Transaction Authentication
Transaction Authentication is the verification of identity specifically tied to a sensitive or high-risk action rather than only to the initial session login.
- Synonym
- Transaction Signing
Definition
Transaction Authentication is an authentication pattern in which the user must provide additional or context-specific proof of identity before completing a sensitive operation such as approving a payment, changing beneficiary information, exporting critical data, modifying privileged settings, or executing an administrative action. It differs from basic session authentication because it binds assurance to a specific action, often taking into account transaction amount, target, risk, and business criticality. In strong implementations, transaction authentication also binds the authentication event to the transaction content itself to reduce the risk of session hijacking, replay, or unauthorized transaction substitution.
Why it matters
Authenticating the session is not always enough; some actions require stronger assurance precisely at the point of execution.
The Ariovis perspective
Context improves an access decision only when the signals are reliable, understood and governed. Adding more signals does not automatically produce a better policy.
Related services
Common pitfalls
- A common mistake is relying on a prior login alone for high-impact operations without requiring transaction-specific verification.
Standards and protocols
- PSD2/SCA
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