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高級加密標(biāo)準(zhǔn)Rijndael算法的分析及實(shí)現(xiàn)
畢業(yè)論文
高級加密標(biāo)準(zhǔn)Rijndael算法的分析及實(shí)現(xiàn)
摘要：隨著計(jì)算機(jī)和通信技術(shù)的發(fā)展，用戶對信息的安全存儲、安全處理和安全傳輸?shù)男枨笤絹碓狡惹�。隨著攻擊手段的日益提高和計(jì)算機(jī)計(jì)算速度的增長，原有的DES密碼體制由于密鑰長度太短，無法滿足需要的安全強(qiáng)度。最新的密碼體制AES具有簡潔、實(shí)現(xiàn)速度快、安全性高等優(yōu)點(diǎn)，是分組密碼加密體制的1個(gè)相當(dāng)好的標(biāo)準(zhǔn)。
本文主要對美國高級加密標(biāo)準(zhǔn)Rijndael算法進(jìn)行了比較深入的研究，包括算法的代數(shù)性質(zhì)。主要成果有:
1 對Rijndael算法進(jìn)行了詳細(xì)的介紹，包括算法的設(shè)計(jì)原理、設(shè)計(jì)原則，并對國內(nèi)外的研究現(xiàn)狀進(jìn)行了總結(jié)
2 針對AES S盒的設(shè)計(jì)特性，詳細(xì)的分析了其代數(shù)性質(zhì)，給出了S盒的 1個(gè)性質(zhì)，并發(fā)現(xiàn)了其8個(gè)布爾函數(shù)之間的等價(jià)性，為進(jìn)1步分析AES提供了理論基礎(chǔ)。
3 研究了Rijndael算法S盒、列變換及其逆運(yùn)算、整個(gè)輪變換的優(yōu)化方法，從運(yùn)算單位、數(shù)據(jù)訪問時(shí)間和簡化矩陣運(yùn)算等方面提高算法的實(shí)現(xiàn)效率。將移位寄存器實(shí)現(xiàn)高效流密碼的思想用于分組密碼Rijndael算法的實(shí)現(xiàn)，獲得與查表法相當(dāng)?shù)男省?BR>關(guān)鍵詞: 分組密碼; Rijndael算法;AES; S盒
The Analysis And Realization of Advance Encryption Stardard Rijndael Algorithmic
Abstract: With the development of the computer and communication technology, the users requirements for the informations safety storage, safety process and safety transmission are getting more and more exigent. With the improvement of attack method and computing, DES is not secure for its too short key in length. The Advanced Encryption Standard is a good cryptosystem for its simplicity, high rate and security.
This paper has a detail investigation on Rijndael, including its algebraic proper .The central contribution is as follows:
1 A detail introduction of Rijndael is presented, including the design principle and the current research result.
2 The only nonlinear part S-box is analyzed and an important algebraic property is introduced. The equivalence of eight Boolean functions is found, and it is a help to analyze AES in detail.
3 The optimisations of Rijndael Sbox, of ColumnMix and its inverse, and of the round transformation are thoroughly studied for purpose of better performance. Meanwhile, the implementation of such block cipher as Rijndael with shifting registers is designed with performance as good as that of method of table-lookup.
Keywords: Block Cipher ; Rijndael Algorithmic ; AES; S-Box;
注釋：不含源代碼
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