New ISA84 technical report on security countermeasures related to SIS
The ISA84 standards committee on functional safety has completed and approved ISA-TR84.00.09-2013, Security Countermeasures Related to Safety Instrumented Systems (SIS). The new technical report provides guidance on countermeasures for reducing the likelihood of a security breach that would degrade the ability of the SIS to perform its functions.
The technical report describes performance criteria to guard against internal and external security threats to the SIS and gives guidance on how to comply with IEC 61511 and ANSI/ISA-84.00.01-2004, Functional Safety: Safety Instrumented Systems for the Process Industry Sector, with respect to cybersecurity.
The underlying premise of the technical report is that the means to implement, operate, and maintain system security should not compromise the performance of the SIS. To this end, SIS installations should be designed and maintained using the foundational requirements found in IEC 61511 and ANSI/ISA-84.00.01-2004, and in the ISA/IEC 62443 series on cybersecurity developed by ISA99.
For ease of use, the technical report is organized into sections that correspond to the clause numbers of ANSI/ISA-84.00.01-2004/IEC 61511-1 as follows:
- Management of functional safety
- Hazard and risk analysis
- Allocation of safety functions to protection layers
- Safety requirements specification for the safety instrumented system
- Design and engineering of the safety instrumented system
- Design and development of other means of risk reduction
- Installation, commissioning, and validation
- Operation and maintenance
For information about viewing or obtaining this technical report or other ISA standards and technical reports, visit www.isa.org/findstandards.