3DS ReferenceProtocol & field guide

EMV 3-D Secure · Core specification 2.3.1.1

ACS Ephemeral Public Key (QT)acsEphemPubKey

ACS Ephemeral Public Key (QT) in Authentication Response (ARes).

Source edition: Core 2.3.1.1 · Type: Object · Length: Variable, maximum 256 characters · Maximum length: 256

Nested baseline in ARes Conditional

Cannot determine yet. Some contexts lack a reviewed inclusion answer. Select a channel and category to inspect the applicable evidence. Usage and conditions ↓

Explore in context →

Usage in ARes

Contained member of acsSignedContent. Nested presence requirements apply when the parent is supplied; this is not a separate top-level message field.

Public key component of the ephemeral key pair generated by the ACS and used to establish session keys between the 3DS SDK and the ACS. See Section 6.2.3.2 for additional detail.

Conditional inclusion — source text

See ACS Signed Content.

Format and scope

Type: Object · Length: Variable, maximum 256 characters · Maximum length: 256

Source components: ACS. Channels: 01-APP. Categories: 01-PA, 02-NPA.

EMV_3DS_CoreSpec_v2.3.1.1_20230530.pdf, Table A.1, PDF pages 202

Related FAQ notes

  • Conveyed within the acsSignedContent JWS object rather than as a top-level message field. See Section 6.2.3.2.

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.

Explore in context →

Sources and related references

EMV_3DS_CoreSpec_v2.3.1.1_20230530.pdf, Table A.1, PDF pages 202

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

Document fingerprint (SHA-256): 6fdf0aba3fc1a765f96b74dad4069d1e189969f38f0023647021687daf589d6b