LBlock算法的相關(guān)密鑰不可能飛來去器分析
發(fā)布時間:2018-09-05 19:51
【摘要】:研究了相關(guān)密鑰不可能飛來去器分析方法及輕量級分組密碼算法LBlock在該分析方法下的安全性。將不可能飛來去器分析方法和相關(guān)密鑰分析方法相結(jié)合,針對22輪LBlock給出了新的攻擊。構(gòu)造了15輪的相關(guān)密鑰不可能飛來去器區(qū)分器,通過向前擴展3輪,向后擴展4輪,成功攻擊了22輪LBlock。該攻擊的數(shù)據(jù)復雜度僅為2~(51.3)個明文,計算復雜度為2~(71.54)次22輪加密。與已有結(jié)果相比,攻擊的數(shù)據(jù)復雜度和計算復雜度均有明顯下降。
[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】: 西安電子科技大學綜合業(yè)務(wù)網(wǎng)理論及關(guān)鍵技術(shù)國家重點實驗室;
【基金】:國家自然科學基金資助項目(No.61373170,No.U0835004,No.U1536202) 國家111創(chuàng)新引智基金資助項目(No.B08038)~~
【分類號】:TN918.1
本文編號:2225296
[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】: 西安電子科技大學綜合業(yè)務(wù)網(wǎng)理論及關(guān)鍵技術(shù)國家重點實驗室;
【基金】:國家自然科學基金資助項目(No.61373170,No.U0835004,No.U1536202) 國家111創(chuàng)新引智基金資助項目(No.B08038)~~
【分類號】:TN918.1
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相關(guān)期刊論文 前2條
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];計算機研究與發(fā)展;2014年07期
2 ;[J];;年期
,本文編號:2225296
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