| 密码学中信息摘要算法MD5的改进 |
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| 引用本文： | 林平. 密码学中信息摘要算法MD5的改进[J]. 福建建筑高等专科学校学报, 2011, 0(6): 602-603,620 |
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| 作者姓名： | 林平 |
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| 作者单位： | 福建工程学院闽台科技学院,福建福州350108 |
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| 摘 要： | 在MD5算法的基础上，针对MD5算法密文是一个32位16进制字符来表示值的特征，提出MD5改进算法，首先采用替换加密算法Md5Replace加密MD5算法密文，隐藏MD5算法密文的特征；再选定替换加密密文中某一位置插入由随机函数算法Md5Random产生定长的字符串得到最后的密文，改变了替换加密密文位数，隐藏了替换加密算法替换规律。在不改变算法效率的前提下，提高算法安全强度。
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| 关 键 词： | MD5算法 替换加密算法 随机函数算法 MD5_improve算法 |
The improvement of cryptography MD5 algorithm |
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| Lin Ping. The improvement of cryptography MD5 algorithm[J]. Journal of Fujian College of Architecture & C.E., 2011, 0(6): 602-603,620 |
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| Authors: | Lin Ping |
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| Affiliation: | Lin Ping (Mintai College of Science and Technology, Fujian University of Technology, Fuzhou 350108, China) |
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| Abstract: | An improved MD5 algorithm was presented based on cryptography MD5 algorithm in which a value＇s characteristic is represented by a 32-digit 16-hexadecimal character string. MD5 eneryption algorithm was replaced by Md5Replace encryption algorithm which hides MD5 ciphertext character. A substitute position in a cipher ciphertext was selected to insert a fixed-length string generated by random function algorithm Md5Random to obtain the final eiphertext. The encrypted ciphertext digits were changed with the eneryption algorithm substitution rules being hiden. The results indicate that the security of the algorithm is improved without lowering the algorithm efficiency. |
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| Keywords: | MD5 algorithm MdSReplace encryption algorithm random function algorithm MDS_improve algorithm |
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