With ItemsAdder you can protect your resourcepack from unzip and thieves.
You just have to set this option in config.yml and use /iazip again.
If you're using Dropbox don't forget to reupload the pack and update the config.yml
The enabled property allows you to protect the resourcepack with a basic method.
The extreme property allows you to protect the pack with another layer of protection to block some other methods to unzip the pack.
This is a funny meme showcase of what the user will see when they try to steal your data. But this is actually what the user will see, a group of corrupted files and folders.
There is no 100% effective way to protect resourcepack because the game must need to be able to extract it correctly to show textures.
This feature is a mitigation to avoid kids and trolls to steal your texture.
Some experienced users might be able to find a way to bypass these protections.
ItemsAdder does its best to prevent this, but keep that eventuality in mind.