Abstract: A visual security assessment method is presented. Video quality assessment and visual security assessment are compared. Method of structural distortion is introduced from the theory of structural similarity. Cryptograph images of encrypted video sequences are analyzed by using its structural distortion value. Visual security is assessed with objective methods and algorithms. Simulation results show that this approach provides objective assessment, effective speed and good performance at the same time.

Key words: video encryption, visual security, structural distortion, security assessment

摘要： 提出视觉保密性的概念，分析视频质量评价和视觉保密性评价的不同，根据结构相似度理论得到基于结构失真度的评价方法，从结构失真的角度分析视频密文直接解码后得到的密文图像，以客观的评测方法和指标评价视频信息的视觉保密性，并给出评价算法及实验数据。实验结果表明，该评价方法客观、高效、区分度好。

关键词: 视频加密, 视觉保密性, 结构失真度, 保密性评价

CLC Number: 

• TP309