Gambs, Sebastien
Guerraoui, Rachid
Harkous, Hamza
Huc, Florian
Kermarrec, Anne-Marie
Scalable and Secure Aggregation in Distributed Networks
We consider the problem of computing an aggregation function in a \emph{secure} and \emph{scalable} way. Whereas previous distributed solutions with similar security guarantees have a communication cost of $O(n^3)$, we present a distributed protocol that requires only a communication complexity of $O(n\log^3 n)$, which we prove is near-optimal. Our protocol ensures perfect security against a computationally-bounded adversary, tolerates $(1/2-\epsilon)n$ malicious nodes for any constant $1/2 > \epsilon > 0$ (not depending on $n$), and outputs the exact value of the aggregated function with high probability.
CoRR
2011
http://infoscience.epfl.ch/record/208765/files/scal_secur_aggreg_dn1107.5419v3.pdf;