在分布式不经意传输协议中,为便于安全性分析,通常假定所有的代理服务器都是半可信的,但如果存在某些恶意的代理服务器,将会导致接收者重构出错误的消息.针对这些恶意的代理服务器,提出了N取1的可验证分布式不经意传输方案.该方案除了具备一般形式的分布式不经意传输的特性外,还具有:接收者R可以与所有代理服务器进行交互,避免了其他方案中对门限值k的限制;接收者R能够验证所有消息的正确性,以便能够防止恶意的代理服务器通过篡改某个消息的秘密份额并监听这种篡改行为是否被发现等手段,而造成对其隐私的危害.%In distributed oblivious transfer protocol, we usually assume that all proxy servers are semi-honest, in order to facilitate security analysis. However,if some proxy servers are malicious, they can mislead the receiver to reconstruct a false item. To tackle such malicious proxy servers,we propose a 1-out-of-N verifiable distributed oblivious transfer scheme. In addition to having general form of the distributed oblivious transfer' s properties, this scheme also has following properties: the receiver R can interactively communicate with all proxy servers,which avoids the limit to the threshold k in other schemes;the receiver R is able to verify the correctness of all items in order to prevent a malicious proxy server from violating receiver' s privacy by tampering with his share of one item and observing whether or not this attack is detected by the receiver.
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