Whitenoise密碼Wu破譯方法的分析與改進(jìn)
Analysis and Improvment of the Wu Breaking Algorithm for the Cipher Whitenoise
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摘要: Whitenoise是由BSB Utilities公司提出的一個(gè)序列密碼算法。Wu在2003年8月巧妙地給出了破譯Whitenoise算法的一個(gè)解方程組方法。該文對(duì)Wu的破譯算法進(jìn)行了深入分析, 證明了Wu方法的兩個(gè)基本假設(shè)是錯(cuò)誤的, 因而Wu的方法不可能求出正確密鑰。此外, 該文還對(duì)Wu的破譯方法進(jìn)行了改進(jìn), 給出了求解Whitenoise密碼的秘密整數(shù)和秘密素?cái)?shù)的方法, 并給出了對(duì)Whitenoise密碼的一個(gè)預(yù)測(cè)攻擊方法, 利用該方法可由其前80445個(gè)亂數(shù)求出其任一時(shí)刻的亂數(shù)。此外, 該文還給出了求出其全部秘密要素的一個(gè)思路。
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關(guān)鍵詞:
- Whitenoise序列密碼;密碼分析;預(yù)測(cè)攻擊;等效密鑰
Abstract: Whitenoise is a stream cipher proposed by the BSB Utilities Inc. In August 2003, Wu Hongjun proposed a breaking algorithm for Whitenoise. In this paper, the authors make an in-depth analysis for Wus breaking algorithm, and prove that the basic hypotheses of Wu are wrong, and that Wus algorithm can not find the correct key of Whitenoise. Furthermore, Wus algorithm is improved and a method obtaining the secret integer and the secret prime numbers is given. A forecast attack to Whitenoise is proposed, with which one can obtain signal for each clock. Furthermore, a think to obtain all the equivalent secret factors is given. -
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