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Definition
In a SIM swap, the fraudster persuades your mobile provider to move your number to a SIM they control, then intercepts any codes or resets sent by text. It's a key reason SMS is the weakest form of 2FA.
Why it matters for your business
Using an authenticator app or a passkey instead of SMS codes defeats it, because those don't depend on your phone number. Watch for a sudden loss of mobile signal as a warning sign.
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Passkey
A passkey signs you in using your device's own unlock (fingerprint, face or PIN) instead of a typed password,…
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