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"Something you have" proved by "Something you know" #1990

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maurocasonato opened this issue Jul 21, 2021 · 1 comment
Open

"Something you have" proved by "Something you know" #1990

maurocasonato opened this issue Jul 21, 2021 · 1 comment

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@maurocasonato
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In 800-63B 5.1.2 "Look-Up Secrets" and 5.1.4 "Single-Factor OTP Device" the possession respectively of a look-up secret authenticator and of an OTP device is proved by the knowledge of a secret that has to be transmitted to the verifier.

The secret may be disclosed to an attacker, which can lure the claimant for example using the technical support scam, see 8.1 "Authenticator Threats".

Conclusion: to prove "something you have" by "something you know" degrades what you have to what you know, or in another words using a look-up secret authenticator or an OTP device does not change the authenticator factor that remains "Something you know", as defined in 800-63-3 4.3.1 "Authenticators".

@cellarweasel
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phishing resistance I believe is trait you're looking for.

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@cellarweasel @maurocasonato and others