Sandbox Protocol_Active

DayVault / BATCH_009

Protocol_Brief

Challenge

Most journal apps store data in the cloud. I wanted to build one that keeps everything encrypted on-device.

Solution

An offline-first vault using PBKDF2 for key derivation and local biometric hardware for access.

“I wanted a private place for my thoughts that felt truly secure. DayVault was my project for learning about mobile security—implementing AES-256 encryption and biometric locks. It taught me how to handle sensitive data locally using ObjectBox and build a glassmorphic UI that feels premium yet private.”

Learned to implement biometric and PIN-based security with lockout protection.
Explored secure local storage using ObjectBox and AES encryption for entries.
Designed a glassmorphic UI to give the 'Vault' a modern, high-end feel.
Built a calendar-based recall system for easy navigation of past memories.

Key_Modules

SecurityJournalIdentity

Loadout_Specs

FlutterDartRiverpodObjectBoxAES-256 / PBKDF2Local Auth

Sys_Diagnostics

Node_Count:4

Fidelity:Mobile Security Patterns

Matrix_State:STABLE

dayvault-memory-palace.ais-cloud.dev

Viewport: Matrix_Simulated

Step 01

Unlock Vault

Test the security flow—I built this with biometric fallback and PIN protection.