Paper 2008/128
A Chosen IV Attack Using Phase Shifting Equivalent Keys against DECIM v2
Hidehiko Nakagami, Ryoichi Teramura, Toshihiro Ohigashi, Hidenori Kuwakado, and Masakatu Morii
Abstract
DECIM v2 is a stream cipher submitted to the ECRYPT stream cipher project (eSTREAM) and ISO/IEC 18033-4. No attack against DECIM v2 has been proposed yet. In this paper, we propose a chosen IV attack against DECIM v2 using a new equivalent key class. Our attack can recover an $80$-bit key with a time complexity of $2^{79.90}$ when all bits of the IV are zero. This result is the best one on DECIM v2.
Metadata
- Available format(s)
-
PDF
PS
- Category
- Secret-key cryptography
- Publication info
- Published elsewhere. Unknown where it was published
- Keywords
- cryptanalysisequivalent keysstream cipherDECIM v2eSTREAM
- Contact author(s)
- mmorii @ kobe-u ac jp
- History
- 2008-04-16: revised
- 2008-03-25: received
- See all versions
- Short URL
- https://ia.cr/2008/128
- License
-
CC BY
BibTeX
@misc{cryptoeprint:2008/128,
author = {Hidehiko Nakagami and Ryoichi Teramura and Toshihiro Ohigashi and Hidenori Kuwakado and Masakatu Morii},
title = {A Chosen {IV} Attack Using Phase Shifting Equivalent Keys against {DECIM} v2},
howpublished = {Cryptology {ePrint} Archive, Paper 2008/128},
year = {2008},
url = {https://eprint.iacr.org/2008/128}
}
