Image Encryption with Discrete Fractional Cosine Transform and Chaos

摘要：

We present a new method for image encryption with discrete factional cosine transform (DFrCT) and chaos. DFrCT holds the particular properties which the conventional discrete cosine transform (DCT) hasnt, that is its fraction. Chaos functions have extreme sensitivity to the initial conditions. Logistic map is a simple equation of chaos functions. XOR is first operated between the original image and logistic map. Then the chaotic image is transformed with DFrCT two times using different keys successively by rows and by columns. Based on this method, the image can encrypted effectively, also, the transmission of the encrypted image with DFrCT and chaos is faster than with fractional Fourier transform (DFrFT) and chaos. The computer simulations are presented to verify the validity of the proposed method, such as the mean square error (MSE) between the original images and the decrypted images.

关键词： image encryption discrete fractional cosine transform discrete fractional Fourier transform chaos

作者: Lin Zhang Jianhua Wu Nanrun Zhou

作者单位: Department of Electronic Information Engineering Nanchang University Nanchang 330031,China

会议类型: 国际会议

会议名称: The Fifth International Conference on Information Assurance and Security(第五届信息保障与安全国际会议)

会议地点: 西安

会议语种:英文

页码: 61-64

在线出版日期: 2009-08-18（万方平台首次上网日期，不代表论文的发表时间）