ars tehcnica – Google’s Adam Langley feels that encryption is now so cheap that it should be applied to all web traffic. So from now on, please type HTTPS instead of HTTP in all of your URLs.
Oh wait, that’s not what Langley had in mind. Actually, he suggests that encryption should activate opportunistically without user intervention. And without having to wait for additional network packets. Opportunistic encryption means getting encryption where you can—without first exchanging encryption keys or building a large public key infrastructure (PKI).
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