[bloopletech]

Whats the liability difference between the systems at work and the systems for the general public?

Strong crypto is, and should be, available to everyone.

[Spooky23]

The law.

Common carriers are required to to have "tappable" systems if the system is deemed to replace phone conversations.

[kabouseng]

The biggest difference is ease of use. The more secure a system, the less user friendly it tends to get, and that is the cause why the general public don't get secret and top secret cryptographic products...