It has been a long while since there has been a massive interruption of internet access and/or damaging viruses on a large scale adversely affecting us. I wonder how much of our world's economies and security have become overly dependent on one thing – the uninterrupted functioning of networks and systems that comprise the internet. Is there a critical weakness at present in our security that we have adapted to so much dependence on the systems and technology that support the internet? Banking, trading, the stock markets, credit cards, e-commerce, business communications, personal communications, military communications, telephony etc. Has this reliance made us complacent? I know I'd have a much more difficult time conducting business if I had to go back to faxes and telephone calls, presuming that even that technology would be available in the event of the other systems going down. I'd have to book more couriers (they'd be all running late and costs would escalate), allow for more travel and meetings. I'd have to print and distribute more documents. My productivity would nosedive, as would my profits. I'd adapt by going back to older technologies, but at a significant cost increase. I do the work of 2-3 people these days compared to what could be accomplished back in the 1980s and 90s, but my charges to clients have not really increased much, or even kept up with inflation. I would be struggling mightily to keep up. If it persisted for a long period I'd need to hire assistance (again cutting my profits) or I might lose business as a result. Could our enemies or perhaps some bored yet malevalent hacker exploit a software or hardware weakness to "cripple" us or wreak mass economic havoc?