Secure Data Transmission

PKZIP (PKWARE)

An excellent choice for transmitting confidential data over the Internet.

(Practical instructions on how to set it up and use it) - PKWARE

VeriSign

An excellent choice for transmitting secured emails, but requires a very fast PC if your email attachments are significant in size (e.g., larger than 5 MB).

(Practical instructions on how to set it up and use it) - VeriSign

Pretty Good Privacy (PGP)

An excellent choice for securing data on your PC