Registered Functional Encryptions from Pairings

ePrint Report: Registered Functional Encryptions from Pairings

Ziqi Zhu, Jiangtao Li, Kai Zhang, Junqing Gong, Haifeng Qian

This work initiates the study of concrete registered functional encryption (Reg-FE) beyond ``all-or-nothing'' functionalities:


- We build the first Reg-FE for linear function or inner-product evaluation (Reg-IPFE) from pairings. The scheme achieves adaptive IND-security under $k$-Lin assumption in the prime-order bilinear group. A minor modification yields the first Registered Inner-Product Encryption (Reg-IPE) scheme from $k$-Lin assumption. Prior work achieves the same security in …

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