BATCH_01 // #09

DayVault

Exploring Security & Privacy in Flutter

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.

Project Highlights

[+]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.

Tech Stack

#Flutter#Dart#Riverpod#ObjectBox#AES-256 / PBKDF2#Local Auth

Open Source Repository

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.

Memory Palace

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