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Paper:

TR15-106 | 22nd June 2015 11:02

Coin Flipping of Any Constant Bias Implies One-Way Functions

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TR15-106
Authors: Itay Berman, Iftach Haitner, Aris Tentes
Publication: 23rd June 2015 21:57
Downloads: 487
Keywords: 


Abstract:

We show that the existence of a coin-flipping protocol safe against any non-trivial constant bias (e.g., $.499$) implies the existence of one-way functions. This improves upon a recent result of Haitner and Omri [FOCS '11], who proved this implication for protocols with bias $\frac{\sqrt2 -1}2 - o(1) \approx .207$. Unlike the result of Haitner and Omri, our result also holds for weak coin-flipping protocols.



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