+8.1.2.7 Multi-Factor Cryptographic Authenticator

8.1.2.7 Multi-Factor Cryptographic Authenticator

Typical Usage

To authenticate, users prove possession and control of the cryptographic key and control of the activation factor. Usability considerations for the additional factor also apply (see Sec. 8.1.2.1 for passwords and Sec. 8.1.4 for biometrics used as activation factors).

Usability considerations for typical usage include the following:

Give cryptographic keys appropriately descriptive names that are meaningful to users so that they can recognize and recall which cryptographic key to use for which authentication task. This prevents users from having to deal with multiple similarly and ambiguously named cryptographic keys. Selecting from multiple cryptographic keys on smaller mobile devices may be particularly problematic if the names of the cryptographic keys are shortened due to reduced screen sizes.

Do not require users to keep external multi-factor cryptographic authenticators connected following authentication. Users may forget to disconnect the authenticator when they are done with it (e.g., forgetting a smartcard in the smartcard reader and walking away from the computer).
Users need to be informed about whether the authenticator is required to stay connected or not.
For connected authenticators, the limited availability of a direct computer interface (e.g., USB port) could pose usability difficulties. For example, laptop computers often have a limited number of USB ports, which may force users to unplug other USB peripherals to use the authenticator.

1. Resumen

1.1 Referencias

1.2 Requisitos identificados

1.3 Regulaciones relacionadas

2. Requisitos identificados

Requisitos

3. Regulaciones relacionadas

Regulaciones
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