In addition to changing service management, smart devices connect people and objects around them and collect data from them on and on, in order to construct the notion of a smart city. Such data produced by embedded devices and automatically transmitted over the Internet provides people with the information to make decisions. A smart grid is one of the most popular applications for a smart city. Due to the insecurity of the wireless channels, the security of data transmission in a smart grid has become a hot issue nowadays. Many schemes for data protection have been proposed, but weaknesses exist generally. We present a new data transmission scheme for a smart grid among the smart meter (SM), the electricity utility (EU), and the trusted authority (TA). The EU can obtain the power consumption of each SM, but cannot get the real identity of the SM. To keep the privacy of the user, if the consumption value is over the threshold in special time span or identity of SM is required for public affairs, TA could track the identity in time. Formal proof with random oracle model and security analysis are expressed to show the security of the proposed scheme. Via the performance and network simulation, it is easy to see that our scheme is practical for a smart city.

中文翻译：

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智能城市理念下的智能电网匿名可跟踪身份数据传输方案

除了改变服务管理之外，智能设备还可以连接周围的人和物体，并不断地从中收集数据，以构建智能城市的概念。由嵌入式设备生成并通过Internet自动传输的此类数据为人们提供了决策所需的信息。智能电网是智能城市最受欢迎的应用之一。由于无线信道的不安全性，智能电网中数据传输的安全性已成为当今的热点问题。已经提出了许多用于数据保护的方案，但是通常存在弱点。我们为智能电表（SM），电力公司（EU）和受信机构（TA）之间的智能电网提出了一种新的数据传输方案。EU可以获取每个SM的功耗，但无法获取SM的真实身份。为了保护用户的隐私，如果在特定时间段内消费值超过阈值，或者公共事务需要SM身份，则TA可以及时跟踪身份。通过随机预言模型的形式化证明和安全性分析，证明了该方案的安全性。通过性能和网络仿真，很容易看出我们的方案对于智能城市是可行的。