【摘要】：研究了相關(guān)密鑰不可能飛來(lái)去器分析方法及輕量級(jí)分組密碼算法LBlock在該分析方法下的安全性。將不可能飛來(lái)去器分析方法和相關(guān)密鑰分析方法相結(jié)合,針對(duì)22輪LBlock給出了新的攻擊。構(gòu)造了15輪的相關(guān)密鑰不可能飛來(lái)去器區(qū)分器,通過(guò)向前擴(kuò)展3輪,向后擴(kuò)展4輪,成功攻擊了22輪LBlock。該攻擊的數(shù)據(jù)復(fù)雜度僅為2~(51.3)個(gè)明文,計(jì)算復(fù)雜度為2~(71.54)次22輪加密。與已有結(jié)果相比,攻擊的數(shù)據(jù)復(fù)雜度和計(jì)算復(fù)雜度均有明顯下降。
[Abstract]:This paper studies the method of correlative key impossible flier analysis and the security of lightweight block cipher algorithm LBlock under this method.Combining impossible flier analysis with correlative key analysis,a new attack against 22 rounds of LBlock is proposed.Fifteen rounds of correlative key impossible flier-flop discriminator are constructed. After 3 rounds of forward extension and 4 rounds of backward extension, 22 rounds of LBlock are successfully attacked. The data complexity of the attack is only 2 ~ (51.3) plaintext, and the computational complexity is 2 ~ (71.54) rounds of 22 encryption rounds.
【作者單位】： 西安電子科技大學(xué)綜合業(yè)務(wù)網(wǎng)理論及關(guān)鍵技術(shù)國(guó)家重點(diǎn)實(shí)驗(yàn)室;
【基金】：國(guó)家自然科學(xué)基金資助項(xiàng)目(No.61373170,No.U0835004,No.U1536202) 國(guó)家111創(chuàng)新引智基金資助項(xiàng)目(No.B08038)~~
【分類號(hào)】：TN918.1

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1 衛(wèi)宏儒;殷廣麗;;LBlock算法的相關(guān)密鑰不可能差分分析[J];計(jì)算機(jī)研究與發(fā)展;2014年07期

2 ;[J];;年期

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本文編號(hào)：2225296