双重身份认证方法的设计与实现

Design and Realization of Dual Authentication

数字水印作为一种新型的信息隐藏技术而成为目前业界研究的热点。该文从数字水印、指纹识别等技术相结合的角度,利用数字水印的隐藏性和指纹识别的唯一性,提出了一种网络身份认证的新模型,实现了用户身份的双重认证,使得网上商业行为、资源访问等活动有了安全保障。依据此模型,详细描述了基于奇异值分解的数字水印算法,并介绍了指纹识别的过程。实验表明,该文所提出的数字水印算法在抵抗各种常规数据处理和攻击(如嵌入强度、高斯噪声、JPEG压缩、滤波、裁剪等)方面具有良好的性能。

As a new type of information - concealing technology, digital watermarking has become a focus of research in the industry. In light of the combination of the technologies of watermarking and fingerprint identification, and taking advantage of the invisibility of watermarking and the uniqueness of fingerprint identification, this thesis puts forward a new model of network authentication, thus realizing the dual authentication of users' identification. In this way, online commercial practices and resources visiting are secured. According to this model, this thesis describes in detail watermarking algorithm based on singular value decomposition and the process of fingerprint identification. Experimental results show that watermarking algorithm works well in dealing with various kinds of regular data processing and attack (such as embed intensity, Gaussian noise, JPEG - compression, filtering, cropping).