Something that looks like a protocol but does not accomplish a task is not a protocol—it’s a waste of time.

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

There are two types of encryption: one that will prevent your sister from reading your diary and one that will prevent your government.

There are two kinds of cryptography in this world: cryptography that will stop your kid sister from reading your files, and cryptography that will stop major governments from reading your files.

Amateurs hack systems, professionals hack people.

More people are killed every year by pigs than by sharks, which shows you how good we are at evaluating risk.

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

Security is a process, not a product.

If someone steals your password, you can change it. But if someone steals your thumbprint, you can't get a new thumb. The failure modes are very different.

Don't make the mistake of thinking you're Facebook's customer, you're not - you're the product.

I am regularly asked what the average Internet user can do to ensure his security. My first answer is usually 'Nothing; you're screwed'.

Anger should be your servant, not your master

Coming back to where you started is not the same as never leaving.

It was as though applied mathematics was my spouse, and pure mathematics was my secret lover.

No one's ever completely broken. It's just a matter of how much has to fall apart before the ember of life is exposed to air.

For every problem, there exists a simple and elegant solution which is absolutely wrong.

When the middle class thrives, the country thrives, and when it doesn't, we don't.

To be satisfied with what one has; that is wealth. As long as one sorely needs a certain additional amount, that man isn't rich.

I think most serious and omnivorous readers are alike- intense in their dedication to the word, quiet-minded, but relieved and eagerly talkative when they meet other readers and kindred spirits.

Dashiell Hammett took murder out of theVenetian vase and dropped it into the alley.

Marketing yourself to a new person often involves being charismatic, clever and quick-but most jobs and most relationships are about being consistent, persistent and brave.