If you are sending files or documents with sensitive information (eg. database credentials), you probably don’t want to send it without making sure it is encrypted. In Linux and OSX, I use a tool called GnuPG to add password protection to files I want to share with other people. This is, by no means, the best way to send sensitive information to someone else, but it does provide a small layer of protection against an unintended recipient opening and reading the contents.
For Ubuntu, fire up a terminal and run:
For OSX, install Homebrew and run:
To encrypt a sensitive file, navigate to the directory of the file and run:
If all is well, GnuPG will create an encrypted file named sensitive.txt.gpg. If someone tries to open and read the contents, they will get nothing but gibberish!
To decrypt a file, navigate to the directory of the file and run:
Now, enter the passphrase set for the file during encryption. Voila! The file is now decrypted as sensitive.txt.
Note: You may get the following:
gpg: WARNING: message was not integrity protectedHowever it doesn’t affect the result.