Siemens SIMATIC ET 200AL System Manual page 986

Definition of security
Generic term for all the measures taken to protect against:
● Loss of confidentiality due to unauthorized access to data
● Loss of integrity due to manipulation of data
● Loss of availability due to destruction of data, for example, through faulty configuration
and denial-of-service attacks
Threats
Threats can arise from external and internal manipulation. The loss of data security is not
always caused by intentional actions.
Internal threats can arise due to:
● Technical errors
● Operator errors
● Defective programs
Added to these internal threats there are also external ones. The external threats are not
really any different to the known threats in the office environment:
● Software viruses and worms
● Trojans
● Man-in-the-middle attacks
● Password Phishing
● Denial of Service
PROFINET with STEP 7 V15
Function Manual, 12/2017, A5E03444486-AH
Description
2.2 Setting up PROFINET
39