Smart Password Manager v4.0.0
Secure, offline smart password manager for Android with deterministic password generation
Store only metadata — passwords never exist until you generate them.
Decentralized by Design: Unlike traditional password managers that store encrypted vaults on central servers, Smart Password Manager stores nothing. Your secrets never leave your device. Passwords are regenerated on-demand — no cloud, no database, no trust required.
- Zero-Storage Security — no passwords or secret phrases are ever stored or transmitted
- Decentralized Architecture — no central servers, no cloud dependency
- Deterministic Regeneration — passwords are recreated identically from your secret phrase
- Metadata Only — store only descriptions and verification keys
- On-Device Generation — all cryptographic operations happen locally on your Android device
- On-Demand Discovery — passwords exist only when you generate them
- Decentralized & Serverless — no central database, no cloud lock-in
- Smart Password Generation — deterministic from secret phrase + length
- Offline-First — works completely without internet connection
- Cross-Platform Compatible — same passwords as all other SmartPassLib implementations
- Public Key Verification — verify secret knowledge without exposing the secret
- Material Design UI — clean, intuitive interface with dark theme support
- Instant Search — quickly find passwords by description as you type
- Drag & Drop Reordering — customize password order
- QR Code Import — scan QR codes to import passwords from other devices
- Export/Import — backup and restore your password metadata
- Onboarding Guide — step-by-step introduction for new users
How It Works
| Step | Operation | Location | Stored? |
|---|---|---|---|
| 1 | Enter secret phrase | Your mind | ❌ Never |
| 2 | Generate private key (15-30 iter) | RAM only | ❌ Never |
| 3 | Generate public key (45-60 iter) | Device | ✅ Stored |
| 4 | Generate password from private key | RAM only | ❌ Never |
Key Derivation
| Key Type | Iterations | Purpose | Stored? |
|---|---|---|---|
| Private Key | 15-30 (dynamic) | Password generation | ❌ Never |
| Public Key | 45-60 (dynamic) | Secret verification | ✅ Yes |
Validation Rules: Secret phrase: min 12 chars · Password length: 12-100 chars
Main Screen
- Password Cards — list of all your smart password entries
- Description — your custom label for each entry
- Length — shows password length in symbols
- Public Key Preview — first 12 chars of verification key
Toolbar Buttons
- 🔍 Search — open search bar to filter passwords
- ⋮ (Menu) — open menu with Add, QR Scan, Export, Import, Help, About
Entry Card Buttons
- 👁️ Eye — generate and display smart password (requires secret)
- ✏️ Edit — change description or length (secret cannot change)
- 🗑️ Delete — remove entry permanently
Powered by smartpasslib-kotlin v4.0.0+
Cryptographic Specifications (v4.0.0):
| Hash Algorithm | SHA-256 |
| Private Key Iterations | 15-30 (dynamic, per secret) |
| Public Key Iterations | 45-60 (dynamic, per secret) |
| Key Derivation Salt | "private"/"public" |
| Password Generation | Deterministic from private key |
| Min Secret Length | 12 characters |
| Password Length Range | 12-100 characters |
- Language: Kotlin
- Platform: Android 8.0+
- Core Library: smartpasslib-kotlin
- UI: Material Design
- License: BSD 3-Clause
Core Libraries:
- smartpasslib — Python
- smartpasslib-js — JavaScript
- smartpasslib-kotlin — Kotlin
- smartpasslib-go — Go
- smartpasslib-csharp — C#
Other Apps:
- CAMERA — QR code scanning
- MANAGE_EXTERNAL_STORAGE (Android 11+) — Saving backups to Documents folder
- WRITE_EXTERNAL_STORAGE (Android 10-) — Export/Import functionality
The app works completely offline and never transmits data.
