Depending on what you mean by "so many", I think I'd create a simple little Password class that has the three properties you want (marked Serializable) then store them in an arraylist and any time you add or remove an item just serialize the arraylist. The confirming on removal should be trivial at that point because you could just get the password object and test it's values against what the user typed in.
Now by "so many", if you mean more than you'd want to sit in memory as a whole, then I'd say you should be using a different technology (LDAP, Database, etc.) to be doing this.