The invention discloses a
smart power grid aggregation method and
system for
differential privacy security and
fault tolerance. The method comprises the steps that a smart electric meter records and reports the
electricity consumption of users in real time; a control center is responsible for collecting,
processing and analyzing real-time
electricity consumption data; a gateway is responsible for instruction delivery, data aggregation and security transmission between the control center and the users; a credible center is responsible for managing the whole
system, and main function modules include a
system initialization function module, a data aggregation request function module, a data aggregation request
relay function module, a user data report function module, a security data aggregation function module and an aggregated
data recovery module. According to the
smart power grid aggregation method and system, the common fault tolerant function is supported, a difference privacy
attack can be resisted, and the phenomenon that a hostile attacker exposes and obtains privacy information of the users by
eavesdropping user communication links can be resisted; when some user data are not reported successfully, the
electricity consumption of all the users with normal
data reporting can still be aggregated; the
smart power grid aggregation method and system have the high elastic expandability and can support efficient million-scale smart
power grid electricity consumption data aggregation.