@TechReport{Dartmouth:TR2007-603, author = {Patrick P. Tsang and Sean W. Smith}, title = {{YASIR: A Low-Latency, High-Integrity Security Retrofit for Legacy SCADA Systems}}, institution = {Dartmouth College, Computer Science}, address = {Hanover, NH}, number = {TR2007-603}, year = {2007}, month = {September}, URL = {http://www.cs.dartmouth.edu/reports/TR2007-603.pdf}, comment = { Updated as TR2008-617. You can find it here. }, abstract = { 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. } }