On Circuit Private, Multikey and Threshold Approximate Homomorphic Encryption

ePrint Report: On Circuit Private, Multikey and Threshold Approximate Homomorphic Encryption

Kamil Kluczniak, Giacomo Santato

Homomorphic encryption for approximate arithmetic allows one to encrypt discretized real/complex numbers and evaluate arithmetic circuits over them. The first scheme, called CKKS, was introduced by Cheon et al. (Asiacrypt 2017) and gained tremendous attention. The hype for CKKS-type encryption stems from its potential to be used in inference or multiparty computation tasks that do not require the exact output, for example, inference and training …

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