Risks with raw-key masking – The security evaluation of 2-key XCBC

Soichi Furuya, Kouichi Sakurai

研究成果: Chapter in Book/Report/Conference proceedingConference contribution

3 被引用数 (Scopus)

抄録

There are extensive researches on how CBC-MAC can be modified in order to efficiently deal with messages of arbitrary lengths. Based on the three-key construction of XCBC by Black and Rogaway, Moriai and Imai improved the scheme and proposed an optimally efficient CBC-MAC variants with two key materials, that is called 2-key XCBC. They give a proof of the security in the same manner as 3-key XCBC. In this paper, we study 2-key XCBC, and discuss the security of 2-key XCBC used with real replacement to an ideal PRP. We show (1) a forgery based on the raw-key masking technique used in 2-key XCBC for a particular instance where Even-Mansour PRP construction is used, and (2) an attack that violates the provable security of DESX construction. Therefore, the raw-key masking technique, which is the core improvement of 2-key CBC, must be avoided unless an overall implementation is considered in detail. Moreover, we discuss 2-key XCBC with two promising real block ciphers AES and Camellia and note important security consideration concerning their uses with 2-key XCBC.

本文言語英語
ホスト出版物のタイトルInformation and Communications Security - 4th International Conference, ICICS 2002, Proceedings
編集者Robert Deng, Feng Bao, Jianying Zhou, Sihan Qing
出版社Springer Verlag
ページ327-341
ページ数15
ISBN(印刷版)3540001646
DOI
出版ステータス出版済み - 2002
イベント4th International Conference on Information and Communications Security, ICICS 2002 - Singapore, シンガポール
継続期間: 12 9 200212 12 2002

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)
2513
ISSN(印刷版)0302-9743
ISSN(電子版)1611-3349

その他

その他4th International Conference on Information and Communications Security, ICICS 2002
国/地域シンガポール
CitySingapore
Period12/9/0212/12/02

All Science Journal Classification (ASJC) codes

  • 理論的コンピュータサイエンス
  • コンピュータ サイエンス(全般)

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