What is “signify-osx” Package?

Cryptographically sign and verify files
For more details: http://man.openbsd.org/OpenBSD-current/man1/signify.1

Installation

• Open Terminal by pressing command+space then type terminal and hit Enter key.
• Install homebrew first.

  ruby -e "$(curl -fsSL https://raw.githubusercontent.com/Homebrew/install/master/install)" < /dev/null 2> /dev/null

• Install signify-osx.

  brew install signify-osx

Now, use signify-osx!