A: Samsung Pay uses Tokenization, a Secure Environment, and Samsung KNOX to secure your payment information. Additionally, you verify either using your fingerprint or a 4-digit PIN when making purchases.
Tokenization is a method of replacing your sensitive payment card information (Card Number, Expiration Date, Security code, etc.) with a device-specific ‘Token’ which acts as a surrogate value. In mobile payments, Tokens are used to protect your payment information and to help reduce the security risks inherent to plastic cards.
A Secure Environment is a physically segregated chip in the phone which only allows access to highly sensitive operations/information such as fingerprint and payment information. Normal applications and malware have no access to the information in a Secure Environment.
Samsung KNOX runs scans to see if your device is secure. Samsung KNOX can permanently disable Samsung Pay on a compromised device in order to help protect your payment information.