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- W4385654365 abstract "In the last decade, zero-knowledge proof of knowledge protocols have been extensively studied to achieve active security of various cryptographic protocols. However, the existing solutions simply seek zero-knowledge for both message and randomness, which is an overkill in many applications since protocols may remain secure even if some information about randomness is leaked to the adversary. We develop this idea to improve the state-of-the-art proof of knowledge protocols for RLWE-based public-key encryption and BDLOP commitment schemes. In a nutshell, we present new proof of knowledge protocols without using noise flooding or rejection sampling which are provably secure under a computational hardness assumption, called Hint-MLWE. We also show an efficient reduction from Hint-MLWE to the standard MLWE assumption. Our approach enjoys the best of two worlds because it has no computational overhead from repetition (abort) and achieves a polynomial overhead between the honest and proven languages. We prove this claim by demonstrating concrete parameters and compare with previous results. Finally, we explain how our idea can be further applied to other proof of knowledge providing advanced functionality." @default.
- W4385654365 created "2023-08-09" @default.
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- W4385654365 date "2023-01-01" @default.
- W4385654365 modified "2023-09-23" @default.
- W4385654365 title "Toward Practical Lattice-Based Proof of Knowledge from Hint-MLWE" @default.
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- W4385654365 doi "https://doi.org/10.1007/978-3-031-38554-4_18" @default.
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