Improving Practical UC-Secure Commitments based on the DDH Assumption

Eiichiro Fujisaki

Paper 2016/656

Improving Practical UC-Secure Commitments based on the DDH Assumption

Eiichiro Fujisaki

Abstract

At Eurocrypt 2011, Lindell presented practical static and adaptively UC-secure commitment schemes based on the DDH assumption. Later, Blazy {\etal} (at ACNS 2013) improved the efficiency of the Lindell's commitment schemes. In this paper, we present static and adaptively UC-secure commitment schemes based on the same assumption and further improve the communication and computational complexity, as well as the size of the common reference string.

Note: This is an extended abstract of the paper with the same title that appears in SCN 2016.

Metadata

Available format(s): PDF
Category: Cryptographic protocols
Publication info: Published elsewhere. Minor revision. SCN 2016
Keywords: universally composable commitments adaptive security and public-key cryptography
Contact author(s): eiichiro fujisaki @ gmail com
History: 2016-06-28: received
Short URL: https://ia.cr/2016/656
License: CC BY

BibTeX

@misc{cryptoeprint:2016/656,
      author = {Eiichiro Fujisaki},
      title = {Improving Practical {UC}-Secure Commitments based on the {DDH} Assumption},
      howpublished = {Cryptology {ePrint} Archive, Paper 2016/656},
      year = {2016},
      url = {https://eprint.iacr.org/2016/656}
}