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本文提出了两个新的流密码多步法快速相关攻击算法.第一个算法适用于噪音不是很大,而攻击者只有很少预计算资源的环境.第二个算法适用于高噪音而只能获得有限密钥流的场合.新算法均适用于任何形式的LFSR,并在所考虑情况下优于以前的结果.作为应用,本文分别给出一级蓝牙流密码E0和LILI-128新的密钥恢复攻击.给定237比特密钥流和228字节存储空间,针对一级蓝牙流密码E0的新攻击可以在235.1次操作中完成.给定224比特密钥流和224.5字节存储,针对LILI-128的新攻击复杂度为270.6次操作.
In this paper, two new stream cipher multi-step fast correlation attack algorithms are proposed. The first algorithm is suitable for environments where the noise is not very large and the attacker has few pre-computation resources. The second algorithm is suitable for high-noise Can obtain the limited key stream occasion.The new algorithm is suitable for any form of LFSR, and in considering the case is better than the previous results.As an application, this paper respectively gives a new Bluetooth stream cipher E0 and LILI-128 new Key Recovery Attack Given a 237-bit keystream and 228 bytes of storage space, a new attack on the primary Bluetooth stream password E0 can be completed in 235.1 operations Given a 224-bit keystream and 224.5 bytes of storage, The new attack complexity for LILI-128 is 270.6 operations.