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We construct a bump-in-the-wire (BITW) solution that retrofits
security into time-critical communications over bandwidth-limited
serial links between devices in Supervisory Control And Data
Acquisition (SCADA) systems. Previous BITW solutions fail to provide
the necessary security within timing constraints; the previous
solution that does provide the necessary security is not BITW. At a
comparable hardware cost, our BITW solution provides sufficient
security, and yet incurs minimal end-to-end communication latency. A
microcontroller prototype of our solution is under development.
Updated as TR2008-617.
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Patrick P. Tsang and Sean W. Smith, "YASIR: A Low-Latency, High-Integrity Security Retrofit for Legacy SCADA Systems." Dartmouth Computer Science Technical Report TR2007-603, September 2007.
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