A Privacy Protection Method of Lightweight Nodes in Blockchain

Aiming at the privacy protection of lightweight nodes based on Bloom filters in blockchain, this paper proposes a new method. Considering superimposition effect query information, node and filter are regarded as two parties game. A mechanism mixed strategy Nash equilibrium is proposed to judge information query. On basis, algorithm when probability privacy, not being leaked, less than protection. It variable factor disturbance, adjusting number bits’ set 1 improve performance different scenarios. The experiment uses Bitcoin transaction data from 2009 2019 test verify effectiveness, reliability, superiority