This is an interesting concept. Once upon a time, there was big money to be made in a similar service for credit cards. You'd register your cards with this comp

This is an interesting concept. Once upon a time, there was big money to be made in a similar service for credit cards. You'd register your cards with this company and pay them an annual fee (usually around $20). If your wallet or cards were stolen, you could call their number and they'd call to freeze all your cards. The business was a bit scammy for a few reasons: the way they marketed being a key one; most CC companies won't/can't hold the card holder responsible for fraud anyway because of consumer protection laws, so the service was largely unnecessary. There was a lot of drama in that market at one point. Some light reading can be found here: http://www.google.com/search?q=safecard+services http://www.google.com/search?q=safecard+services So back to your service. I think there's real value here. I'm security concious. I use a password manager (1Password) and make full use of its features. I use a strong master password, but I still fear the day my laptop or iPhone are stolen. I worry that they'll find an exploit or some means to get to my password data, at which point I'm screwed. I would like to have the ability to lock down my most sensitive accounts in the event of a security breech. The primary friction revolves around trust. In order to reset my passwords, you'd need my account info. That means my data would be in yet another centralized location. This is bad practice. My password manager is a necessary evil. Your service would be another necessary evil. I'm not sure how you'll get past that.