You might have experienced it several times. You are on a website and need to sign in to your account after a while, or you are using a different device to access your account. Then, you are required to provide an additional code forwarded to your phone number or email address to proceed even after supplying your password. This is what two-factor authentication or multi-factor authentication is all about. 

Two-factor authentication (2FA) is an online method of authentication in which a user is asked to provide two pieces of evidence before being granted access to a website or an online application. This protects the data of the user from being accessed by an unauthorized third party that might have gained access to his/her password. 

It is being used as an extra layer of security by many businesses and organizations, such that even if someone else has access to your password, that individual is unable to gain access to your account or carry out transactions. This is because a random password that varies in the number of digits would still be sent to your phone number to confirm your identity before they proceed with those actions. 

This code is not one that you would need to store in a place or remember, as it expires as soon as it is used for that purpose. That is why it is usually given the name OneTime Password or OTP. 

Use Voice OTP for Two Factor Authentication (2FA)

When it comes to using OTP for Two Factor Authentication, there are different options available. You can either send this through SMS, which is actually the most popular one, or you can send it through Voice. Each of these methods has its pros and cons, and you can see how they both compare here. 

After careful study of both methods of OTP delivery though, we have come to conclude that Voice OTP is a very brilliant option and probably the best option right now for your Two Factor Authentication system. And for obvious reasons. 

One reason why you should consider using Voice OTP for this purpose is that we now live in the DND era, where a lot of phone numbers no longer receive SMS. Because of this, many customers face difficulties with receiving OTPs sent through SMS. And this is presently causing havoc and losses for businesses. However, with Voice OTP, such challenges are not there, and delivery is assured. 

Also, because of how sensitive the information for Two Factor Authentication is, it is best that such a sensitive message as OneTime Password be delivered in such a way that a third party does not have access to it. With SMS, someone can look over your shoulder or even get it off your phone while it is locked without you knowing. However, with a Voice OTP that comes as a phone call, there are more cautious ways to receive this secretively. See all Voice OTP best practices here. 

There is also the challenge of delay of SMS delivery which is not good for OTPs because they usually have an expiration period, which if it is not used within that time, becomes invalid. Hence, you would need a delivery channel that is not only guaranteed to deliver but also delivers quickly. In this area also, Voice OTP is a winner. 

Two-factor authentication (2FA) has come to stay, thanks to the success it has brought in ensuring the safety and security of online transactions. We hope that with Voice OTP, you will be able to get the best of this service when you integrate it on your online platforms. Why not get started right away with our Voice OTP API integration. 

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