are selected and resized to 64 64# Data . decoding networks are also designed as n FC layers connected with the weights of the last FC layer of AlexNet and ResNet18. The value of b is redetermined for AlexNet and ResNet18 via the same process in Subsection IV-A. The length t of additional data M for each receiver is set as {, ,, }, 100200 1500f and the number n {, ,}.12 3 = The results of extraction error e for AlexNet with a batch size of 50 are shown in Fig. 14(a), while the corresponding values of detection accuracies are shown in Fig. 14(b). Correspondingly, the extraction errors for ResNet18 with a batch