3DS ReferenceProtocol & field guide

EMV 3-D Secure · Core specification 2.3.1.1

Challenge Additional CodechallengeAddCode

Challenge Additional Code in Challenge Request (CReq).

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

Baseline in CReq Conditional

Varies by context. Requirement or applicability varies by channel or message category. Select a specific context to resolve it. Usage and conditions ↓

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Valid values

CodeMeaning
YAdditional choice selected

Source: EMV_3DS_CoreSpec_v2.3.1.1_20230530.pdf, Table A.1, PDF pages 231. Read usage and conditions.

Usage in CReq

Indicates to the ACS that the Cardholder selected the additional choice. Note: If present, this field contains the value Y.

Conditional inclusion — source text

Required for Native UI: • if the Challenge Additional Label was present in the CRes message AND • if the Challenge Additional choice is selected.

Format and scope

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

Source components: 3DS SDK. Channels: 01-APP. Categories: 01-PA, 02-NPA.

EMV_3DS_CoreSpec_v2.3.1.1_20230530.pdf, Table A.1, PDF pages 231

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 231

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

Document fingerprint (SHA-256): 6fdf0aba3fc1a765f96b74dad4069d1e189969f38f0023647021687daf589d6b