Abstract: A method of accessing a physically secured rack includes assigning a task identification by a key computer system, which specifies a task for an administrator of an administration user group for access to the rack, transmitting the task identification from the key computer system to the administrator and an access control unit for the rack, prompting an input of the task identification by the access control unit, verifying the input task identification by the access control unit, prompting input of a personal access identification of the administrators by the access control unit, verifying the input personal access identification of the administrator by the access control unit, and releasing a physical access security system for the access to the administrator to the rack if both preceding verification steps are successful.

Abstract: A method for the protected deposit of event protocol data of a computer system provides access control which prohibits access to event protocol data in the computer system and also performs: reading event protocol data generated in the computer system, sequential assignment of individual data sections of the read event protocol data to one of at least two categories in accordance with predetermined criteria, merging the categorized data sections for each respective category into a sub-file, and separate storage of created sub-files and setting up an access option to access the individual sub-files.

Abstract: A method of performing tasks on a production computer includes retrieving a one task description file stored on a task computer and containing a description of a task on a production computer, transferring the task description file from the task computer to a production computer, causing the production computer to check that the file is associated with at least one task stored on the production computer, performing the task associated with the file in the production computer using the file, if the association check was successful, wherein the task computer has open ports and the production computer keeps the ports closed so that access by a user of a first user group to the task computer is arranged, but access by a user of the group to the production computer is prevented while steps above are performed in a predetermined operating state of the production computer.

Abstract: A method of protected recovery of data stored in a backup computer system on a source computer system, wherein an access controller is provided that queries access information of a user group to access a recovery process, but prohibits access of the user group to the data stored in the backup computer system and prohibits general access of the user group to the source computer system per se, subject to write access if necessary to rewrite data onto the source computer system. The recovery process can be instigated by a user of the user group if the queried access information matches stored access information of the user group, wherein the instigated recovery process comprises a rewriting of selected data from the backup computer system into the source computer system.

Abstract: A method for the protected deposit of event protocol data of a computer system provides access control which prohibits access to event protocol data in the computer system and also performs: reading event protocol data generated in the computer system, sequential assignment of individual data sections of the read event protocol data to one of at least two categories in accordance with predetermined criteria, merging the categorized data sections for each respective category into a sub-file, and separate storage of created sub-files and setting up an access option to access the individual sub-files.

Abstract: A method of performing tasks on a production computer includes retrieving a one task description file stored on a task computer and containing a description of a task on a production computer, transferring the task description file from the task computer to a production computer, causing the production computer to check that the file is associated with at least one task stored on the production computer, performing the task associated with the file in the production computer using the file, if the association check was successful, wherein the task computer has open ports and the production computer keeps the ports closed so that access by a user of a first user group to the task computer is arranged, but access by a user of the group to the production computer is prevented while steps above are performed in a predetermined operating state of the production computer.