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We've seen how to build a conference line and then protect it with a static passcode. However, passcodes can be guessed or leaked, especially if they are reused over time. An alternative is to make a list of numbers that are permitted to join the call. But, since spoofing phone numbers is relatively easy, this still may not protect you.
A one-time passcode (OTP) sent to a caller's phone or email, can verify they are who they say they are and increase the security of your conference line once more.
In this post we will take the Rails application we previously developed and add a conference line secured in two ways. We will:
In order to code along with this tutorial you will need:
A Twilio account (if you don't have one yet, sign up for a new Twilio account here and receive $10 credit when you upgrade)
A Twilio phone number that can receive incoming calls
Once you've got all that, we can get started.
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