TY - GEN
T1 - Cryptography from anonymity
AU - Ishai, Yuval
AU - Kushilevitz, Eyal
AU - Ostrovsky, Rafail
AU - Sahai, Amit
PY - 2006
Y1 - 2006
N2 - There is a vast body of work on implementing anonymous communication. In this paper, we study the possibility of using anonymous communication as a building block, and show that one can leverage on anonymity in a variety of cryptographic contexts. Our results go in two directions. • Feasibility. We show that anonymous communication over insecure channels can be used to implement unconditionally secure point-to-point channels, broadcast, and general multi-party protocols that remain unconditionally secure as long as less than half of the players are maliciously corrupted. • Efficiency. We show that anonymous channels can yield substantial efficiency improvements for several natural secure computation tasks. In particular, we present the first solution to the problem of private information retrieval (PIR) which can handle multiple users while being close to optimal with respect to both communication and computation.
AB - There is a vast body of work on implementing anonymous communication. In this paper, we study the possibility of using anonymous communication as a building block, and show that one can leverage on anonymity in a variety of cryptographic contexts. Our results go in two directions. • Feasibility. We show that anonymous communication over insecure channels can be used to implement unconditionally secure point-to-point channels, broadcast, and general multi-party protocols that remain unconditionally secure as long as less than half of the players are maliciously corrupted. • Efficiency. We show that anonymous channels can yield substantial efficiency improvements for several natural secure computation tasks. In particular, we present the first solution to the problem of private information retrieval (PIR) which can handle multiple users while being close to optimal with respect to both communication and computation.
UR - http://www.scopus.com/inward/record.url?scp=38049021884&partnerID=8YFLogxK
U2 - 10.1109/FOCS.2006.25
DO - 10.1109/FOCS.2006.25
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AN - SCOPUS:38049021884
SN - 0769527205
SN - 9780769527208
T3 - Proceedings - Annual IEEE Symposium on Foundations of Computer Science, FOCS
SP - 239
EP - 248
BT - 47th Annual IEEE Symposium on Foundations of Computer Science, FOCS 2006
T2 - 47th Annual IEEE Symposium on Foundations of Computer Science, FOCS 2006
Y2 - 21 October 2006 through 24 October 2006
ER -