Fraud and the fear of fraud erode trust in the payments system.  For that reason, Visa together with its members invests heavily in technology and expertise to combat ever more sophisticated attempts to breach the system. 
 
Visa evaluates technologies and establishes standards designed to secure transactions at all levels – from the moment the card is presented, to the transfer and storage of transaction data, all the way to settlement.
 
3-Digit Security Code
Proof that your card is in the right hands.   How does it work?