Yeah, I was a user. It was called Private Payments and went back at least as far as 2000.

Here's an interesting article from 2000 [1], declaring it basically unnecessary because cards were safe in transit. Some of the quotes and rationale are hilarious. Definitely from the pre-breach-of-the-month era.

[1] http://www.forbes.com/2000/09/08/mu4.html