IEC TS 63074: 2023 - Security aspects related to functional safety

Last edit: 12/06/2023

IEC TS 63074:2023 Safety of machinery – Security aspects related to functional safety of safety-related control systems.


IEC TS 63074 identifies the relevant aspects of the IEC 62443 series related to security threats and vulnerabilities that are considered for the design and implementation of safety-related control systems (SCS) which can lead to the loss of the ability to maintain safe operation of a machine.

Typical security aspects related to the machine with potential relation to SCS are:

  • vulnerabilities of the SCS either directly or indirectly through the other parts of the machine which can be exploited by security threats that can result in security attacks or security breaches;
  • influence on the safety characteristics and ability of the SCS to properly perform its function;
  • typical use case definition and application of a corresponding threat model.

Non-safety-related aspects of security threats and vulnerabilities are not considered in this Technical Standard.

Non-safety-related parts of the machine control system can also be affected by security threats with possible impact on operation of a machine, such as productivity, performance or quality. Those aspects are outside the scope of this specification but are covered in the IEC 62443 series.

The relationship between safety and security aspects can be characterized as follows:

  • a machine has appropriate protective measures;
  • security countermeasures applied to a machinery should be appropriate to avoid degradation of the performance of protective measures that implement safety functions, including safety-related data.
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