Eli5 why websites, apps and devices require complicated passwords, yet credit / debit cards only require a 4 digit pin
In: 23
In security, you can authenticate someone by using 4 factors:
* What they know (A password, a secret question)
* What they have (A key, a badge, a phone)
* What they are (Their fingerprints, their DNA)
* Where they are (Their office’s network)
A card is something you own and security is provided by you owning it. It can still be stolen just like a password.
By the way, 2 factors authentication means you use 2 of those to authenticate, mostly a password and a physical device.
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