Privacy-Enhanced Intrusion Detection and Defense for Cyber-Physical Systems: A Deep Reinforcement Learning Approach

Table 1

Main symbols and meanings.

Symbol	Meaning
CPS	Cyber-physical systems
IDD	Intrusion detection and defense
GCN	Graph convolutional network
VGAE	Variational graph autoencoders
TD3	Twin delayed deep deterministic policy gradient
	Actor network
	Target actor network
	Critic network
	Target critic network
	Learning rate