Requirement 4.1

Use strong cryptography and security protocols such as SSL/TLS or IPSEC to safeguard sensitive cardholder data during transmission over open, public networks.
Examples of open, public networks that are in scope of the PCI DSS are:

  • The Internet,
  • Wireless technologies,
  • Global System for Mobile communications (GSM), and
  • General Packet Radio Service (GPRS).