Case Study: giovium Password Manager

A cross-platform, privacy-first, self-hosted, offline-first password manager built with security and speed in mind.

Overview

giovium is a completely free, self-hosted, offline-first password manager available on iOS, Android, macOS, Windows, and Linux. It was created to address a critical gap in the ecosystem: to give users complete control over their sensitive credentials without mandatory cloud accounts, advertising, or predatory paywalls.

Its architecture relies on industry-grade security standards and modern cryptographic primitives, ensuring a zero-knowledge paradigm where your data remains purely yours and keys never leave your device.

Platforms iOS, Android, macOS, Windows, Linux

Tech Stack React Native, Expo, Electron, Node.js

Cryptography Ed25519, X25519, XChaCha20-Poly1305

Sync Method Self-Hosted Server (Docker, Node)

Key Capabilities & Features

Zero-Knowledge Encryption: Your vault is locked using Argon2 password derivation with extreme memory hardness, making quantum parallelization physically difficult and prohibitively expensive. Data is encrypted using 256-bit XChaCha20-Poly1305 on your local device. The synchronization server only stores blobs of ciphertext and has no mathematical way to access your master password or credentials.
Offline-First & Free Syncing: Store everything locally on your disk. Synchronize across devices on your own terms using a self-hosted backend (deployable via Docker, Linux, macOS, or Windows binaries), bypassing third-party cloud servers.
Integrated Authenticator: Natively store and generate Time-based One-Time Passwords (TOTP/2FA) directly inside the app, removing the need for a separate authenticator app. Set up easily via manual entry or automatic QR code scanning.
Biometric Integration & Anti-Espionage: Integrates with hardware-backed security modules (e.g. Secure Enclave) for safe biometric-enabled unlock. Includes active shields preventing screenshots, screen recordings, and switcher background exposure.
Append-Only Versioning & Conflict Resolution: Operates on an immutable data structure where modifications are appended, allowing users to restore previous versions of credentials. Includes smart conflict resolution protocols that permanently prevent data duplication.
No Cloud Registrations: Start using the app immediately. There are no registration forms, email validation steps, or telephone validations required to run the vault. Complete data ownership.

Visit giovium.com