Verfahren und System zur sicheren Datenübertragung

摘要

The method involves transmitting a data message from a subscriber (21) to a subscriber (22) over a data transmitting protocol, and examining the data message by an evaluating unit arranged in the subscriber (22). A reply message is transmitted from the subscriber (22) to the subscriber (21) depending on result of the examination of the data message. The reply message is tested by an evaluating unit arranged in the subscriber (21). An independent claim is also included for a system for transmission of safety-related data for controlling an automation system and executing a method for transmission of data between subscribers of a communication system.