And how do you intend to find out if it is stolen or not? Besides, if you want me to give you my banking passwords, telling me 'hey there, I'm pretty sure your passwords won't be stolen, but if they are we'll let you know' aint really comforting.

Rather than giving you my passwords and waiting anxiously for that fateful email saying 'Your passwords have been compromised', wouldn't I be better off just not giving them to you?

Also, how do you guarantee that they won't be compromised? If you have really cracked this, then I think you're sitting on a fairly big pot of money.