3DS ReferenceProtocol & field guide

EMV 3-D Secure · Core specification 2.3.1.1

ACS Challenge Mandated IndicatoracsChallengeMandated

ACS Challenge Mandated Indicator in Authentication Response (ARes).

Source edition: Core 2.3.1.1 · Type: String · Length: 1 character · Minimum length: 1 · Maximum length: 1

Baseline in ARes Conditional

Conditional. Same classification across the remaining channels and categories. Required if Transaction Status = C or D. Usage and conditions ↓

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Valid values

CodeMeaning
YChallenge is mandated
NChallenge is not mandated

Source: EMV_3DS_CoreSpec_v2.3.1.1_20230530.pdf, Table A.1, PDF pages 201. Read usage and conditions.

Usage in ARes

Indication of whether a challenge is required for the transaction to be authorised due to local/regional mandates or other variable.

Conditional inclusion — source text

Required if Transaction Status = C or D.

Related condition fields: transStatus.

Format and scope

Type: String · Length: 1 character · Minimum length: 1 · Maximum length: 1

Source components: ACS. Channels: 01-APP, 02-BRW, 03-3RI. Categories: 01-PA, 02-NPA.

EMV_3DS_CoreSpec_v2.3.1.1_20230530.pdf, Table A.1, PDF pages 201

Transaction context

This reference covers the published source edition. Use the explorer to inspect this field and any applicable transaction conditions. Scheme programme requirements are not inferred from the protocol edition.

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Sources and related references

EMV_3DS_CoreSpec_v2.3.1.1_20230530.pdf, Table A.1, PDF pages 201

Source review status: carried-forward. Carried-forward material has not acquired a new verification claim.

Document fingerprint (SHA-256): 6fdf0aba3fc1a765f96b74dad4069d1e189969f38f0023647021687daf589d6b