Amortizing Rate-1 OT and Applications to PIR and PSI
Amortizing Rate-1 OT and Applications to PIR and PSI
复制标题
摊销率 1 OT 以及 PIR 和 PSI 的应用
DOI:
10.1007/978-3-030-90456-2_5
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发表时间:
2022
期刊:
影响因子:
--
通讯作者:
Miao, P.
中科院分区:
文献类型:
--
作者:
Chase, M.;Garg, S.;Hajiabadi, M.;Li, J.;Miao, P.
Recent new constructions of rate-1 OT [Döttling, Garg, Ishai, Malavolta, Mour, and Ostrovsky, CRYPTO 2019] have brought this primitive under the spotlight and the techniques have led to new feasibility results for private-information retrieval, and homomorphic encryption for branching programs. The receiver communication of this construction consists of a quadratic (in the sender’s input size) number of group elements for a single instance of rate-1 OT. Recently [Garg, Hajiabadi, Ostrovsky, TCC 2020] improved the receiver communication to a linear number of group elements for a single string-OT. However, most applications of rate-1 OT require executing it multiple times, resulting in large communication costs for the receiver.In this work, we introduce a new technique for amortizing the cost of multiple rate-1 OTs. Specifically, based on standard pairing assumptions, we obtain a two-message rate-1 OT protocol for which the amortized cost per string-OT is asymptotically reduced to only four group elements. Our results lead to significant communication improvements in PSI and PIR, special cases of SFE for branching programs.1.PIR: We obtain a rate-1 PIR scheme with client communication cost ofgroup elements for security parameterand database sizeN. Notably, after a one-time setup (or one PIR instance), any following PIR instance only requires communication costnumber of group elements.2.PSI with unbalanced inputs: We apply our techniques to private set intersection with unbalanced set sizes (where the receiver has a smaller set) and achieve receiver communication ofgroup elements wherem,Nare the sizes of the receiver and sender sets, respectively. Similarly, after a one-time setup (or one PSI instance), any following PSI instance only requires communication costnumber of group elements. All previous sublinear-communication non-FHE based PSI protocols for the above unbalanced setting were also based on rate-1 OT, but incurred at leastgroup elements.
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DOI:
10.1007/978-3-030-64375-1_3
发表时间:
2020
期刊:
IACR Cryptol. ePrint Arch.
影响因子:
--
作者:
Zvika Brakerski;P. Branco;Nico Döttling;Sanjam Garg;Giulio Malavolta
通讯作者:
Giulio Malavolta
DOI:
10.1007/978-3-030-26954-8_22
发表时间:
2019
期刊:
Graduate Studies in Mathematics
影响因子:
--
作者:
Alex Lombardi;Willy Quach;Ron D. Rothblum;Daniel Wichs;David J. Wu
通讯作者:
David J. Wu
DOI:
10.1007/978-3-662-53018-4_19
发表时间:
2016-08
期刊:
IACR Cryptol. ePrint Arch.
影响因子:
--
作者:
Elette Boyle;N. Gilboa;Yuval Ishai
通讯作者:
Elette Boyle;N. Gilboa;Yuval Ishai
DOI:
10.1007/978-3-030-17659-4_2
发表时间:
2019
期刊:
Theor. Comput. Sci.
影响因子:
--
作者:
Sanjam Garg;Romain Gay;Mohammad Hajiabadi
通讯作者:
Mohammad Hajiabadi
DOI:
10.1007/978-3-030-56784-2_18
发表时间:
2020
期刊:
CRYPTO
影响因子:
--
作者:
Goyal, Risha;Vusirikala, Satyanarayana;Waters, Brent
通讯作者:
Waters, Brent