This standard defines the logical and physical requirements, as well as the evaluation procedures for those entities that provide or execute the following functions, established in the EMV®3-D Secure Protocol and Core Functions Specification document:
• 3DS Server (3DSS): provides the functional interface between the environment from which the 3DS functionality is requested and the directory server (DS).
• 3DS Directory Server (DS): manages the list of card ranges for which authentication is available and coordinates communication between the 3DS server (3DSS) and the access control server (ACS) to determine which authentication is available for a particular card number and device type.
• 3DS Access Control Server (ACS): the ACS contains the authentication rules and is controlled by the issuer. It checks what type of authentication is available and authenticates the specific transaction.