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Simulation Extractability in Groth's zk-SNARK
Zero-knowledge proofs zk-SNARKs simulation extractability
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2019/6/4
A Simulation Extractable (SE) zk-SNARK enables a prover to prove that she knows a witness for an instance in a way that the proof: (1) is succinct and can be verified very efficiently; (2) does not le...
QAP-based Simulation-Extractable SNARK with a Single Verification
SNARK non-interactive zero-knowledge proof simulation-extractability
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2019/5/31
The pairing-based simulation-extractable succinct non-interactive arguments of knowledge (SE-SNARKs) are attractive since they enable a prover to generate a proof with the knowledge of the witness to ...
On the security of the BCTV Pinocchio zk-SNARK variant
cryptographic protocols zk-SNARKs
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2019/2/27
The main result of this note is a severe flaw in the description of the zk-SNARK in [BCTV14]. The flaw stems from including redundant elements in the CRS, as compared to that of the original Pinocchio...
Making Groth's zk-SNARK Simulation Extractable in the Random Oracle Model
zk-snarks generic group model non-malleability
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2018/3/6
We describe a variant of Groth's zk-SNARK [Groth, Eurocrypt 2016] that satisfies simulation extractability, which is a strong form of adaptive non-malleability. The proving time is almost identical to...
Scalable Multi-party Computation for zk-SNARK Parameters in the Random Beacon Model
SNARKs zero-knowledge multi-party computation
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2017/11/1
Zero-knowledge succinct non-interactive arguments of knowledge (zk-SNARKs) have emerged as a valuable tool for verifiable computation and privacy preserving protocols. Currently practical schemes requ...
A multi-party protocol for constructing the public parameters of the Pinocchio zk-SNARK
SNARKs zero-knowledge cryptocurrencies
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2017/6/26
Recent efficient constructions of zero-knowledge Succinct Non-interactive Arguments of Knowledge (zk-SNARKs), require a setup phase in which a common-reference string (CRS) with a certain structure is...
A Subversion-Resistant SNARK
Common reference string generic group model non-interactive zero knowledge
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2017/6/22
While succinct non-interactive zero-knowledge arguments of knowledge (zk-SNARKs) are widely studied, the question of what happens when the CRS has been subverted has received little attention. In ASIA...
The Hunting of the SNARK
extractable functions knowledge assumptions knowledge of exponent
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2016/1/8
The existence of succinct non-interactive arguments for NP (i.e., non-interactive computationallysound
proofs where the verifier’s work is essentially independent of the complexity of the NP nondeter...
A Note on the Unsoundness of vnTinyRAM's SNARK
Verifiable Computation SNARGs SNARKs
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2015/12/30
Gennaro, Gentry, Parno, and Raykova (GGPR) introduced Quadratic Arithmetic Programs (QAPs) as a way of representing arithmetic circuits in a form amendable to highly efficient cryptographic protocols ...