可用于团队模式的动态广播加密方案

摘要

提出一个可用于团队设计模式的动态广播加密方案.通过结合广播加密模型和无证书密码理论,利用身份作为参数,成功解决了方案中私钥泄露的问题.在该方案中每个成员均可以加密和传递设计文档,但只有指定的设计组成员可以解密被加密的文档.分析结果显示该方案在离散对数假设下是安全的,在可以承载公钥密码系统的无线传感器网络中无需额外的硬件设备,故不仅适用于传感器节点而且是其应用领域中一个引人注目的安全结论.%This paper presents a dynamic broadcast encryption scheme applicable to the collaborative design model. The new scheme uses the ID card as the parameters to successfully solve the private key eschewing problem via combining the broadcast encryption model with the certificateless cryptography theory. In this scheme, every member can encrypt and transmit the designed documents, but it is only the members in the appointed design team who can decrypt the encrypted documents. The analytical results indicate that this scheme is secure under the discrete logarithm assumption and needn't require the additional hardware equipment in the wireless sensor network under the affordable public key cryptography system, whereby this scheme is not only a node applicable to the sensor but also an attractive security conclusion in its applicable realm.