deadbolt

deadbolt removes all the complication of encrypting and decrypting files. Select a file to encrypt, enter a password, and … that’s it. Decrypting the file is as simple as entering the password.

You can download deadbolt for Mac OS, Windows, or Linux. Any encrypted file can be shared across these platforms.

Note: deadbolt can only encrypt files. To encrypt a directory, compress it into a .zip file before using deadbolt.

Installation

If you're running Mac OS, install deadbolt with Homebrew:

$ brew cask install deadbolt

If you're running Windows or Linux, download the latest release here.

How it Works

deadbolt is built on Electron and uses crypto.js from the node.js standard library. The encryption protocol used is AES-256-GCM. The derived key for the cipher is created using 10,000 iterations of pbkdf2Sync, taking in a 64B randomly generated salt, the user generated password, a 32B key length and SHA512 digest. The authenticity of the data is verified with the authentication tag provided by using GCM.

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.alichtman.deadbolt dyn.ah62d4rv4ge80k2xtrv4a all

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

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