If you say to people that ...

If you say to people that they, as a matter of fact, can't protect their conversations, in particular their political conversations, I think you take a long step toward making a transition from a free society to a totalitarian society.
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 Whitfield Diffie

Quotes from the same author

I understood the importance in principle of public key cryptography but it's all moved much faster than I expected. I did not expect it to be a mainstay of advanced communications technology
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 Whitfield Diffie
If you have ambition, you might not achieve anything, but without ambition, you are almost certain not to achieve anything.
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 Whitfield Diffie
I liked Berkeley tremendously, Berkeley was a very leftist campus. I came to love that city as much as I love Paris or the south of France or New York.
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 Whitfield Diffie