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InfoResearchPeer-reviewed
ESCM: A Toolkit for Efficient and Secure Outsourced Computation With Multiple Keys
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Summary
The paper presents ESCM, a toolkit for outsourced computation under homomorphic encryption that lets servers run operations such as multiplication, division and sorting across different encrypted domains, so participants need not share one key. To resist collusion among servers and outages, the authors propose a distributed two trapdoor cryptosystem supporting (k,n) threshold decryption. Theoretical analysis, complexity comparisons with existing solutions, and simulation experiments are reported.