Sometimes email contains sensitive data which must be encrypted. You can handle this two ways, manually encrypt the data or use an exceptional Thunderbird Extension called Enigmail. This extension uses gpg and makes the encryption/decryption as user-friendly as it gets. With keys installed in Enigmail (either manually or from a keyserver) encrypted email is automatically [...]
Secure your files: An introduction to GnuPG
GnuPG allows you to encrypt data so only the intended recipient, with a key and a password, can decrypt it. It also provides a mechanism for verifying data is from the person who has claimed to send it. GnuPG can also provide a way for you to securely prevent your files from being opened without [...]