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IEICE TRANSACTIONS on Information

Provable-Security Analysis of Authenticated Encryption Based on Lesamnta-LW in the Ideal Cipher Model

Shoichi HIROSE, Hidenori KUWAKADO, Hirotaka YOSHIDA

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Summary :

Hirose, Kuwakado and Yoshida proposed a nonce-based authenticated encryption scheme Lae0 based on Lesamnta-LW in 2019. Lesamnta-LW is a block-cipher-based iterated hash function included in the ISO/IEC 29192-5 lightweight hash-function standard. They also showed that Lae0 satisfies both privacy and authenticity if the underlying block cipher is a pseudorandom permutation. Unfortunately, their result implies only about 64-bit security for instantiation with the dedicated block cipher of Lesamnta-LW. In this paper, we analyze the security of Lae0 in the ideal cipher model. Our result implies about 120-bit security for instantiation with the block cipher of Lesamnta-LW.

Publication
IEICE TRANSACTIONS on Information Vol.E104-D No.11 pp.1894-1901
Publication Date
2021/11/01
Publicized
2021/07/08
Online ISSN
1745-1361
DOI
10.1587/transinf.2021NGP0008
Type of Manuscript
Special Section PAPER (Special Section on Next-generation Security Applications and Practice)
Category

Authors

Shoichi HIROSE
  University of Fukui
Hidenori KUWAKADO
  Kansai University
Hirotaka YOSHIDA
  National Institute of Advanced Industrial Science and Technology

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