All-But-Many Lossy Trapdoor Functions under Decisional RSA Subgroup Assumption and Application

Nanyuan Cao, Zhenfu Cao*, Zhen Liu, Xiaolei Dong, Xiaopeng Zhao

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

Abstract

Lossy trapdoor functions (LTDFs) were introduced by Peikert and Waters (STOC 2008) and have a number of applications in cryptography. All-but-many lossy trapdoor functions (ABM-LTDFs) are generalizations of LTDFs studied by Hofheinz (Eurocrypt 2012). Specially, using ABM-LTDFs to construct public key encryption (PKE) scheme with selective opening security has been proven feasible. Existing ABM-LTDFs were built on pairings, lattices and decisional composite residuosity (DCR) assumption. However, pairing-based ABM-LTDFs and DCR-based ABM-LTDFs rely on non-standard assumptions. In this paper, we construct an ABM-LTDF under the decisional RSA subgroup (DRSA) assumption, and we employ it to construct PKE scheme with selective opening security. We also propose a construction of DCR-based ABM-LTDF relying on standard assumption in Appendix.

Original languageEnglish
Pages (from-to)1148-1157
Number of pages10
JournalGerontologist
Volume59
Issue number3
DOIs
StatePublished - 1 Jun 2019

Keywords

  • Lossy trapdoor function
  • decisional RSA subgroup assumption
  • decisional composite residuosity assumption
  • semi-smooth RSA subgroup modulus

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