Design and analysis of fast provably secure public-key cryptosystems based on a modular squaring

Mototsugu Nishioka, Hisayoshi Satoh, Kouichi Sakurai

Research output: Chapter in Book/Report/Conference proceedingConference contribution

12 Citations (Scopus)

Abstract

We design a provably secure public-key encryption scheme based on modular squaring (Rabin’s public-key encryption scheme [28]) over ZN, where N = pdq (p and q are prime integers, and d > 1), and we show that this scheme is extremely faster than the existing provably secure schemes. Security of our scheme is enhanced by the original OAEP padding scheme [3]. While Boneh presents two padding schemes that are simplified OAEP, and applies them to design provably secure Rabin-based schemes (Rabin-SAEP, Rabin-SAEP+), no previous works explores Rabin-OAEP. We gives the exact argument of security of our OAEP-based scheme. For speeding up our scheme, we develop a new technique of fast decryption, which is a modification of Takagi’s method for RSA-type scheme with N = pdq [31]. Takagi’s method uses Chinese Remainder Theorem (CRT), whereas our decryption requires no CRTlike computation. We also compare our scheme to existing factoringbased schemes including RSA-OAEP, Rabin-SAEP and Rabin-SAEP+. Furthermore, we consider the (future) hardness of the integer-factoring: N = pdq vs. N = pq for large size of N.

Original languageEnglish
Title of host publicationInformation Security and Cryptology - ICISC 2001 - 4th International Conference, Proceedings
EditorsKwangjo Kim
PublisherSpringer Verlag
Pages81-102
Number of pages22
ISBN (Print)3540433198, 9783540433194
DOIs
Publication statusPublished - 2002
Event4th International Conference on Information Security and Cryptology, ICISC 2001 - Seoul, Korea, Republic of
Duration: Dec 6 2001Dec 7 2001

Publication series

NameLecture Notes in Computer Science (including subseries Lecture Notes in Artificial Intelligence and Lecture Notes in Bioinformatics)
Volume2288
ISSN (Print)0302-9743
ISSN (Electronic)1611-3349

Other

Other4th International Conference on Information Security and Cryptology, ICISC 2001
CountryKorea, Republic of
CitySeoul
Period12/6/0112/7/01

All Science Journal Classification (ASJC) codes

  • Theoretical Computer Science
  • Computer Science(all)

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