Secure Banking System Integration: How to Maintain Control Without Compromise 

core banking integration security and compliance

Can you achieve a truly secure banking system integration without duplicating user credentials or compromising on control?

Our recent integration project delivers a definitive “yes.”
We designed a secure banking system integration (1) that delegated 100% authentication and authorization to the institution’s existing systems, proving that security and flexibility are not mutually exclusive.

The Foundation: External Token Validation 
The cornerstone of this was trusting the institution’s authentication system. We configured to accept tokens issued by their external identity provider.

Here’s how we ensured a secure banking system integration (2):

  • Real-Time Validation: For every request, Fimple’s integration layer validated the token in real-time against the client’s security service. 
  • Dynamic Permissions: Subsequently, the system fetched user roles and permissions on-demand for enabling precise access control. 
  • Zero Credential Storage: Critically, Fimple never stored or replicated user credentials to eliminate a major security risk vector.

The Impact: Unbreachable Security, Uninterrupted Workflow

This model for secure banking system integration meant users experienced a seamless, single sign-on journey. They logged into their familiar portal and accessed Fimple’s powerful modules as a native extension. Behind the scenes, however, we never compromised security. The institution maintained full control over access policies, while our core services operated with complete confidence in the authenticated user’s identity.

In our final post, we will reveal how this entire integration was delivered without a single custom code change, ensuring long-term scalability and easy upgrades. Ready to future-proof your own systems?

👉 Request a demo to see how our composable platform can transform your operations
. 

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Author Box

Yalçın Arı

Head of QA and Release Management

It’s time to change with Fimple.

Cloud-native composable core banking system for financial institutions with the “Financial Function as a Service” principle.

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