An Efficient XOR Based Pixel Substitution Algorithm
Xueting Zhang, Xin Lyu, Siqi Zhou · 2019
As a kind of two-dimensional data, digital images are different from text data with large volume of data, high redundancy and strong correlation between pixels. It is hard to achieve the expected security performances when traditional encryption method is directly used to digital images. At present, the chaos-based encryption methods are widely used in image encrypting, owing to the favorable properties of chaos mapping. Aiming at the shortages of the existed chaos methods, an efficient XOR based pixel substitution algorithm(XOR-PSA) is proposed, which reduces the time consumption by substituting the pixels on the rows and columns simultaneously. The experiments show that the proposed method performs more efficient than a mainstream method without compromising the security level.