think we can assume complete security because the software itself is so complex, the best measures we can take is to limit the amount of private information that we post on internet sites and to trust that facebook needs to work with advertisers who will promise that if they become into possession of this information, one way or another, that they will not misuse it. >> paul gillen, great talking to you. thanks, paul. now, facebook acknowledges the problem. while knowledge of user i.d. does not permit access to anyone's information on facebook -- i'm reading a statement. i better make that clear. we plan to introduce new technical systems that will dramatically limit the sharing of user i.d.s. it is important to note that there is no evidence that any personal information was misused or even collected as a result of this issue. in fact, all of the companies questioned about this issue said publicly that they did not use