About Loss Functions and Targeted Attacks

[jimo17]

Hi and thanks for the open source. I am very interested in your paper. I have some questions.
Excuse me, does the loss function used in training the simulator and the loss function used in the simulator attack have to be the same?
Can I use a targeted attack while training the simulator and an untargeted attack while the simulator is attacking?

[machanic]

@jimo17 (1) No, they are different loss functions. The loss function used in training the simulator is the Mean-Square-Error(MSE) loss, the loss function used in attacking is the logits-difference loss or cross-entropy loss.
(2) Sorry, I don't understand what do you mean? an untargeted attack while the simulator is attacking? YES, it can do it.