You'd trust that to a browser plugin? - EricaJoy

Erica, abso-fricking-lutely. Much more than I'd trust it to a tiny mom & pop web shop to safeguard my credit card and other info. The browser plugin might only get the one-time card #, not the my real card number. Would I trust the plugin more if it came from a big/reputable company? Sure. But in the Omaha airport, the wifi wanted my credit card and didn't have have SSL turned on--and yes, it was the official provider. So I'd totally use this plugin to buy tons more stuff. - Matt Cutts

Have you tried Virtual Account Number from Citibank (http://tr.im/2rdw)? I used that in the past and I loved the VAN generation aspect but I haven't used the autofill feature -- every time I needed a new credit card number, I generated it and manually entered it on the shopping web site. - Michal Cierniak

I'd settle for Schwab giving me a physical credit card with an LCD screen and a keypad that I could use to generate a one-time # on the fly. As it is now that I only use Amazon or sites that accept PayPal or Google Checkout. - DeWitt Clinton

Paypal itself has a virtual debit card in beta with will let you use paypal with sites that don't support it using a one-time number. - Robin Barooah

I believe the CCs are moving away from the one time numbers - amex killed them and i hear citi is moving that way too - i really liked the program - Allen Stern

Allen, that's surprising. Do you have any idea of why one-time CC numbers might be falling out of favor? - Adam Lasnik

We could never get them here :-(. - John Mueller

I 2nd this motion. - John Honeck

+1 on the Citibank solution, but needs to be available generically for the major CCs - Joshua Allen

I'm pretty sure the PayPal plugin does this, but the last time I checked it was Windows-only (so I've never used it). The screenshot at https://www.paypal.com/us... shows a "generate secure card" button. - Laurence Gonsalves

Citibank's system is a nice idea, but it's too much work to use. The whole point is to prevent a tremendous amount of hassle if my numbers get stolen, but the likelihood of that is low, and meanwhile I'm just amortizing that inconvenience across all my transactions. Do I really come out ahead? A browser plugin that made me log in just once ever and that could autofill -- that would be a win. I'm not sure what the point of paypal or G checkout is. - Seth

PayPal's plugin does this, works at non-PayPal sites, etc. but requires that you fund PayPal from your bank checking account - not from another credit card. In other words, no rewards! - Scott Loftesness