3DS ReferenceProtocol & field guide

EMV 3-D Secure · Core specification 2.3.1.1

Authentication MethodauthenticationMethod

Indicates the list of authentication types the Issuer will use to challenge the Cardholder, when in the ARes message or what was used by the ACS when in the RReq message. Note: For 03-3RI, only present for Decoupled Authentication.

Explore this field with transaction context

Allowed and reserved values

ValueMeaningIntroduction tag
01Static PasscodeNot tagged
02SMS OTPNot tagged
03Key fob or EMV card reader OTPNot tagged
04App OTPNot tagged
05OTP OtherNot tagged
06KBANot tagged
07OOB BiometricsNot tagged
08OOB LoginNot tagged
09OOB OtherNot tagged
10OtherNot tagged
11Push Confirmation2.2.0
12Decoupled2.3.1.1
13WebAuthn2.3.1.1
14SPC2.3.1.1
15Behavioural biometrics2.3.1.1
16Electronic ID2.3.1.1
17–79Reserved for EMVCo future use (values invalid until defined by EMVCo)Reserved
80–99Reserved for DS use If SDK Type = 02 and Split-SDK Type/Limited Indicator = Y, a value of 01 or 06 is not valid.Reserved

Introduction tags are shown where recorded. An absent tag does not establish when a value was introduced.

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
AResConditional
RReqConditional

Conditional inclusion — source text

• Required in the ARes message if Transaction Status = C or D. • Required in the RReq message if Transaction Status = Y or N.

Related condition fields: transStatus.

Format and scope

Type: Array

Source components
ACS
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 208, 209

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