My morning mail traffic contained a very sobering post to one of the security mailing lists I follow regarding the security of industrial control systems. Choice quotes include:

The typical lifetime of an industrial control system is can be 10 to 15 years. Chew on that for a minute. What were YOU playing with 15 years ago?

And:

There is much to be afraid of. Cities depend on an infrastructure that runs all too well; utilities are so reliable that we forget about how integral they are to daily life. We’re nearly invisible until something breaks. Think of this the next time you flush your toilet. How long could a large city last without water? The only people who sleep well in my industry are those who do not understand the problem.

Makes you think…