[SystemSafety] The Intertwining of Safety and Security

[paul cleary]

Really it's only just become a hot topic now!! Wow

There can be no safety without security. I'm still amazed that discussions on this forum and other like, continue to deliberate on subjects such as (notional) software reliability, and applying safety efforts to reduce take probability of failures occurring within software and hardware based systems, yet no discussion on security. A system and its software can be designed to never fail, yet without robust security, the software can easily be comprised and changed, rendering and notions of system safety completely irrelevant!!

Paul Cleary  BSc, MSc, CEng, EUR ING
RailAssuranceConsulting


On Nov 7, 2016, at 6:24 PM, Peter Bernard Ladkin <ladkin at causalis.com<mailto:ladkin at causalis.com>> wrote:

A very hot topic nowadays. But I encounter a lot of people who think you can actually handle syste
safety and system security in IACS systems separately. I encounter others who think that ensuring
safety means you need to make sure your safety functions are not compromised.

Not so. Your safety functions may be perfect, remain uncompromised, and still be insufficient to
inhibit an unacceptable risk due to intruder activity. The argument is straightforward.

https://abnormaldistribution.org/index.php/2016/11/07/an-observation-on-the-intertwining-of-safety-and-security/

PBL

Prof. Peter Bernard Ladkin, Bielefeld, Germany
MoreInCommon
Je suis Charlie
Tel+msg +49 (0)521 880 7319  www.rvs-bi.de<http://www.rvs-bi.de>





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