Unlike functional safety, the challenge for industrial security is that security mechanisms need to constantly adapt to the threat situation and gaps in security can ultimately impair production with all its functional elements.
The demands that the worlds of IT and automation place on security vary considerably. While the confidentiality of information is the number one priority in an office environment, availability of data is most important in the production area, as this is a key requirement for a smooth manufacturing process. An international standard (IEC 62443) is currently being drafted, which is intended to harmonise both worlds.
As the threats from the cyber world are dynamic, safety and industrial security will in future remain two separate issues, which are however very closely interconnected.