I'm asking my question here since I was not able to find an answer anywhere. I have written a piece of software which stores pretty delicate passwords. I have used BCrypt as hashing algorithm with an appropriate setting of strength. Point is, I have now implemented a method which, everytime the user changes something, chooses a new random salt and hashes the passwords using the new salt. Now worst case scenario would be that someone has, say, one hundred pairs of the passwords hash with the used salt. My question is if this information would help an attacker, and if yes, to which extent.
Thanks to everyone who takes his time to read/answer my question in advantage. Cheers, Tephelon