Suggested NSIS Feature
 

I think it would be f*ing awesome if NSIS supported extracting archives with password-support

E.g
Unzip fileIn fileOut password_opt options_opt

Three reasons:
1. All of the unzip plugins I've seen are pretty large, not convenient for those who wish to minimize size of installers
2. It would standardize unzipping in NSIS, without 20+ plugins for it
3. It would satisfy those who wish to keep some of their installer files encrypted, which is pretty much impossible with current NSIS because even if you use a plugin, it's easy to see the parameters passed to it via olly. (you could implement your own basic string encryption within the nsis script to avoid people seeing the zip password in plain text by extracting the script)

Anyway, just a thought :D