Griffin: Towards Mixed Multi-Key Homomorphic Encryption

ePrint Report: Griffin: Towards Mixed Multi-Key Homomorphic Encryption

Thomas Schneider, Hossein Yalame, Michael Yonli

This paper presents Griffin, an extension of the mixed-scheme single-key homomorphic encryption framework Pegasus (Lu et al., IEEE S&P’21) to a Multi-Key Homomorphic Encryption (MKHE) scheme with applications to secure computation. MKHE is a generalized notion of Homomorphic Encryption (HE) that allows for operations on ciphertexts encrypted under different keys. However, an efficient approach to evaluate both polynomial and non-polynomial functions on encrypted data in MKHE …

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