Multi-Client Inner Product Encryption: Function-Hiding Instantiations Without Random Oracles

ePrint Report: Multi-Client Inner Product Encryption: Function-Hiding Instantiations Without Random Oracles

Elaine Shi, Nikhil Vanjani

In a Multi-Client Functional Encryption (MCFE) scheme, $n$ clients each obtain a secret encryption key from a trusted authority. During each time step $t$, each client $i$ can encrypt its data using its secret key. The authority can use its master secret key to compute a functional key given a function $f$, and the functional key can be applied to a collection of $n$ clients’ …

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