Abstract: This paper introduces (k, n)-threshold visual cryptography scheme ((k, n)-VCS, for short), based on which visual cryptography scheme with trusted authority ((k, n)-TAVCS, for short) is proposed with actual application as background. Namely, under the control of secret key, any at least k images can only recover the secret image with the approval of trusted authority. It retains the merit of (k, n)-VCS. This guarantees security and satisfies the actual need simultaneously. The plan is carried on the certain analysis, and the simulation results are given.

Key words: visual cryptography, secret sharing, RSA, Arnold transformation

摘要： 介绍了(k ,n)门限可视密码分享方案((k ,n)-VCS)，在此基础上以实际应用为背景，提出了具有可信仲裁者的可视密码分享方案((k ,n)-TAVCS)。通过密钥的控制，任意至少k幅的图像必须经过可信仲裁者的认可才可恢复出秘密图像，保留了(k ,n)-VCS的优点，在确保安全性的同时满足实际应用的需要。对该方案进行了分析，给出了仿真实验的结果。

关键词: 可视密码, 秘密分享, RSA, Arnold变换

CLC Number: 

• TN918