Case study · 09/10
Alibi
A private photo and video vault, encrypted on the phone, behind a working calculator.
- Category
- Mobile apps
- Year
- 2026
- Status
- Google Play · closed testing
- Languages
- EN · FR · AR
01
Overview
An offline encrypted vault with no account, no cloud and no server. An optional working calculator disguises the app; the right PIN followed by “=” opens the vault.
02
Our solution
Media are encrypted with AES-256-GCM, the PIN and recovery code are stretched with Argon2id, and keys are wrapped by the Android Keystore. A written threat model drives every security decision.
03
Key features
- 01
Calculator disguise and alternate icons
- 02
Encrypted albums and camera
- 03
Biometric unlock
- 04
Recovery code
- 05
Encrypted backup
04
Engineering highlights
- 01AES-256-GCM + Argon2id + Android Keystore
- 02Screenshots blocked, cloud backup disabled
- 0358 cryptography tests
05
Technology
- Flutter
- Dart
- SQLCipher
- Kotlin
- Android Keystore
06
Screens
Scroll sideways or use the arrow keys to see every screen.
07
Availability
In closed testing on Google Play — public release coming soon.
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