Framework overlap

Does ACSC Essential Eight cover Open Banking Security?

You hold ACSC Essential Eight and have been told to do Open Banking Security. Here is how much overlaps, control by control.

50% of Open Banking Security you already have

ACSC Essential Eight already covers about 50% of Open Banking Security, leaving 4 of 8 controls as genuinely new work.

Already covered 0 Likely covered 4 New work 4

No control in ACSC Essential Eight maps directly to one in Open Banking Security. Everything counted as covered is covered because both map to the same third standard, which is what a crosswalk is, but it is an inference rather than a lookup.

What is genuinely new work

Nothing in ACSC Essential Eight reaches these. This is the list to scope.

OPENBANK-1
FAPI 2.0 Security Profile and OpenID Foundation Conformance
OPENBANK-5
Data Minimisation, Scope Enforcement, Localisation, Cross-Border Transfers
OPENBANK-6
Fraud Detection, Transaction Risk Analysis, Rate Limiting, Sandbox
OPENBANK-7
Logging, Monitoring, Regulatory Reporting, SLA, Availability
Show the 4 you already have
OPENBANK-2
Strong Customer Authentication (SCA), Consent Lifecycle, and Customer UX
OPENBANK-3
Mutual TLS, Token Binding, Request Signing (JWS), Key Management
OPENBANK-4
Third Party Provider (TPP) Onboarding, Directory Integration, Due Diligence
OPENBANK-8
Incident Detection, Response, Customer Notification, Post-Incident Review, BCM

How this is calculated

Already covered means a mapping runs from a control in ACSC Essential Eight to that control. Likely covered means no direct mapping exists but both frameworks map to the same control in a third standard. New work means neither. We keep those separate rather than adding them into one friendlier number, because blending them would present a two-hop inference as a verified fact.

Coverage is not symmetric. Run it the other way and you will get a different number; both are correct.

From 332,959 cross-framework control mappings across 723 frameworks, 531 of them verified against their source documents. It does not tell you that you are compliant: a mapped control means the two standards ask for the same thing, not that you have done it.

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