Traditionally when a card or mobile payment is made, the card number passes through various points in the authorization process. This increases the risk of fraud because this data can be intercepted at multiple points. To counter this, an increasing amount of payment card issuers use a technology called tokenization. This stores the original number in a secure token vault, and substitutes it with a unique tokenized number. Because of the limited validity, this number is useless when intercepted.
To learn more about tokenization and how Rambus is securing mobile payments, click here.