More efficient oblivious transfer extensions with security for malicious adversaries

Gilad Asharov, Yehuda Lindell, Thomas Schneider, Michael Zohner

פרסום מחקרי: פרק בספר / בדוח / בכנספרסום בספר כנסביקורת עמיתים

תקציר

Oblivious transfer (OT) is one of the most fundamental primitives in cryptography and is widely used in protocols for secure two party and multi-party computation. As secure computation becomes more practical, the need for practical large scale oblivious transfer protocols is becoming more evident. Oblivious transfer extensions are protocols that enable a relatively small number of “base-OTs” to be utilized to compute a very large number of OTs at low cost. In the semi-honest setting, Ishai et al. (CRYPTO 2003) presented an OT extension protocol for which the cost of each OT (beyond the base-OTs) is just a few hash function operations. In the malicious setting, Nielsen et al. (CRYPTO 2012) presented an efficient OT extension protocol for the setting of active adversaries, that is secure in the random oracle model. In this work, we present an OT extension protocol for the setting of malicious adversaries that is more efficient and uses less communication than previous works. In addition, our protocol can be proven secure in both the random oracle model, and in the standard model with a type of correlation robustness. Given the importance of OT in many secure computation protocols, increasing the efficiency of OT extensions is another important step forward to making secure computation practical.

שפה מקוריתאנגלית
כותר פרסום המארחAdvances in Cryptology – EUROCRYPT 2015 - 34th Annual International Conference on the Theory and Applications of Cryptographic Techniques, Proceedings
עורכיםMarc Fischlin, Elisabeth Oswald
מוציא לאורSpringer Verlag
עמודים673-701
מספר עמודים29
מסת"ב (מודפס)9783662467992
מזהי עצם דיגיטלי (DOIs)
סטטוס פרסוםפורסם - 2015
אירוע34th Annual International Conference on the Theory and Applications of Cryptographic Techniques, Eurocrypt 2015 - Sofia, בולגריה
משך הזמן: 26 אפר׳ 201530 אפר׳ 2015

סדרות פרסומים

שםLecture Notes in Computer Science (including subseries Lecture Notes in Artificial Intelligence and Lecture Notes in Bioinformatics)
כרך9056

כנס

כנס34th Annual International Conference on the Theory and Applications of Cryptographic Techniques, Eurocrypt 2015
מדינה/אזורבולגריה
עירSofia
תקופה26/04/1530/04/15

ASJC Scopus subject areas

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