Secure remote access to autonomous safety systems: A good practice approach Online publication date: Fri, 26-Jun-2009
by Martin Gilje Jaatun, Maria B. Line, Tor Olav Grotan
International Journal of Autonomous and Adaptive Communications Systems (IJAACS), Vol. 2, No. 3, 2009
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.
Online publication date: Fri, 26-Jun-2009
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