Computer Science / CS 0323 · Atom · ~20 seconds
Two-Factor Authentication
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Two-factor authentication pairs the password with a second factor such as a phone-delivered one-time passcode — an attacker then needs the secret and the physical key together.
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A bank login that texts a code has doubled what theft requires.
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Two factors, two different kinds of thing — that is the strength.
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- Nothing yet depends on this.