[1.2.281] You should care about the new versioning system!

There's ought to be something going on.
How did Nexon check if the WZ file is on the correct version 1:1 of the server's?

If they want to keep it similar to current methods, they'd just have to add a table of .wz versions in Base.wz or something. If base.wz checks out (with current program version), and the numbers correctly decrypt the other wz files, then it must be right.

That's only in terms of making sure the client has the right files. To protect against wz editing they'd need to do a more thorough check.