The Resilience Model Supporting IIoT System Trustworthiness
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Anticipate: maintain a state of
informed preparedness for adversity
Withstand: continue essential
mission or business functions
despite adversity
Recover: restore mission or business
functions during and after adversity,
and
Adapt: modify mission or business
functions and/or supporting
capabilities to predicted changes in
the technical, operational or
threat environments.
lowest levels of service necessary to ensure
a successful, although possibly degraded,
service execution. A system whose
performance is degrading will operate at
progressively lower levels of QoS until it
crosses its minimum QoS requirements, at
which point it may still be operational, but it
has failed to maintain service continuity.
Possible responses of a system to an impulse
at time A are depicted in Figure 2.
Resilience objectives are defined as
follows:
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Understand
Prepare
Prevent
Transform
Re-Architect
Continue
Constrain
Reconstitute
Restore
Volume 2 of the NIST Special
Publication 800-160 also considers the
resilience approaches and techniques.
Figure 2: Possible responses of a system to an impulse at time A
The paper name “Resilience is More than
Availability” of M. Bishop et al is based on
the example shown in Figure 2. 9 In this
figure, B represents the time taken for the
system to return to its equilibrium QoS. C
represents the maximum disturbance for
system D. Another possible response is
The Industrial Internet Security Framework
defines resilience through the Quality of
Service (QoS). 8 Desirable QoS determines
the normal operating conditions for the
system, while minimum QoS defines the
8
Industrial Internet of Things. Volume G4: Security
http://www.iiconsortium.org/pdf/IIC_PUB_G4_V1.00_PB-3.pdf
Framework.
Industrial
Internet
Consortium,
2016.
9
M. Bishop, M. Carvalho, R. Ford, and L.M. Mayron. Resilience is More than Availability. In NSPW '11 Proceedings of the 2011
New Security Paradigms Workshop, Marin County, California, USA, 2011. http://nob.cs.ucdavis.edu/bishop/papers/2011-
nspw/resilience.ps
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IIC Journal of Innovation