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Authentication Identifier
The identifier (e.g., XID or DSTransactionID) assigned by the authentication system for tracking and verification.
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Authentication Response
The result of the authentication process.
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Authentication Value
The cryptographic token (CAVV/AAV) generated during the authentication process to validate the cardholder's identity.
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Electronic Commerce Indicator (ECI)
The Electronic Commerce Indicator (ECI) represents the authentication level and indicates liability shift during online or card-not-present transactions.
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Version
The version of the authentication protocol (e.g., 3D Secure 1.0 or 2.0) used for the transaction.