智能电网容错数据聚合方案

Data Aggregation Scheme with Fault Tolerant in Smart Grid

新一代智能电网的出现,极大地提升了电网的安全性与可靠性,这依赖于智能电表每15分钟发送一次数据,但是这可能会暴露用户的隐私,同时需要消耗很大的计算代价.于是数据聚合技术被引入,大多数现有聚合方案存在耗时大且当电表故障时系统无法正常运行等问题.针对上述问题,本文提出了一个智能电网中高效的支持错误容忍的数据聚合方案,具体来说,利用了改进的对称同态加密技术达到轻量级的效果,在支持错误容忍的同时还能抵抗合谋攻击.最后,安全需求分析说明了该方案是安全的,性能评价体现了本文的高效性,这契合于资源有限的智能电表.

The new generation of smart grids has greatly improved the security and reliability of power grids, which relies on smart meters to send data every 15 minutes. However, this may expose the privacy of users and also requires a huge computation cost. As a result, data aggregation technology is introduced. Most of the existing aggregation schemes are time-consuming and the system cannot run normally when its meter fails. In response to the above problems, this study proposes an efficient data aggregation scheme with fault tolerance in smart grids. Specifically, it uses the improved symmetric homomorphic encryption technology to be lightweight. It can resist collusion attacks while supporting fault tolerance. The security requirements analysis shows that the scheme is secure, and the performance evaluation reflects the efficiency of the scheme, which fits the smart meters with limited resources.