Security Analysis of A Parasite Chain Attack in IOTA Based on Repeated Game

IOTA is widely used in the field of Internet of things, but it also produces a series of security problems which brings great security risks to IOTA. Starting from the perspective of parasite chain attack, we put forward the cost function of nodes successfully launching parasite chain attack. On this basis, the game relationship between nodes in IOTA is studied through repeated game theory and the strategy selection of nodes is analyzed, so as to provide a new method to further reduce parasite chain attacks.