New assumptions on isogenous pairing groups with applications to attribute-based encryption

研究成果: Conference contribution

1 被引用数 (Scopus)

抄録

We introduce new isogeny-related assumptions called Isog-DDH and Isog-DBDH assumptions. By using the assumptions, we reinforce security of several existing (hierarchical) identity-/attribute-based encryption (HIBE/ABE) schemes. While the existing schemes are proven from the standard DBDH assumption, our reinforced secure ones have two incomparable security proofs: one is proven from the DBDH as well and another is proven from the Isog-DDH assumption which is incomparable with DBDH. As a result, if either DBDH or Isog-DDH assumption holds, the proposed HIBE/ABE schemes are secure. For obtaining our (H)IBE secure in the standard model, we assign a unique (product) group called ID-group to each (H)ID, and introduce a new proof technique, i.e., ID-group partitioning by using isogenies as trapdoors.

本文言語English
ホスト出版物のタイトルInformation Security and Cryptology – ICISC 2018 - 21st International Conference, Revised Selected Papers
編集者Kwangsu Lee
出版社Springer Verlag
ページ3-19
ページ数17
ISBN(印刷版)9783030121457
DOI
出版ステータスPublished - 2019
イベント21st International Conference on Information Security and Cryptology, ICISC 2018 - Seoul, Korea, Republic of
継続期間: 2018 11 282018 11 30

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)
11396 LNCS
ISSN(印刷版)0302-9743
ISSN(電子版)1611-3349

Other

Other21st International Conference on Information Security and Cryptology, ICISC 2018
CountryKorea, Republic of
CitySeoul
Period18/11/2818/11/30

ASJC Scopus subject areas

  • Theoretical Computer Science
  • Computer Science(all)

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