Replay attack detection method and device in Internet of Vehicles environment

The invention provides a replay attack detection method and device in an Internet of Vehicles environment, and the method comprises the steps: taking vehicle information and network information at a plurality of moments when a vehicle passes through an Internet of Vehicles network as a data sequence, inputting the data sequence into a full connection layer, and obtaining the data sequence in a vector form; inputting the data sequence in the vector form into a bidirectional long-short term memory network model to obtain past moment characteristics and future moment characteristics of the data sequence, and overlapping the past moment characteristics and the future moment characteristics to obtain overlapped characteristics; determining each initial state of an attention mechanism according to the overlapping feature corresponding to each moment, determining the weight of each initial state by using the attention mechanism, multiplying the weight of each initial state by each initial state, and accumulating to