The paper suggests a method for confirming the pattern of information security system functioning. The method is based on calculating hash sums after the data passes through each required security element. A unique identifier is used for this purpose, assigned to each security element. Re-calculation of the hash sum of the entire data route for the automated system is performed after receiving data at the end-node. This al ows you to confirm or deny the correctness of the information security pattern for a particular end node of the system.