Abstract: The invention relates to a device for the protected output of electronic documents via Internet, comprising user-end access unit (16) and output unit (24) which is allocated to said output unit. A received document contains software instructions which can be executed through the output unit and which contains a designation of a file or to a path in the data transmission network. Components of the document are altered using this designation, whereby it is being prepared by a server-end deconstruction unit (26) so that it is only suitable for use in the form provided for the user after the software instruction has been executed. A server-end reconfiguration unit (28) is configuring software instructions or document components in such a way that when the document is received by the user again another access operation have to be used in which loaded instructions or document components are modified.