Encrypting e-mail

Encryption means scrambling the text of your message to a seemingly gibberish combination of letters and numbers, so that anyone who reads it en route can make no sense of it. Only the recipient is able to decrypt the message.
Using public keys is the most common form of encryption. This requires the use of two keys - a public key and a private key. The private key resides on your computer and you share the public key with the recipients to which you wish to send encrypted messages. When you wish to send the message, you encrypt it with the public key. On the other end, the recipient needs its own private key and your public key to decrypt the message. Since the message is decrypted using your public key, it proves that you sent the message. You can encrypt messages as well as attachments.
If you use Outlook as your e-mail client, encryption is built into it via digital IDs, which enable you to encrypt your message and digitally sign it as well. You can also use the popular public-key encryption system, PGP (Pretty Good Privacy), with Outlook itself and with other e-mail clients. This utility is available as freeware on Source: www.pgpi.org.