A Password So Secure, You Don't Even Know What It Is

Researchers have demonstrated a super-secure password system that relies on "implicit" learning
Photograph by Hal Bergman

There are two problems with a password. The first is that you can forget it. The second is that you know it and someone else can get you to cough it up. As any hacker knows, people are usually the weakest link in any security system. We’re trusting, gullible, and, if trickery fails, there’s always blackmail or violence—the term for this sort of coercive code-cracking is rubber hose cryptanalysis.

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