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1. (WO2001031407) SYSTEM AND METHOD FOR PREVENTING UNAUTHORIZED ACCESS TO MODULES, ESPECIALLY IN AUTOMATION SYSTEMS

Pub. No.:    WO/2001/031407    International Application No.:    PCT/DE2000/003769
Publication Date: Fri May 04 01:59:59 CEST 2001 International Filing Date: Thu Oct 26 01:59:59 CEST 2000
IPC: G05B 19/042
Applicants: SIEMENS AKTIENGESELLSCHAFT
TEN BRINK, Carsten
Inventors: TEN BRINK, Carsten
Title: SYSTEM AND METHOD FOR PREVENTING UNAUTHORIZED ACCESS TO MODULES, ESPECIALLY IN AUTOMATION SYSTEMS
Abstract:
The invention relates to a system and to a method for preventing unauthorized access to modules, especially modules in automation systems. According to the inventive method a system (AS) and a method is used to control the access between modules and a central processing unit. Said system comprises a central processing unit (KM) and at least one device (Mm) that can be linked with the central processing unit (KM). At least one first device (M1..Mn) is provided with means for transmitting an identifier (K) to the central processing unit (KM) and/or to a second device (M1..Mn) and the central processing unit (KM) and/or the second device (M1..Mn) is provided with means for evaluating the identifier (K) transmitted by the first device (Mm) in such a manner that the respectively received identifier (K) is compared with at least one comparative identifier stored in the central processing unit (KM) and/or the second device. The central processing unit (KM) and/or the second device (M1..Mn) deny operation of the first device (Mm) on the system if the received identifier does not correspond to the comparative identifier.