CyclicSRP - A Multivariate Encryption Scheme with a Partially Cyclic Public Key

• DUONG Dung Hoang

  Institute of Mathematics for Industry, Kyushu University

• PETZOLDT Albrecht

  National Institute of Standards and Technology

• TAKAGI Tsuyoshi

  Institute of Mathematics for Industry, Kyushu University

抄録

Multivariate Public Key Cryptography (MPKC) is one of the main candidates for secure communication in a post-quantum era. Recently, Yasuda and Sakurai proposed at ICICS 2015 a new multivariate encryption scheme called SRP, which offers efficient decryption, a small blow up factor between plaintext and ciphertext and resists all known attacks against multivariate schemes. However, similar to other MPKC schemes, the key sizes of SRP are quite large. In this paper we propose a technique to reduce the key size of the SRP scheme, which enables us to reduce the size of the public key by up to 54%. Furthermore, we can use the additional structure in the public key polynomials to speed up the encryption process of the scheme by up to 50%. We show by experiments that our modifications do not weaken the security of the scheme.

収録刊行物

• IEICE Transactions on Fundamentals of Electronics, Communications and Computer Sciences

  IEICE Transactions on Fundamentals of Electronics, Communications and Computer Sciences E100.A (12), 2691-2698, 2017

  一般社団法人 電子情報通信学会

キーワード

• multivariate cryptography
• SRP encryption scheme
• key size reduction
• efficiency

詳細情報

• CRID: 1390001206314911488
• NII論文ID: 130006236517
• DOI: 10.1587/transfun.e100.a.2691
• ISSN: 17451337
• ISSN: 09168508
• Web Site: https://www.jstage.jst.go.jp/article/transfun/E100.A/12/E100.A_2691/_pdf
• 本文言語コード: en
• データソース種別:
  • JaLC
  • Crossref
  • CiNii Articles
  • KAKEN
• 抄録ライセンスフラグ: 使用不可