Computer Science / Unit 6 CS 0323 short lesson, about 20 seconds
Two-Factor Authentication
Captions available
The idea
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.
In practice
A bank login that texts a code has doubled what theft requires.
Where people slip
Two factors, two different kinds of thing — that is the strength.
Your place on the trail
Every lesson rests on earlier ones and opens later ones. Tap any to jump.
Builds on
Unlocks
- Nothing yet depends on this.
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