3DS ReferenceProtocol & field guide

EMV 3-D Secure · Core specification 2.3.1.1

DS URLdsURL

URL of the DS to which the ACS will send the RReq if a challenge occurs. The ACS is responsible for storing this value for later use in the transaction for sending the RReq to the DS.

Read in message: AReq

Explore this field with transaction context

Message inclusion

Baseline inclusion. Effective requirements depend on transaction context. Check the field’s conditions and FAQ qualifications; select channel and category in the explorer.

MessageBaseline inclusion
AReqConditional

Conditional inclusion — source text

Required between the DS and the ACS, but will not be present from the 3DS Server to the DS.

Format and scope

Type: String · Length: Variable, maximum 2048 · Maximum length: 2048

Source components
DS
Device channels
01-APP, 02-BRW, 03-3RI
Message categories
01-PA, 02-NPA

Version history

No field introduction version is tagged in the dataset. Introduction tags are curated metadata, not a full history of changes. Compare versions and understand coverage.

Source and review status

EMV_3DS_CoreSpec_v2.3.1.1_20230530.pdf, Table A.1, PDF pages 250

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

Source document fingerprint

EMV_3DS_CoreSpec_v2.3.1.1_20230530.pdf

6fdf0aba3fc1a765f96b74dad4069d1e189969f38f0023647021687daf589d6b

Official EMVCo specifications · Methodology and coverage limits