Authentication using One Time Password (OTP)
The point of two-factor authentication is to prevent attackers from getting access to your account. Two-factor authentication requires that two tokens be provided for proof of ownership of the account. The first token is something that we're all familiar with- a username and a password. The second token is a bit more elusive, however. It should be something you have, and only you. No one else should be able to come into possession with the same token. The same should be true for usernames and passwords, but we've seen how easily broken a single-factor authentication system is. The traditional way of just memorizing the password to validate one’s identity is not enough and web sites and applications are now expecting one to possess email Id or a smartphone to communicate with another short-lived randomized password, One Time Password (OTP) , as one more factor to the authentication. The first approach in the implementation of the two factor authenticati