基于商密算法二维码的研究与应用

发布时间：2018-11-19 20:24

【摘要】：目前各类二维码应用逐渐增多,随之而来产生了二维码信息安全性的困扰。如何保证二维码数据的安全成为了一个关键性的问题。以往通过在二维码中写入商品编号的方式进行联网数据验证已经无法保证数据安全,任何人均可以通过伪造二维码数据信息的方式来轻松仿制商用图码标签,因此需要考虑对二维码信息进行信息技术防伪,以达到难以被轻易破解和伪造的要求。本文提出一种基于商用密码技术对商品信息进行加密处理方法,使通过使用商密算法处理后的图码信息无法被普通识读器进行识别,防止其他人通过伪造数据生成加密防伪二维码。提高了二维码信息的安全性,保障了二维码数据信息的完整性与可靠性。并针对拍摄图像中二维码易出现倾斜与形变的现象进行分析,采用相关图像处理技术进行图像预处理,使经过矫正后的二维码可被更好地识读。本文主要研究内容和工作如下:1.针对因光照与拍摄角度引起的二维码发生几何形变情况进行分析,采用形态学顶帽变换去除图像阴影,并使用小波变换和光线增强来提高图像对比度,根据二维码的形状特点来删除图像中无关区域。并提出基于相似度匹配来对二维码的四个顶点进行定位,根据二维码顶点建立透视变换方程来对二维码进行矫正。提高图码识别几率。2.采用国家商用密码算法将二维码信息进行加密与计算数字签名,通过数据加密来保证二维码信息的安全性,通过数字签名来保证二维码信息来源无法伪造。并采用生成随机数编号的方式来保证加密密钥的唯一性,保证一次一密。难以被轻易破解与识读。3.根据提出的二维码信息加密处理方法设计专用的商密二维码生成与识读软件,通过与普通识读器识读效果进行对比。通过实验表明,通过本文加密方式生成的二维码难以被普通识读器正确识读,保证了信息的安全性和抗伪造能力。显示了二维码防伪应用的实用性。
[Abstract]:At present, the application of all kinds of QR codes is increasing gradually, which brings about the puzzlement of information security of QR codes. How to ensure the security of two-dimensional code data has become a key problem. In the past, online data verification by writing commodity numbers into the QR code could no longer guarantee data security. Anyone could easily copy the commercial code label by falsifying the data information of the QR code. Therefore, it is necessary to consider the anti-counterfeiting of information technology in order to achieve the requirement that it is difficult to be easily deciphered and forged. In this paper, a method of encrypting commodity information based on commercial cipher technology is proposed, which can not be recognized by common reader by using quotient encryption algorithm. Prevent others from generating encrypted anti-counterfeiting QR codes by falsifying data. The security of the two dimensional code information is improved, and the integrity and reliability of the two dimensional code data information are guaranteed. Based on the analysis of the phenomenon that the QR code is prone to incline and deformation in the photographed image, the image preprocessing technology is adopted to make the corrected QR code be read better. The main contents and work of this paper are as follows: 1. Based on the analysis of geometric deformation of two-dimensional code caused by illumination and shooting angle, morphological top hat transform is used to remove image shadow, and wavelet transform and ray enhancement are used to improve image contrast. According to the shape characteristics of the QR code, the irrelevant region in the image is deleted. Based on similarity matching, four vertices of two-dimensional code are located, and perspective transformation equation is established to correct the two dimensional code according to the vertex of two dimensional code. Increase the probability of code recognition. 2. The national commercial cipher algorithm is used to encrypt and calculate the two-dimension code information. The data encryption is used to ensure the security of the two-dimension code information, and the digital signature is used to ensure that the source of the two-dimensional code information can not be forged. The method of generating random number numbers is used to ensure the uniqueness of the encryption key and the security one at a time. Difficult to easily decipher and read. 3. According to the proposed method of encryption and processing of two-dimensional code information, a special quotient two-dimension code generation and recognition software is designed and compared with that of common reader. The experiments show that the QR code generated by the encryption method in this paper is difficult to be read correctly by the common reader, which ensures the security of information and the ability of anti-forgery. It shows the practicability of the anti-counterfeiting application of two-dimensional code.
【学位授予单位】：吉林大学
【学位级别】：硕士
【学位授予年份】：2016
【分类号】：TP391.44

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