Two factor authentication solutions are available for systems which require increased security. One option is called one time password (OTP) tokens. This is where a user is issued a password to log into the system, after filling out information like their name, department, email, and so on. This password can only be used once, and the next time they need access, they have to go through the entire process all over again.
Two Factor Authentication with Digital Certificates Is another Option
The other option for two factor authentication is using digital certificates. Once a digital certificate is issued to a user, it is installed onto their computer. Anytime they need to log into the system, they just choose and supply the correct certificate. Once the certificate has been authenticated, then they are allowed to enter their user name and password. Using a digital certificate eliminates the time consuming processes of obtaining OTP tokens.