Thank you for understanding a little more about our paper. Also, I totally agree with the reviewer's comments about the skepticism of readers. Accordingly, the legal considerations specified in the first review have been added to the text. Its contents are as follows. “… In Korea, disease-related smart city services are legally sanctioned to be used only when necessary to protect personal information.”
From the additional explanations in the text, I understand that the idea is to track the movements of everyone and then use that information to trace back the contacts of confirmed infected patients. I stand by my position that the feasibility/ethical aspects should be discussed, at least from a social acceptance or a legal point of view, as the reader is left skeptical about whether it can actually be done with the current explanations. The authors bring up interesting legal considerations in their response to my comments, it would be nice to have them in the paper to show the reader under which conditions the authors' solution can be used.