Salus: A System for Server-Aided Secure Function Evaluation

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Executive Summary

Secure Function Evaluation (SFE) allows a set of mutually distrustful parties to evaluate a function of their joint inputs without revealing their inputs to each other. SFE has been the focus of active research and recent work suggests that it can be made practical. Unfortunately, current protocols and implementations have inherent limitations that are hard to overcome using standard and practical techniques. Among them are: requiring participants to do work linear in the size of the circuit representation of the function, requiring all parties to do the same amount of work and not being able to provide complete fairness.

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