Efficient and Round-Optimal Oblivious Transfer and Commitment with Adaptive Security
Efficient and Round-Optimal Oblivious Transfer and Commitment with Adaptive Security
复制标题
具有自适应安全性的高效且轮次最优的不经意转移和承诺
DOI:
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发表时间:
2020
期刊:
影响因子:
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通讯作者:
X. Wang
中科院分区:
文献类型:
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作者:
R. Canetti;Pratik Sarkar;X. Wang
We construct the most efficient two-round adaptively secure bit-OT in the Common Random String (( ext {CRS} )) model. The scheme is UC secure under the Decisional Diffie-Hellman (DDH) assumption. It incurs (mathcal {O}(1)) exponentiations and sends (mathcal {O}(1)) group elements, whereas the state of the art requires (mathcal {O}(kappa ^2)) exponentiations and communicates ( ext {poly}(kappa )) bits, where (kappa ) is the computational security parameter. Along the way, we obtain several other efficient UC-secure OT protocols under DDH:
The most efficient yet two-round adaptive string-OT protocol assuming global programmable random oracle. Furthermore, the protocol can be made non-interactive in the simultaneous message setting, assuming random inputs for the sender.
The first two-round string-OT with amortized constant exponentiations and communication overhead which is secure in the global observable random oracle model.
The first two-round receiver equivocal string-OT in the ( ext {CRS} ) model that incurs constant computation and communication overhead.
DOI:
10.1007/978-3-319-78375-8_17
发表时间:
2018-04
期刊:
IACR Cryptol. ePrint Arch.
影响因子:
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作者:
Fabrice Benhamouda;Huijia Lin
通讯作者:
Fabrice Benhamouda;Huijia Lin