Security Analysis of the Khudra Lightweight Cryptosystem in the Vehicular Ad-hoc Networks

Security Analysis of the Khudra Lightweight Cryptosystem in the Vehicular Ad-hoc Networks
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车载自组织网络中Khudra轻量级密码系统的安全分析

DOI:
10.3837/tiis.2018.07.023
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发表时间:
2018-07
影响因子:
1.5
通讯作者:
Zhiqiang Liu
Zhiqiang Liu
中科院分区:
计算机科学4区
文献类型:
--
作者:
Wei Li;Chenyu Ge;Dawu Gu;Linfeng Liao;Zhiyong Gao;Xiujin Shi;Ting Lu;Ya Liu;Zhiqiang Liu

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随着无线技术的发展,车载自组织网络(VANET)作为实现智能城市和解决道路安全、便利和效率等许多重要交通问题的一种有希望的方式正在兴起。为了实现数据的机密性、完整性和认证性,应用轻量级密码体制被广泛认为是车载电子设备的一种相当有效的方法。Khudra密码是一种典型的广义Feistel网络的轻量级密码体制,支持80位密钥。到目前为止,很少有故障分析的研究致力于攻击Khudra。在面向单字节故障模型的基础上,提出了Khudra的差动故障分析方法。该攻击只需引入2个错误即可恢复其80位密钥。本文的研究结果将为车载电子设备中其他轻量级密码的安全性评估提供重要的参考。
With the enlargement of wireless technology, vehicular ad-hoc networks (VANETs) are rising as a hopeful way to realize smart cities and address a lot of vital transportation problems such as road security, convenience, and efficiency. To achieve data confidentiality, integrity and authentication applying lightweight cryptosystems is widely recognized as a rather efficient approach for the VANETs. The Khudra cipher is such a lightweight cryptosystem with a typical Generalized Feistel Network, and supports 80-bit secret key. Up to now, little research of fault analysis has been devoted to attacking Khudra. On the basis of the single nibble-oriented fault model, we propose a differential fault analysis on Khudra. The attack can recover its 80-bit secret key by introducing only 2 faults. The results in this study will provides vital references for the security evaluations of other lightweight ciphers in the VANETs.
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