4.1.2.1 Binding an Additional Authenticator

To minimize the need for account recovery, CSPs and verifiers SHOULD encourage subscribers to maintain at least two separate means of authentication. For example, a subscriber who usually uses an OTP authenticator as a physical authenticator MAY also be issued look-up secret authenticators or register a device for out-of-band authentication to be used if the physical authenticator is lost, stolen, or damaged. See Sec. 4.2 for more information on replacing passwords.

Accordingly, CSPs SHALL permit the binding of multiple authenticators to a subscriber account. When any new authenticator is bound to a subscriber account, the CSP SHALL ensure that the process requires authentication at either the maximum AAL currently available in the subscriber account or the maximum AAL at which the new authenticator will be used, whichever is lower. For example, binding an authenticator that is suitable for use at AAL2 requires authentication at AAL2 unless the subscriber account currently has only AAL1 authentication capabilities. When an authenticator is added, the CSP SHALL notify the subscriber via a mechanism independent of the transaction binding the new authenticator, as described in Sec. 4.6.

1. Ħarsa ġenerali

1.1 Referenzi

1.2 Rekwiżiti identifikati

1.3 Regolamenti relatati

2. Rekwiżiti identifikati

3. Regolamenti relatati

• NIST -

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