in this commentary are solely those of Bob Greene.
(CNN) – CNN Contributor Bob Greene examines how the more connected our lives are to the Internet, the more threatened we are by cyber attacks.
[1:29] "Virtual reality is not reality. A virtual store is distinct from a brick-and-mortar operation. But as we live more and more of our lives online and as basic needs depend increasingly on digital commands, the distinction between cyber and actual is disappearing."
[2:33] "General Keith B. Alexander, head of the National Security Agency, has said that there has been a 17-fold increase in computer attacks on the American infrastructure– on the basic things we count on to keep our world going. It may all be cyber, but it's starting to feel kind of real."
See all of Bob Greene's columns at CNN Opinion