And the Winner is: Price Waterhouse Coopers.
Some people believe that the account-database of their carreer-site leaked mailaccounts and passwords, causing the mail issued by ZDF cited in my previous posting. I don't know if this is true. I don't state that this is the case. Others do. It is possible: I have an account there. PWC might believe this as well: their carreer-login-page is currently closed.