Computer recognition software: Users can make use of computer as a second authentication factor with the installation of an authentication software plugin. This plugin includes a cryptographic device marker, which can then be validated as the second factor in the course of authentication process.
Biometrics: Utilizing biometrics as the second factor involves verification of physical characteristics like fingerprints or retinal images with the help of a dedicated hardware device.
E-mail or SMS one-time password (OTP): Using SMS or e-mail OTP as a second factor involves sending of a second one-time password to a registered mobile number or e-mail address. The user can then make use of this second OTP along with their standard password to authenticate the process.
