Synchrotron-based high-pressure research in materials science Page: 3 of 8
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Potentially classified data is surrounded by barrier
Unclassified data in protected area
Barrier elements
Unclassified data in open areaFigure 1. The basic information barrier concept.
To date, the information barrier concept has been applied to and successfully demonstrated
with attribute measurement systems. [2, 4, 5] These systems are conventional non-
destructive assay measurement systems whose outputs are compared to an agreed threshold
and only simple yes/no results are passed through the barrier. These systems protect the
classified information from unauthorized disclosure while giving the inspector confidence
that the system is operating nominally. In this paper, we will explore the idea of using
information barriers to protect information in systems for which it would be desirable to
remotely monitor the data from the measurement system but for which legal constraints
forbid such transmission.
Unattended and Remote Monitoring
Many of the advantages of unattended and remote monitoring systems have been
realized. A system that can operate in an unattended mode without the loss of safeguards
data and that can transmit that data to an inspector in a central location results in
considerable cost savings relative to inspector travel and on-site presence. Such systems
also benefit the facility operator by reducing the disruption to normal operations caused by
inspection activities. Unattended systems have been used for many years. It is only
recently that remote transmission of data has become cost effective enough to be practical.
Great strides have also been made in developing methods to protect data during remote
transmission. Virtual Private Networks (VPNs), in particular, are gaining wide acceptance
as a secure way to transmit even some forms of sensitive data. In some instances, however,
a host country may be constrained by its own laws that forbid the remote transmission ofBarrier
Data
Measurement Barrier
System 0Control
Output
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Synchrotron-based high-pressure research in materials science, article, Date Unknown; [Los Alamos, New Mexico]. (https://digital.library.unt.edu/ark:/67531/metadc927177/m1/3/: accessed April 18, 2024), University of North Texas Libraries, UNT Digital Library, https://digital.library.unt.edu; crediting UNT Libraries Government Documents Department.