In order to efficiently prevent the save-and-restore attack on usage rights associated with digital work, these usage rights are protected by a hidden channel. In order to make it a difficult or expensive to manipulate the hidden channel, a device is proposed comprising: writing means (34) for writing on a record carrier (20) said digital work (DW) and attached usage right information (22) defining one or more conditions to be satisfied in order for the usage right to be exercised, - fingerprint extraction means (23) for deriving fingerprint data (24) from physically uncontrollable, changeable non-uniformities on said record carrier (20) , and authentication means (25) for generating authentication data (26) from said fingerprint data (24) and said usage right information (22) , said authentication data being provided for authenticating said usage right information, said writing means (34) being adapted for writing said authentication data (25) on said record carrier (20) .