Protocols for Multiparty Coin Toss With Dishonest Majority.
Amos Beimel, Eran Omri, Ilan Orlov · 2012
Abstract. Coin-tossing protocols are protocols that generate a random bit with uniform distribution. These protocols are used as a building block in many cryptographic protocols. Cleve [STOC 1986] has shown that if at least half of the parties can be malicious, then, in any r-round coin-tossing protocol, the malicious parties can cause a bias of Ω(1/r) to the bit that the honest parties output. However, for more than two t, where t is the number