Knowledge

Practical notes from building and operating systems

Structured technical and operational writing about architecture, integrations, banking systems, SaaS, operations and knowledge transfer.

Knowledge Hub

Practical engineering notes

Banking & FinTech Systems

Digital Banking Security: OTP, Devices, Sessions and Authorization

Digital-banking security is stronger when authentication, device trust, session management, transaction authorization, and backend entitlement checks are separate controls. If one token proves everything forever, compromise of that token becomes compromise of…

Read article