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Breaking One-Round Key-Agreement Protocols in the Random Oracle Model
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Abstract: | In this work we deal with one-round key-agreement protocols, called Merkle's Puzzles, in the random oracle model, where the players Alice and Bob are allowed to query a random permutation oracle $n$ times. We prove that Eve can always break the protocol by querying the oracle $O(n^2)$ times. The long-time unproven optimality of the quadratic bound in the fully general, multi-round scenario has been proven recently by Barak and Mahmoody-Ghidary. The results in this paper have been found independently of their work. |
BibTeX
@misc{eprint-2008-17730, title={Breaking One-Round Key-Agreement Protocols in the Random Oracle Model}, booktitle={IACR Eprint archive}, keywords={public-key cryptography / Merkle's puzzles, key-agreement, random oracle model}, url={http://eprint.iacr.org/2008/053}, note={arxiv, cs.CC mirka@daimi.au.dk 13908 received 30 Jan 2008}, author={Miroslava Sotakova}, year=2008 }