SFA security relies on the diligence of the user, who should take additional precautions -- for example, creating a strong password and ensuring that no one can access it. For applications that require greater security, it may be advisable to implement more complex systems, such as multifactor authentication.
Single-factor authentication (SFA) is the traditional security process that requires a user name and password before granting access to the user.
In a two-factor authentication system, the user provides dual means of identification, one of which is typically a physical token, such as a card, and the other of which is typically something memorized, such as a security code.
