AttacheCase

The program provides file and directory encryption and decryption on macOS, following standard cryptographic algorithms and using RFC 2898 for key derivation. Users can select files or folders, apply a three‑step workflow, and obtain output in a self‑executable format that includes the necessary public key information. The software is released under GPLv3, allowing the code to be inspected and rebuilt, while the macOS binary is signed with an Apple Developer ID.

It targets individuals and organizations that need to protect data locally on macOS without relying on external services. The utility supports both personal and commercial use; commercial deployments require a registration code, whereas the current macOS beta is offered free of charge and does not require a code. Documentation includes a PDF guide for registration and a help page for troubleshooting.

Distinctive aspects include adherence to world‑standard encryption algorithms, integration of RFC 2898 key derivation, and the ability to produce a single executable that contains the encrypted payload. The macOS version is distributed outside the App Store but is notarized and signed, and the source remains openly available under GPLv3.