3DS ReferenceProtocol & field guide

EMV 3-D Secure · Core specification 2.3.1.1

Message CategorymessageCategory

Message Category in Authentication Request (AReq).

Source edition: Core 2.3.1.1 · Type: String · Length: 2 characters · Minimum length: 2 · Maximum length: 2

Baseline in AReq Required

Required across all channels and categories. Usage and conditions ↓

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Field value definitions

Field-wide definitions. Check message-specific restrictions in usage and conditions.

CodeMeaning
01PA
02NPA

Source: EMV_3DS_CoreSpec_v2.3.1.1_20230530.pdf, Table A.1, PDF pages 258. Read usage and conditions.

Reserved values

CodeMeaning
03–79Reserved for EMVCo future use (values invalid until defined by EMVCo)
80–99Reserved for DS use

Usage in AReq

Identifies the category of the message for a specific use case.

Format and scope

Type: String · Length: 2 characters · Minimum length: 2 · Maximum length: 2

Source components: 3DS Server. 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 258

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 258

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

Document fingerprint (SHA-256): 6fdf0aba3fc1a765f96b74dad4069d1e189969f38f0023647021687daf589d6b