On the composability of statistically secure random oblivious transfer

Rafael Dowsley, Jörn Müller-Quade, Anderson C.A. Nascimento

Research output: Contribution to journalArticleResearchpeer-review

Abstract

We show that random oblivious transfer protocols that are statistically secure according to a definition based on a list of information-theoretical properties are also statistically universally composable. That is, they are simulatable secure with an unlimited adversary, an unlimited simulator, and an unlimited environment machine. Our result implies that several previous oblivious transfer protocols in the literature that were proven secure under weaker, non-composable definitions of security can actually be used in arbitrary statistically secure applications without lowering the security.

Original languageEnglish
Number of pages12
JournalEntropy
Volume22
Issue number1
DOIs
Publication statusPublished - 16 Jan 2020
Externally publishedYes

Keywords

  • Random oblivious transfer
  • Unconditional security
  • Universal composability

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