EMV® Three-Domain Secure (3-D Secure, or 3DS) is a messaging protocol that enables consumers to authenticate themselves with their card issuer when making card-not-present (CNP) e-commerce purchases. The additional security layer helps prevent unauthorized CNP transactions and protects the merchant from exposure to CNP fraud. The three domains consist of the merchant/acquirer domain, issuer domain, and the interoperability domain (for example, Payment Systems).
3DS Assessors are able to assess a service provider providing 3DS services against the PCI 3DS Core Security Standard. The PCI 3DS Core Security Standard applies to entities that perform or provide the following functions, as defined in the EMVCo 3DS Core Specification:
• 3DS Server (3DSS)
• 3DS Directory Server (DS)
• 3DS Access Control Server (ACS)
Third-party service providers that can impact these 3DS functions, or the security of the environments where these functions are performed, may also be required to meet PCI 3DS requirements as applicable to the provided service. Whether an entity is required to validate compliance with the PCI 3DS Core Security Standard is defined by the individual payment brand compliance programs.