It's not just the security of our financial transactions, credit cards, etc. that is of concern.
From Reuters via Yahoo:
Homeland Security Secretary Janet Napolitano warned on Thursday that a major cyber attack is a looming threat and could have the same sort of impact as last year's Superstorm Sandy, which knocked out electricity in a large swathe of the Northeast.
Napolitano said a "cyber 9/11" could happen "imminently" and that critical infrastructure - including water, electricity and gas - was very vulnerable to such a strike.
[...] Officials have pointed to recent hacking attacks on U.S. banks as a sign that the cyber threat is real and growing.
"The clarion call is here and we need to be dealing with this very urgently," said Napolitano. "Attacks are coming all the time. They are coming from different sources, they take different forms. But they are increasing in seriousness and sophistication."