The very definition of news is something that hardly ever happens. If an incident is in the news, we shouldn't worry about it. It's when something is so common that its no longer news - car crashes, domestic violence - that we should worry.

Societies without a reservoir of people who don't follow the rules lack an important mechanism for societal evolution. Vibrant societies need a dishonest minority; if society makes its dishonest minority too small, it stifles dissent as well as common crime.

Surveillance of power is one of the most important ways to ensure that power does not abuse its status. But, of course, power does not like to be watched.

If you think technology can solve your security problems, then you don't understand the problems and you don't understand the technology.

I tell people: if it's in the news, don't worry about it, because by definition, news is something that almost never happens.

Terrorism is a crime against the mind. We win by refusing fear.

People often represent the weakest link in the security chain and are chronically responsible for the failure of security systems.