International Association for Cryptologic Research

International Association
for Cryptologic Research

IACR News item: 10 June 2024

Bishnu Charan Behera, Somindu C. Ramanna
ePrint Report ePrint Report
In this work, we propose a construction for $ Multi~Input~Inner ~Product ~Encryption$ (MIPFE) that can handle vectors of variable length in different encryption slots. This construction is the first of its kind, as all existing MIPFE schemes allow only equal length vectors. The scheme is constructed in the private key setting, providing privacy for both message as well as the function, thereby achieving the so-called $full-hiding$ security. Our MIPFE scheme uses bilinear groups of prime order and achieves security under well studied cryptographic assumptions, namely, the symmetric external Diffie-Hellman assumption.

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