PillowLock

Layered file protection for desktop.

Protect files into .plock files and restore them later with the right password.

English | 한국어 | Contributing | Security

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About

PillowLock is a desktop app for protecting and restoring files with a clean Windows UI built in Rust.

It supports password-based protection, an optional extra key file, multiple security profiles, batch queue workflows, and Windows release packaging.

This is my first project written in Rust. I built it because I needed it myself, so some parts of the code may still look rough, messy, or unusual. Please keep that in mind when reading the codebase.

If you find a bug, notice a problem, or want a feature, please open an issue or send a pull request.

Highlights

• Protect a regular file into a .plock file
• Restore a .plock file back into a normal file
• AES-256-GCM authenticated encryption
• Argon2id-based password key derivation
• Optional key file support
• Balanced and Hardened protection profiles
• Batch queue for multiple files
• English-first UI with Korean support
• In-app update support for release builds

Tech Stack

• Rust 2021
• Slint
• AES-GCM
• Argon2id
• HKDF / SHA-512
• Zeroize

Build

cargo build --release

Run in development:

cargo run

Run tests:

cargo test

Windows release binary:

target\release\pillowlock.exe

Disclaimer

• PillowLock is provided as-is, without any warranty.
• I make no guarantee that it is free from bugs, data loss, or security issues.
• You are responsible for verifying results and keeping your own backups before using it on important files.
• Use it at your own risk.

Notes

• PillowLock is a practical personal project, not a certified security product.
• Original files are not deleted automatically.
• Overwrite is blocked by default.
• If you use a key file, keep a backup in a separate safe place.
• Losing the password or required key file can make recovery impossible.