Authors: Martin Gilje Jaatun, Maria B. Line, Tor Olav Grotan
Addresses: Department of Software Engineering, Safety and Security SINTEF ICT, Trondheim NO-7465, Norway. ' Department of Software Engineering, Safety and Security SINTEF ICT, Trondheim NO-7465, Norway. ' Department of Safety and Reliability, SINTEF Technology and Society, Trondheim NO-7465, Norway
Abstract: Safety instrumented systems (SIS) as defined in IEC 61508 and IEC 61511 are very important for the safety of offshore oil and natural gas installations. Partly as a consequence of the evolving |integrated operations| concept, a need is emerging for remote access to such systems from vendors external to the operating company. This access will pass through a number of IP-based networks used for other purposes, including the open internet. This raises a number of security issues, ultimately threatening the safety integrity of SIS. In this article, we present a layered network architecture that represents current good practice for a solution to ensure secure remote access to SIS. Also, a method for assessing whether a given solution for remote access to SIS is acceptable is described.
Keywords: offshore oil installations; natural gas installations; process control; SIS; safety instrumented systems; secure remote access; autonomous safety systems; security; layered network architecture.
International Journal of Autonomous and Adaptive Communications Systems, 2009 Vol.2 No.3, pp.297 - 312
Available online: 26 Jun 2009 *Full-text access for editors Access for subscribers Purchase this article Comment on this article