Whats the difference between PGP and FileVault?
PGP (for Windows or Mac) encrypts your entire hard drive; FileVault (for Mac) only encrypts your home directory. The advantage of using PGP is the 24-hour support from ITS; additionally, if you forget your passphrase, ITS can still help you access your information. With FileVault, once your passphrase is gone, so is your access.