Privacy-first mind mapping app. Part 3: Encryption Model - The Heart

This article describes the encryption model behind MindMapVault — not as a feature list, but as an engineering constraint that shapes every other decision in the system. It assumes familiarity with basic encryption concepts and focuses on boundary decisions, not cryptographic primers. MindMapVault is not mainly a drawing tool. It is an encryption discipline wrapped in a usable interface. If this model fails, no amount of UI, performance, or feature depth can compensate. Everything else becomes i