Surveillance of power is one ...

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.
 Bruce Schneier

Quotes from the same author

When my mother gets a prompt 'Do you want to download this?' she's going to say yes. It's disingenuous for Microsoft to give you all of these tools with which to hang yourself, and when you do, then say it's your fault.
 Bruce Schneier
Computer security can simply be protecting your equipment and files from disgruntled employees, spies, and anything that goes bump in the night, but there is much more. Computer security helps ensure that your computers, networks, and peripherals work as expected all the time, and that your data is safe in the event of hard disk crash or a power failure resulting from an electrical storm. Computer security also makes sure no damage is done to your data and that no one is able to read it unless you want them to.
 Bruce Schneier
History has taught us: never underestimate the amount of money, time, and effort someone will expend to thwart a security system. It's always better to assume the worst. Assume your adversaries are better than they are. Assume science and technology will soon be able to do things they cannot yet. Give yourself a margin for error. Give yourself more security than you need today. When the unexpected happens, you'll be glad you did.
 Bruce Schneier
Trying to make bits uncopyable is like trying to make water not wet. The sooner people accept this, and build business models that take this into account, the sooner people will start making money again.
 Bruce Schneier
Something that looks like a protocol but does not accomplish a task is not a protocol—it’s a waste of time.
 Bruce Schneier