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This is supposed to be contrasted with an operator asking for the credit card digits manually, leaving room for them to scribble down the card number.

The DTMF system is so that the computer receives the card number directly. Of course that could be done with speech recognition as well.

And in any case, as others have pointed out, a phone connection is not a secured line.

But then again, a credit card fraud incident isn't the end of the world either. So maybe the risk is acceptable.




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