一种改进的防欺骗可视密码方案

Improved visual cryptography scheme to prevent cheaters

在VC(可视密码)的实际应用中分发者和参与者均可能存在欺骗行为,导致秘密图像无法正确恢复,基于此提出了一种改进的防欺骗可视密码方案。该方案用(2,n+1)-VCS(可视密码方案)代替(k,n)-VCS来分享验证图像,不需要引入传统的TTP(可信第三方),可同时直接验证分发者和参与者的欺骗行为,提高了可视密码方案的实用性与安全性。

Both dealer and participants were likely to cheat in the practical application of visual cryptography. In order to make sure that the secret image resuming was not impacted, this paper put forward an improved cheater detectable visual cryptography scheme. It used （2, n ＋ 1 ）-VCS instead of （k, n）-VCS to verify the cheating problems directly from both dealer and participants without introducing the trusted third party （TIP）, and improved the security and practicability of visual cryptogra- phy scheme.