Case Study

Mobile

Secure Auth Vault

A privacy-focused, cross-platform credential manager and authenticator application designed to securely store sensitive data. The app serves as a centralized, offline-first vault for managing diverse credential types—such as login credentials, banking details, Wi-Fi passwords, and API keys—alongside sensitive documents. It features client-side encryption for secure cloud backups to Google Drive, an integrated Time-Based One-Time Password (TOTP) authenticator engine, and biometric hardware authentication to ensure zero-knowledge local security.

Flutter Framework

Challenges & solutions

The technical problems our team solved to ship a reliable, unified mobile experience.

Protecting Sensitive User Data with Zero-Knowledge Security

Storing passwords, banking information, and private documents required a security model that never exposed user data. We implemented client-side encryption with a zero-knowledge architecture, ensuring only users can decrypt and access their information.

Providing Secure Backup Without Compromising Privacy

Users needed reliable cloud backups without trusting third-party services with their sensitive data. We encrypted all vault data before synchronizing it to Google Drive, enabling secure backup and seamless restoration across devices.

Combining Password Management and Two-Factor Authentication

Managing credentials and authentication codes across multiple apps created unnecessary complexity. We integrated a built-in TOTP authenticator that generates time-based verification codes alongside securely stored credentials.

Strengthening Access Security Without Reducing Convenience

Traditional master passwords alone can reduce usability while still remaining vulnerable if compromised. We integrated biometric authentication using fingerprint and Face ID support to provide fast, secure, and hardware-backed access.

Keeping Sensitive Data Accessible Without Internet Dependency

Users needed uninterrupted access to critical credentials even when offline or travelling. We designed an offline-first encrypted vault with secure local storage, allowing instant access while maintaining complete data privacy.

Key features

What users get in the finished, shipped product.

Multi-Purpose Credential Vault :

Templates : Dedicated structures to securely add and organize distinct credential categories.
Coverage : Handles everyday web logins, sensitive bank accounts, Wi-Fi network passwords, and developer API keys.
Utility : Consolidates fragmented sensitive accounts into a singular, structured database.

Encrypted Document Storage :

Security : Safely stores critical files, private IDs, and personal documents.
Isolation : Sandboxes assets directly within the application’s secure storage container.
Protection : Keeps high-stakes media and text files shielded from unauthorized system access.

Zero-Knowledge Drive Sync and Restore :

Backup : Syncs all database rows and media files to Google Drive in a heavily encrypted format.
Privacy : Uses a zero-knowledge approach, ensuring only the owner holds the decryption capability.
Recovery : Allows users to restore their complete secure ecosystem seamlessly across new devices.

Integrated 2FA Authenticator :

Engine : Built-in Time-Based One-Time Password (TOTP) generation utility.
Automation : Automatically calculates and refreshes temporary 2FA security tokens every 30 seconds.
Convenience : Eliminates the need for standalone secondary authenticator apps by unifying logins and tokens.

Biometric Device Security :

Hardware : Integrates natively with device-level security chips for robust application locking.
Flexibility : Supports fingerprint recognition (Touch ID / Android Biometric) and facial scanning (Face ID).
Speed : Delivers instantaneous verification, granting rapid access without manual master key typing.

Encrypted Local Data Export :

Control : Allows users to compile and extract a local file copy of their entire database.
Safety : Applies cryptographic encryption to the exported file to prevent data leaks.
Offline : Provides a reliable method for managing manual, off-grid backup histories.

Premium Dynamic UI/UX :

Aesthetics : Modern, highly fluid user interface built for fast performance.
Adaptability : Features a system-matching Light and Dark mode toggle for visual customization.
Comfort : Optimizes readability and layout responsiveness across varied screen sizes.

Tech integrations

Third-party SDKs & libraries

20 core integrations powered

get

Core system integration

local_auth

Core system integration

flutter_secure_storage

Core system integration

sqflite

Core system integration

path

Core system integration

encrypt

Core system integration

crypto

Core system integration

path_provider

Core system integration

file_picker

Core system integration

image_picker

Core system integration

google_sign_in

Core system integration

googleapis

Core system integration

http

HTTP client & interceptors

permission_handler

Device permissions & guards

intl

Core system integration

uuid

Core system integration

shared_preferences

Core system integration

firebase_core

Core system integration

otp

Core system integration

mobile_scanner

Core system integration

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