Registered ABE via Predicate Encodings

ePrint Report: Registered ABE via Predicate Encodings

Ziqi Zhu, Kai Zhang, Junqing Gong, Haifeng Qian

This paper presents the first generic black-box construction of registered attribute-based encryption (Reg-ABE) via predicate encoding [TCC'14]. The generic scheme is based on $k$-Lin assumption in the prime-order bilinear group and implies the following concrete schemes that improve existing results:


- the first Reg-ABE scheme for span program in the prime-order group; prior work uses composite-order group;


- the first Reg-ABE scheme for zero inner-product …

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