基于可信第三方的防欺骗视觉密码分享方案

A Cheater Detectable Visual Cryptography Scheme Based on Trusted Third Party

传统的视觉密码方案需要参与者相互验证,因此存在着一系列检测过程,不够简洁、应用不够广泛等问题;基于这一点,提出了一种需要引入第三方的防欺骗视觉密码分享方案;该方案采用异或(XOR)运算,利用可信第三方和受怀疑的分享图像能否恢复出验证图像来实现真实性检验,可直接验证分发者和参与者的欺骗行为,具有方便快捷和不受存取结构限制的特点。

Problems such as complexity of the detection process and limited application troubled traditional mutual authentication scheme. Therefore,a cheater detectable visual cryptography scheme was proposed by introducing trusted third party（ TTP） whose action is guaranteed. This scheme conducted XOR operation to achieve shared authenticity test by using TTP and suspected shared images. Meanwhile,it directly verified the cheating behaviors from both dealer and participants,with characteristics such as convenience,fast speed and without limitations by the access structure.