flutter-client-side-encryption

What problem does it solve?

This Skill protects locally stored Flutter data from plain-text exposure by adding client-side encryption for offline caches and shared preferences, helping apps meet privacy and data-protection expectations for sensitive user information.

Core Features & Use Cases

• AES-256-CBC Encryption: Encrypt and decrypt cached strings and JSON payloads with a strong symmetric cipher.
• Per-Installation Key Generation: Create a random 256-bit key once, store it locally, and reuse it for subsequent app sessions.
• Fresh IV Per Encryption: Generate a new random initialization vector for every encryption operation to avoid pattern leakage.
• Legacy Compatibility: Read older plaintext cache entries safely while migrating to encrypted storage.
• Use Case: Secure food logs, shopping lists, meal plans, and other offline PII stored in SharedPreferences or similar local stores.

Quick Start

Ask for a Flutter implementation that encrypts local SharedPreferences caches with AES-256-CBC, generates and stores a per-installation key, uses a new IV for every write, and preserves backward compatibility for existing plaintext data.