Not when creating new archive, but on existing archive. I would also like to know how to do that in other archiver.
You can do it by using this method . Tools > Convert Archives > Compression > General > Set Password > then click ok and save . :)
This is not possible as the password is generally used as the hash/similar for the file, so, anything that changes it will require an intensive operation to change all files.
The fastest and easiest thing by far is to extract all files and create a new archive with the security set.
Not saying it isn't possible to do what you want, but I haven't seen the option to do it.
There is a better way of doing it. go to Options>Settings>Compression>Create Default>Set Password>Then click Ok and you're done! (At least it's easier to navigate.)