Strengthening the security of distributed oblivious transfer

K. Y. Cheong, Takeshi Koshiba, Shohei Nishiyama

研究成果: Conference contribution

4 引用 (Scopus)

抜粋

We study the distributed oblivious transfer first proposed by Naor and Pinkas in ASIACRYPT 2000, and generalized by Blundo et al. originally in SAC 2002 and Nikov et al. in INDOCRYPT 2002. One major objective of distributed oblivious transfer is to achieve information theoretic security under specified conditions through the distribution of the functions of traditional oblivious transfer to a set of neutral parties. In this paper we revise the definition of distributed oblivious transfer in order to deal with stronger adversaries and clarify possible ambiguities. Under the new definition, we observe some impossibility results and derive the upper bounds for the system parameters (with respect to the size of coalition). The weak points of previously proposed schemes based on threshold secret sharing schemes using polynomial interpolation are reviewed and resolved. We generalize the results and prove that, by adjusting some technical details, a previous scheme proposed by Nikov et al. is unconditionally secure. This protocol is efficient and achieves the parameter bounds at the same time.

元の言語English
ホスト出版物のタイトルInformation Security and Privacy - 14th Australasian Conference, ACISP 2009, Proceedings
ページ377-388
ページ数12
DOI
出版物ステータスPublished - 2009 11 9
外部発表Yes
イベント14th Australasian Conference on Information Security and Privacy, ACISP 2009 - Brisbane, QLD, Australia
継続期間: 2009 7 12009 7 3

出版物シリーズ

名前Lecture Notes in Computer Science (including subseries Lecture Notes in Artificial Intelligence and Lecture Notes in Bioinformatics)
5594 LNCS
ISSN(印刷物)0302-9743
ISSN(電子版)1611-3349

Other

Other14th Australasian Conference on Information Security and Privacy, ACISP 2009
Australia
Brisbane, QLD
期間09/7/109/7/3

ASJC Scopus subject areas

  • Theoretical Computer Science
  • Computer Science(all)

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  • これを引用

    Cheong, K. Y., Koshiba, T., & Nishiyama, S. (2009). Strengthening the security of distributed oblivious transfer. : Information Security and Privacy - 14th Australasian Conference, ACISP 2009, Proceedings (pp. 377-388). (Lecture Notes in Computer Science (including subseries Lecture Notes in Artificial Intelligence and Lecture Notes in Bioinformatics); 巻数 5594 LNCS). https://doi.org/10.1007/978-3-642-02620-1_26