Universally Composable Commitments

@inproceedings{Canetti2001UniversallyCC,
  title={Universally Composable Commitments},
  author={Ran Canetti and Marc Fischlin},
  booktitle={CRYPTO},
  year={2001}
}
We propose a new security measure for commitment protocols, called Universally Composable (UC) Commitment. The measure guarantees that commitment protocols behave like an “ideal commitment service,” even when concurrently composed with an arbitrary set of protocols. This is a strong guarantee: it implies that security is maintained even when an unbounded number of copies of the scheme are running concurrently, it implies non-malleability (not only with respect to other copies of the same… CONTINUE READING
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