基于三维立体分享图像的(2,2)视觉密码方案

( 2,2) visual cryptography scheme based on autostereogram sharing images

传统(2,2)视觉密码方案由于其共享图像为毫无意义的二值图像而易引起攻击者的怀疑。为此,提出了一种基于三维立体分享图像的(2,2)视觉密码方案。该方案将分享图像伪装成有意义的三维立体图,由此可较好地避免恶意攻击。而当两幅分享图像进行叠加等处理,人类视觉系统就能直接辨认出秘密信息。与其他图像加密方法的性能对比与定量评估说明,本方案在较好隐藏秘密信息的同时,具有相对较快的运算速度。正是由于该方案秘密恢复的简单性和有效性,具有广泛的应用前景。

Traditional(2,2)visual cryptography scheme can easily cause the suspicion of attackers since the sharing images are meaningless binary images.For this reason,this paper proposed a(2,2)visual cryptography scheme based on the autostereogram sharing images.The scheme disguised the sharing images as a meaningful autostereogram,so it could avoid the malicious attack.Once the two sharing images stack together,human visual system could directly recognize the secret information.The performance comparison and qualitatively evaluation with other image decryption methods demonstrate that the proposed scheme can conceal the secret information well,and keep a relatively fast speed at the same time.Because of the simplicity and effectiveness of the secret recovery,many areas can apply the scheme.