The security controls in the industry start with the credit/debit cards you accept at your point of sale (POS). Over the years, these security features have evolved to include the 3 or 4 digit security code, last 4 digit verification, masking the cardholder's personal account number (PAN) so only the last 4 digits print on the back of the card, and other security features such as embedded chips and PINs.
This image below shows some of the more popular security features of cards you accept at your business every day.