Framework overlap

Does ISO/SAE 21434 cover Singapore Cybersecurity Act 2018?

You hold ISO/SAE 21434 and have been told to do Singapore Cybersecurity Act 2018. Here is how much overlaps, control by control.

20% of Singapore Cybersecurity Act 2018 you already have

ISO/SAE 21434 already covers about 20% of Singapore Cybersecurity Act 2018, leaving 4 of 5 controls as genuinely new work.

Already covered 0 Likely covered 1 New work 4

No control in ISO/SAE 21434 maps directly to one in Singapore Cybersecurity Act 2018. 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 ISO/SAE 21434 reaches these. This is the list to scope.

SGCYBER-2
Codes of Practice, Standards, Audits
SGCYBER-3
Cyber Incident Reporting
SGCYBER-4
Licensing of Cybersecurity Services
SGCYBER-5
Investigation, Enforcement, Cooperation
Show the 1 you already have
SGCYBER-1
Critical Information Infrastructure (CII) Designation and Registration

How this is calculated

Already covered means a mapping runs from a control in ISO/SAE 21434 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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