Step 4: Encrypting a File
Encrypting a file can be accomplished in multiple ways. If you are sending the file as an attachment, it can be encrypted as an option in your email client. If you are encrypting the file on your hard drive, you must use a third-party application to do so. GPG4Win (the OpenGPG installation program) provides you with a right-click option for signing and encrypting. Glary Utilities also provides you with this feature. ** This is different from encrypting your entire drive through BitLocker, TrueCrypt, or other means.
OpenGPG uses GPGEx to sign and encrypt the file. You also have other options, such as decrypt, verify, decrypt and verify, sign, encrypt, import keys, and help with GPGEx. This works through the Kleopatra application that is installed with GPG4Win. You will choose the key (recipient) that you want to encrypt the file to (and one of your own keys). Then you will choose the key to sign with (should be the same as your own encryption key). Finally, click Sign and Encrypt, and it will encrypt the data. To decrypt the file, right click on the filename.gpg file and choose Decrypt and Verify.
Using a utility like GlaryUtilities, you are presented with a box that asks for a password, verify password, and hint. You have the option of creating an exe that will decrypt the file and deleting the original file. On the Decrypt tab, you can select the file, enter the password, and choose where to extract the unencrypted file to. Both methods are fairly quick and both create a file that cannot be read.