Cyber Physical Security Solutions for Pervasive Health Monitoring Systems - E-Healthcare Systems and Wireless Communications - page 155

Figure 2. CPS Security Domain Matrix

ments. Storage Security involves develop-
ing solutions for securing stored data in
CPS platforms from physical or cyber tam-
pering. Given the amount of data generated
by CPS it might be a practical to provide
the same level of security to all data gen-
erated by the CPS. Data-dependent deter-
mination of required security level might
be needed. Further, storage security is also
made more challenging in CPS due to the
fact that there is often intermittent local
storage in low-cost easily compromised
components such as sensors.
• Communication Security : An important
aspect of CPSs is that they are networked
in nature. This not only allows them to
form a network for data fusion, and de-
livery to back-end entities but also take
coordinated response actions (in both the
autonomic and active operational modes).
Communication security needs the devel-

opment and integration of protocols for
securing both inter and intra-CPS com-
munication from both active (interferers)
and passive (eavesdroppers) adversaries.
As a CPS is heterogeneous in nature, one
monolithic security solution is not suffi-
cient. More capable components in a CPS
might be able to use complex solutions
such as SSL/TLS however, entities such
as sensors and actuators might need low-
level, light-weight solutions which utilize
their context (Mueller, 2006) as in the
case of (Venkatasubramanian, Banerjee,
& Gupta, PSKAVenkatasubramanian,
Banerjee, & Gupta, PSKA: Usable and
Secure Key Agreement Scheme for Body
Area Networks, 2010).
• Actuation Control Security : This refers to
ensuring that during the autonomic or ac-
tive mode of operation, no actuation can
take place without the appropriate authori-