A cross domain solution is a means of information assurance that provides the ability to access or transfer digital data between varying security domains. Most acceptable cross domain solutions focus mainly on risk management policies that rely on using protected or trusted parties to handle the information in order to solve this problem; thus, a cross domain solution that is able to function in the presence of untrusted parties is an open problem.
Homomorphic encryption is a type of encryption that allows its party members to operate and evaluate encrypted data without the need to decrypt it. Practical homomorphic encryption is an emerging technology that may propose a solution to the unsolved problem of cross domain routing without leaking information as well as many other unique scenarios. However, despite much advancement in research, current homomorphic schemes still challenge to achieve high performance. Thus, the plausibility of its implementation relies on the requirements of the tailored application.
We apply the concepts of homomorphic encryption to explore a new solution in the context of a cross domain problem. We built a practical software case study application using the YASHE fully homomorphic scheme around the specific challenge of evaluating the gateway bypass condition on encrypted data. Next, we assess the plausibility of such an application through memory and performance profiling in order to find an optimal parameter selection that ensures proper homomorphic evaluation. The correctness of the application was assured for a 64-bit security parameter selection of YASHE resulting in high latency performance. However, literature has shown that the high latency performance can be heavily mitigated through use of hardware accelerators. Other configurations that include reducing number of SIMON rounds or avoiding the homomorphic SIMON evaluation completely were explored that show more promising performance results but either at the cost of security or network bandwidth.
Computer Engineering (MS)
Department, Program, or Center
Computer Engineering (KGCOE)
Tinker, Cody W., "Exploring the Application of Homomorphic Encryption for a Cross Domain Solution" (2018). Thesis. Rochester Institute of Technology. Accessed from
RIT – Main Campus