Feb. 6, 2024, 11:48 a.m. |

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ePrint Report: Registered Functional Encryption for Quadratic Functions from MDDH

Qiaohan Chu, Li Lin, Chen Qian, Jie Chen


We present a Registered Functional Encryption (RFE) scheme for inner product and a RFE scheme for quadratic functions based on pairings and relying on the Matrix Decision Diffie-Hellman (MDDH) assumption and bilateral MDDH assumption. Previously, RFE is only known to be constructed from indistinguishability obfuscation (iO) in Francati-Friolo-Maitra-Malavolta-Rahimi-Venturi [Asiacrypt '23].

chen decision diffie encryption eprint report functions hellman matrix product report

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