Smart cards for the authentication in machine controls
OwnerClemens Atzmueller, Werner Muellerinventors
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Abstract
The invention relates to an efficient and interference insensitive authentication test procedure for accessing a machine control (1). Said procedure is carried out through reading and checking of cards (10-12) in a centralised control system and/or in decentralised control systems.
Claims16
A method for authentication testing for access to a machine control unit, in particular of a machine tool control unit, a printing press control unit, or the like, in which the authentication testing takes place through the reading and testing of a card (10 to 12), characterized in that there are several different degrees of access authorization, which permit different actions in a control unit, where the degrees of access authorization are stored on the card or in a file (6 to 9).
The method according to one of the preceding claims, characterized in that a card is a smart card, in particular an intelligent smart card and/or a card with a memory.
The method according to one of the preceding claims, characterized in that a card is one, which can be read magnetically, optically, or electronically.
The method according to one of the preceding claims, characterized in that a file, which is stored in a remote control unit (18 to 20) and contains data relating to access-authorized cards, is matched to a file (6) stored in the central control unit at regular intervals and/or when changes are made to a file.
The method according to one of the preceding claims, characterized in that in the event of an interruption in the connection (21 to 24) of a remote control unit (3) to the central control unit (2) or to another remote control unit (4, 5), until the connection (21 to 24) is reestablished, the remote control unit (3) continues to perform an authentication testing based on the last data (7) stored in it before the connection was broken.
The method according to one of the preceding claims, characterized in that the authentication testing of a card also includes the fact that a code word is requested from the user of the card.
A control unit for executing the method according to one of the preceding claims.
Dependencies are inferred from the claim text.