In this post, I will explore how one could build a web based form that can handle any of the above cases. Some payment systems, banks or credit card issuers, use SMS OTP to provide an extra layer of security before processing payments. Sending an email message or a text message are very common account recovery methods. Pretty much every online business that provides users with some form of authentication will need a way to allow them to recover a lost password. In such services, it makes total sense to use SMS OTP to verify a phone number. Some services make use of a phone number as the primary identifier of an account. Phone numbers can be recycled or highjacked and the whole OTP concept is also not immune to phishing attacks. Although SMS could be considered for this scenario, be aware that is not the most secure method of authentication. A few examples for these types of user experiences include: Two-factor authenticationīesides providing a username and password, more and more websites also require a OTP to confirm the identity of a user before starting a session. It's a very common practice to use SMS to provide users with a one time password (OTP) for a variety of scenarios.
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