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The selected second factor or full multi-factor solution MUST be based on the Single-Factor and Multi-Factor Authenticator Types within NIST 800-63B [3].
Second factor (used together with a memorised secret or a biometric)
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The selected second factor or full multi-factor solution MUST be based on the Single-Factor and Multi-Factor Authenticator Types within NIST 800-63B [3].
Second factor (used together with a memorised secret or a biometric)
...