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基于SHA-256和DNA序列的彩色二维码混沌加密 |
SHA-256 and DNA Sequence Based Color Two-dimensional Code Chaotic Encryption |
投稿时间:2017-01-10 修订日期:2017-01-24 |
DOI: |
中文关键词: 彩色二维码 SHA-256 混沌系统 DNA序列 加密 抗攻击 |
英文关键词: color two-dimensional code SHA-256 chaotic system encryption anti-attack |
基金项目:国家自然科学基金项目(面上项目,重点项目,重大项目),国家科技攻关计划 |
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中文摘要: |
针对彩色二维码易伪造、抗攻击能力弱、易携带病毒等问题,提出一种彩色二维码混沌加密方法。利用Lorenz混沌系统产生索引置乱二维码像素值,采用SHA-256生成加密密钥及Lorenz系统初始值。用DNA序列置换像素值矩阵,将RGB灰度矩阵合成加密彩色二维码。对本文方法的密钥空间、密钥灵敏度、信息熵、抗差分攻击、抗统计攻击和相关性进行了实验验证和分析,结果表明本文方法具有较好的伪随机性、防伪造性和抗攻击性。 |
英文摘要: |
A color two-dimensional code chaotic encryption method was proposed to solve the problems of easy forgery, weak anti-attack ability and easy carrying virus of color two-dimensional code. Our method used a Lorenz chaotic system to generate the scrambled index two-dimensional code pixel value, utilized SHA-256 to generate the encryption key and the initial value of the Lorenz . It replaced the pixel value matrix with DNA sequence and synthesized the RGB gray-scale matrix as the encrypted color two-dimensional codes.The method’s key space, key sensitivity, information entropy, anti-differential attack, anti-statistic attack and correlation were verified and analyzed. Experimental results demonstrate that our method has good pseudo-randomness, anti-forgery and anti-attack performance. |
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