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2 April 2025·1 min readInteroperabilityPaymentsIdentity

Interoperability as a Public Good

Notes on aligning national payment and identity rails with international standards without surrendering sovereignty.

Interoperability is often described as a technical property of systems. It is more useful to treat it as a public good — something deliberately produced, maintained, and defended by institutions.

The standards that matter

In our advisory work with central banks and regulators, four families of standards recur:

  • ISO 20022 for payment message structure and instructed-party data.
  • OpenID Connect and OAuth 2.x for federated authentication flows.
  • W3C Verifiable Credentials for portable, cryptographically verifiable claims.
  • FAPI profiles for high-assurance financial APIs.

None of these are silver bullets. Each requires national-level profiling: which optional fields become mandatory, how identifiers are scoped, how revocation is handled.

Sovereignty is not isolation

A common misunderstanding is that aligning with international standards weakens sovereignty. The opposite is true. Standards alignment lowers the cost of bilateral arrangements, makes domestic systems auditable by independent parties, and keeps the option of supplier substitution open.

Sovereignty, in this context, is the ability to change one's mind without rebuilding the stack.

Written by Jengacore Editorial.

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