# Lockey

> Lockey is a local desktop file and folder encryption application for Windows, macOS, and Linux developed by ENTEROPIA LLP. It password-protects files and folders using authenticated AES-256-GCM encryption with local vaults and zero cloud storage.

## Core Information
- **Product Name**: Lockey
- **Tagline**: Your Files. Your Key.
- **Developer / Publisher**: ENTEROPIA LLP (https://enteropia.com)
- **Official Website**: https://lockey.in/
- **License / Cost**: Free desktop download
- **Supported Platforms**: Windows 10 & 11 (64-bit x64), Linux Debian/Ubuntu (amd64), macOS 12+ (Universal, upcoming)
- **Primary Use Case**: Password-protecting and encrypting sensitive files, documents, and folders on local computers without uploading to cloud drives.

## Key Features & Security Model
- **AES-256-GCM Encryption**: Strong mode packages files and folders into an authenticated `.lockey` container.
- **Argon2id Key Derivation**: Master password and item passwords are salted and hashed using memory-hard Argon2id.
- **Operating System Keyring Pepper**: Secret-store integration (Windows Credential Manager / macOS Keychain) mixes an OS-level pepper into authentication verifiers.
- **Per-Item Passwords**: Each protected file or folder has an independent item password; opening a copied `.lockey` package requires the original item key, even on another computer.
- **Zero Cloud / Zero Telemetry**: 100% offline. No user accounts, no cloud sync, no server uploads, and no analytics collecting vault secrets.
- **Two Protection Modes**:
  - `Strong`: Full AES-256-GCM encrypted package (`.lockey`).
  - `Light`: Fast local OS permission lock (removes read permissions).

## Documentation & Links
- [Complete Product Guide & Security Architecture](https://lockey.in/llms-full.txt): Comprehensive technical specifications, cryptography breakdown, and FAQ.
- [Downloads & Releases](https://lockey.in/#download): Windows 64-bit installer (`.exe`) and Linux Debian package (`.deb`).
- [Privacy Policy](https://lockey.in/privacy/): Complete privacy policy documenting local data handling and zero-telemetry guarantee.