idf.py encrypted-app-flash

[fary_young]

Hello!

Is the binary file that burned with the command-"idf.py encrypted-app-flash" an encrypted binary file or an unencrypted binary file?
In other words, is "idf.py encrypted-app-flash" a means of external artificial encryption or internal chip encryption?

Thank you!

[WiFive]

Internal, but only works if disable dl encrypt efuse is not set