Deadbolt++

Deadbolt++ simplifies encrypting and decrypting files. All you need is a password.

Select a file to encrypt, enter a password, and … that’s it. Decryption is just as easy.

You can download Deadbolt++ for Mac OS and Linux. Any encrypted file can be shared across these platforms.

Note: deadbolt++ can not encrypt directories. To encrypt a directory, compress it into a .zip (or any archive format) file before using deadbolt++.

Acknowledgment

This is a fork of the deadbolt project, with the aim of improving the security of the tool and adding more useful features. The aim is to upstream any relevant changes to the original project.

Installation

Download the latest release here or build from source.

How it Works

Non-Technical Version

Deadbolt++ uses a proven, secure encryption algorithm to make sure your files stay safe.

Technical Version

Deadbolt++ is built on Electron and uses crypto.js from the node.js standard library. The encryption protocol used is AES-256-GCM. This algorithm is part of the NSA's Commercial National Security Algorithm Suite and is approved to protect up to TOP SECRET documents. A 256-bit derived key for the cipher is created using 100,000 iterations of pbkdf2 with the SHA-512 HMAC digest algorithm, a 64-byte randomly generated salt, and a user generated password. The authenticity of the data is verified with the authentication tag provided by using GCM. These parameters were chosen by following the NIST Guidelines for pbkdf2.

Note: The original deadbolt project uses a different, less secure pbkdf2 iteration count. Files encrypted with deadbolt are therefore not currently compatible with Deadbolt++ and vice versa.

FAQ

Showing Extensions on macOS

By default, macOS hides file extensions. To reduce confusion about what type each file is, I recommend configuring macOS to show file extensions. You can do that with the following command: $ defaults write NSGlobalDomain AppleShowAllExtensions -bool true && killall Finder.

Setting deadbolt++ as Default App for .dbolt Files on macOS

You can set this app as the default app for .dbolt files, which means you'll be able to double-click on .dbolt files to open them with deadbolt for decryption.

You can set this up the first time you double-click on a .dbolt file, or by right-clicking on a .dbolt file, selecting Get Info and changing the default app in the Open With: section.

To do this programmatically, run the following snippet:

$ brew install duti
$ duti -s org.turmult.deadbolt dyn.ah62d4rv4ge80k2xtrv4a all

The output of $ duti -x dbolt should then be:

$ duti -x dbolt
Deadbolt.app
/Applications/Deadbolt.app
org.turmult.deadbolt