Re: [SystemSafety] [EC 61508 and cybersecurity

From: RICQUE Bertrand (SAGEM DEFENSE SECURITE) < >
Date: Mon, 1 Jun 2015 13:06:59 +0200


It is not that simple.

Safety is a roughly 2D problem ( probability x consequence), the two dimensions being usually stable along the unique system timescale.

Security is a 3D problem with sub dimensions (attacker(motivation, capability), vulnerability(inherent, introduced), consequence), these dimensions being variable along two different timescales (target system timescale, attacker timescale).

Bertrand Ricque
Program Manager
Optronics and Defence Division
Sights Program
Mob : +33 6 87 47 84 64
Tel : +33 1 58 11 96 82
Bertrand.ricque_at_xxxxxx

From: systemsafety-bounces_at_xxxxxx Sent: Monday, June 01, 2015 12:50 PM
To: martyn_at_xxxxxx Subject: Re: [SystemSafety] [EC 61508 and cybersecurity

I have always though that safety and security are two sides of the same coin. Often it is just a difference of emphasis or wording but the requirements are very similar if not the same. The trouble is “cyber security” is the new buzzword so we need a standard for it….. Surely it is better build on 61508 for something that is both safe and secure?

Or do you want something that is secure but unsafe? ☺

Regards

   Chris

Phaedrus Systems Ltd Tel: FREEphone 0808 1800 358 96 Brambling B77 5PG Vat GB860621831 Co Reg #04120771 Http://www.phaedsys.com<http://www.phaedsys.com/> chills_at_xxxxxx

Sent: 01 June 2015 10:09
To: systemsafety_at_xxxxxx Subject: Re: [SystemSafety] [EC 61508 and cybersecurity

Where can I find details of the content of IEC 62443, and of the IEC workgroup?

Martyn

On 01/06/2015 09:42, RICQUE Bertrand (SAGEM DEFENSE SECURITE) wrote: There is currently an IEC workgroup on what to do with IEC 61508 and cybersecurity (IEC 62443). The topic is thus not ignored.

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systemsafety_at_xxxxxx Received on Mon Jun 01 2015 - 13:07:11 CEST

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