Send OTP – Best Practices For Two-Factor Authentication

Send OTP – Best Practices For Two-Factor Authentication

A growing user population calls for a growing opportunity to conduct business while on-the-move. And with increased opportunity comes increased responsibility, along with heightened vulnerability.

Users these days are always in a rush and using an easy password to access their network is quite tempting making it vulnerable to hackers. Implementing a strong two-factor authentication system is the need of the hour.

For accounts where security is the utmost concern, 2FA greatly reduces the chance of the account being compromised.

A Password Just Isn’t Good Enough

A strong password stored safely can go a long way in keeping your accounts secure, but not many of us create strong passwords, let alone store them securely. Also, every time we login we are asked to feed the password and every time it presents a chance of the password being stolen. Whatever precautions you take, you can fall victim to attacks.

But Not With Two-Factor

The second authentication factor isn’t the same every time you login so even if your password does get stolen, there’s a good chance your account would be secured as the second authentication factor isn’t compromised.

More Factors, Fewer Problems

2FA would enhance security only if the two channels (something you know and something you have) are independent as it will reduce the chances of both the channels being compromised at the same time. And it will only happen when the two authentication factors are stored on different devices.

Two-factor authentication is a tool and to use this tool effectively, you should know how it works.

On the basis of a static secret key and a moving factor, the dynamic OTP is generated and by providing the correct OTP it is confirmed that the secret key is correct as without the secret key it would be hard to produce the correct OTP. The secret key is kind of the traditional password – static codes – different in terms of how they are confirmed.

The vulnerability of a traditional password is that it has to be revealed each time it is confirmed, but a two-factor device allows a secret to be confirmed without directly revealing the secret. It is confirmed indirectly by checking for the correct OTP on each login.

A recommended best-practice for protecting sensitive data, here’s what you need to know before you use OTP services for 2FA.

# Use 2FA to confirm sensitive actions

2FA is the extra layer of authentication that goes beyond the basic model of a username and a password. When you log in an account, the website will ask you for a code from your phone. If an attacker doesn’t have your phone, they can’t get the code, so they can’t log in.

# The OTP should be in the first few words

  • Your verification code is 4343 for your Quickr request.  
  • 4343 is your Facebook confirmation code.
  • Thank you for signing up. To confirm this contact number, your code is 4343.

Which one works best for you?

P.S. you most probably would be seeing it on your mobile device 😉

# A service that allows retry

A one-time password is usually employed for sensitive information including account updates, logging in securely to an account, completing a monetary transaction and such.

If an OTP is not received within the limited timeframe you can understand the disturbance it can create in a user’s mind, also resulting in loss of trust in your service.

Retry options are like plan B, if plan A doesn’t work, you have plan B to bank on.

# User-friendly panel for sending OTP

Generating and sending OTP should not be a task. A user-friendly panel makes it easier to send OTP, even if the OTP is required to be resent.

# A time-sensitive OTP delivery service

One-time password is time-sensitive and should not be treated as an SMS. It requires to be sent through a different route. A dedicated infrastructure is needed for the time-sensitive OTP that needs to be delivered come what may.

SendOTP – Two-Factor Authentication



Using SendOTP as 2FA reduces the dependency on passwords decreasing vulnerability and the chance of a successful attack. The OTP that is produced and sent over SMS to input along with the password is for a one-time use only and changes with every login making it dynamic.

The algorithm attached to SendOTP makes it unique as it does not, in any case, let the OTP fail. If undelivered by SMS, the OTP is sent over a voice call ensuring your OTP is delivered; come what may.


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