Witness Encryption with (Weak) Unique Decryption and Message Indistinguishability: Constructions and Applications

In this paper, we investigate WE scheme with the unique decryption and message indistinguishability, as well as its compelling applications. Our contributions are three-fold: (i) we first propose the notion of WE with MI and weak unique decryption, and give a construction based on public-coin differing-inputs obfuscation (diO), pseudorandom generator, and the Goldreich-Levin hard-core predicate; (ii) We show that our WE with MI and weak unique decryption can be used to construct a 4-round non-black-box honest-verifier zero-knowledge argument protocol; and (iii) We present a WE scheme with unique decryption and MI based on public-coin diO and weak auxiliary input multi-bit output point obfuscation (AIMPO). Moreover, we show that using our WE with unique decryption, we can get rid of the limitation of honest-verifier zero-knowledge property, thus yielding a 4-round non-black-box zero-knowledge argument.

Liang, Bei,1985Chalmers tekniska högskola,Chalmers University of Technology(Swepub:cth)lbei (författare)
Li, HongdaChinese Academy of Sciences (författare)
Ni, PeifangChinese Academy of Sciences (författare)
Chinese Academy of SciencesChalmers tekniska högskola (creator_code:org_t)

Ingår i:Lecture Notes in Computer Science (including subseries Lecture Notes in Artificial Intelligence and Lecture Notes in Bioinformatics)Cham : Springer International Publishing11547, s. 609-6191611-33490302-9743

Av författaren/redakt...: Pan, Dongxue; Liang, Bei, 1985; Li, Hongda; Ni, Peifang

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