We knew that when sending e-mail, transferring a file, or logging into a terminal session across a network, others on that network could, if they chose to, read that information. We also know about cryptography. If we didn't before, the news around the US National Security Agency's attempt to get the world using NSA-created encryption hardware made sure everyone who read a newspaper knew about it. And the controversies regarding the export of strong cryptography go on today. This note isn't about export issues.
Strong cryptography is commercially available all over the world.
Some of you think that using cryptographic products will take a big step, a major commitment from your organization. Yes, you need a PKI, but you can get away with a very lightweight one to start. And to start using, then deploying, encryption products just takes first steps. What I will do is suggest first steps to take for the organization, or individual, wanting to start to use encryption products. Start Encrypting Sensitive Files on Your PC Free, licensed products are available for use on Windows platforms, Macs, and UNIX systems.