Method for a secure information transfer

The method serves for a secure information transfer between a user device (C) and a central computer (S-D), arranged in a closed network. A connection request is signalled to a second computer (R-Q), not arranged in the closed network, from the user device (C), using the central computer (S-D). The second computer (S-Q) then transmits a message (TAN 1 )-containing an identification (SessionID) to a third computer (S-Z), arranged in the private network. The third computer (S-Z) stores the identification (Session ID) and transmits a verification report (TAN 2 ) containing an access address (URL) for the central computer (S-D) to the second computer (S-Q), which forwards the verification report (TAN 2 ) to the user device (C). The user device (C) then initialises a connection to the central computer (S-D), using the access address (URL), whereby the connection is only accepted by the central computer (S-D) n those cases where the access can be authorised by the stored identification (SessionID).