The mobile app Nexus Personal Mobile can be used for online two-factor authentication (2FA) using push notifications. With online authentication, access requests are sent via out-of-band notifications to an associated mobile device that a user then approves or denies. Personal Mobile can also be used for offline one-time password (OTP) authentication.
For the online authentication mode, either raw keys or certificates can be used.
Manage mobile identities with Smart ID
Mobile identities can easily be managed by the Smart ID Credential Manager. See the use cases here: Mobile ID management.