To encrypt any doc on your hard drive, just right-click on it, select the corresponding option, and adjust the encryption parameters to suit your needs.
For emails it's even easier: just associate the email account of the recipient to encrypt the content. Upon receipt, the email will require the insertion of the password you've set to be opened and read.
Flexcrypt 2010 uses three different kinds of encryption (Winzip PK, Winzip AES, and OPEN PGP) and is so easy to handle that any user can protect his or her docs regardless of ITC skill level.
Functional during a seven-day trial.