【摘要】：針對(duì)標(biāo)準(zhǔn)相關(guān)性能量分析(CPA)在旁路攻擊中存在的運(yùn)算時(shí)間長(zhǎng)、搜索空間大等問題,在分析了功耗泄露信息與數(shù)據(jù)相關(guān)性的基礎(chǔ)上,結(jié)合標(biāo)準(zhǔn)相關(guān)性分析方法,提出一種基于密鑰差異位的改進(jìn)相關(guān)性分析方法。該方法利用加密密鑰同猜測(cè)密鑰差異位與猜測(cè)密鑰同實(shí)際能量消耗間的相關(guān)系數(shù)反比映射這一特征,在給定一個(gè)密鑰假設(shè)的情況下,通過逐位改變0、1取值進(jìn)行相關(guān)性計(jì)算獲取正確密鑰;在搭建實(shí)驗(yàn)平臺(tái)上,針對(duì)AES首輪首字節(jié)加密實(shí)現(xiàn)對(duì)改進(jìn)前后的相關(guān)性分析方法分別進(jìn)行攻擊實(shí)驗(yàn)。對(duì)比表明新方法在破解密鑰的基礎(chǔ)上成功將密鑰搜索空間由原來28成功降至9。
[Abstract]:In order to solve the problems of long operation time and large search space of (CPA) in Bypass attack, this paper analyzes the correlation between power dissipation information and data, and combines the standard correlation analysis method. An improved correlation analysis method based on key difference is proposed. This method utilizes the feature that the encryption key is mapped inversely to the correlation coefficient between the key difference and the actual energy consumption, and given a key assumption, The correct key is obtained by changing the value of 0 ~ 1 bit by bit to calculate the correlation. Based on the experimental platform, the correlation analysis method before and after the improvement of the first round of AES first-byte encryption is tested separately. The comparison shows that the new method successfully reduces the key search space from 28 to 9.
【作者單位】： 軍械工程學(xué)院信息工程系;中國(guó)衛(wèi)星海上測(cè)控部實(shí)驗(yàn)技術(shù)部;
【基金】：國(guó)家自然科學(xué)基金資助項(xiàng)目(51377170) 河北省自然科學(xué)基金資助項(xiàng)目(F2012506008)
【分類號(hào)】：TN918.4
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本文編號(hào)：2328636