Data security and fraud protection are two of the most important elements in payments. Card brands, banks, consumers and businesses all concern themselves with preventing crime and ensuring that cardholders are the only ones who can actually use their cards for every transaction.
Cardholder verification methods are often forgotten in this conversation. Where merchants wonder whether their POS is adequately secure and consumers hope they haven't leaked any private information, CVMs add one last barrier to keep fraudsters at bay.
Not all CVMs are equal; some aren't as effective as others. Signatures, PINs and biometrics are among the most common, so examining them would provide clarity into how well payment data is protected.