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Terms of Use

Last updated: 29 August 2026

1. What these terms cover

They cover the CipherBox application and this website. Downloading or running CipherBox means you accept them. If you do not, do not use it.

2. Licence

CipherBox is open source under the MIT licence. You may use, copy, modify and redistribute it, including commercially, as long as the copyright notice and the licence text travel with it. The full text is in LICENSE.

3. Acceptable use

Encrypt files you own or are authorised to handle. CipherBox securely overwrites and deletes the originals, so pointing it at someone else's data destroys their only copy. Check your local rules on encryption before you travel with encrypted media.

4. There is no recovery

Your master password is the only key. It is never stored — only the salt lands in ~/.cipherbox/config.json. Nobody, including us, can recover your files if you lose it. There is no backdoor, no reset and no support request that changes this. Write the password down and keep it somewhere safe before you encrypt anything you care about.

5. Privacy

CipherBox runs entirely on your machine. There is no account, no server, no telemetry and no network connection at all. Your files, filenames and password never leave your computer.

This website is static: no cookies, no analytics, no third-party scripts or fonts. Nothing about your visit is stored or shared.

6. No warranty

CipherBox is provided “as is”, without warranty of any kind. It is a personal project, not audited cryptography software. Bugs, an interrupted write or a failing disk can leave a file unrecoverable. Keep an unencrypted backup of anything you cannot afford to lose. No liability is accepted for data loss, damages or costs arising from use.

7. Limitation of liability

To the extent the law allows, the author is not liable for any loss or damage arising from use of CipherBox — lost files, lost time, lost business or a forgotten master password included. This applies however the loss arises and whether or not the possibility was known.

8. Third-party components

CipherBox builds on cryptography (the Fernet and PBKDF2 implementations) and CustomTkinter for the interface. Each keeps its own licence, and those terms apply alongside these. Releases are hosted by GitHub under GitHub's terms.

9. Trademarks and affiliation

CipherBox is an independent project, not affiliated with or endorsed by Microsoft, Apple, the Python Software Foundation or any other party named here. All trademarks remain with their owners.

10. Changes

These terms may change as the project does. The version in the repository at the time you download is the one that applies to that copy, and the date above says when this page last moved.

11. Contact

Questions, bug reports and licence enquiries go through GitHub issues.