Creating A Un-Readable Executable File

Hello World,
I Am Trying To Create A Program _{(Like Many Of You!)} That Is Unreadable To A Human, But Is Still Executable By The Computer _{(Think Microsoft).}
Is There Any Way You Guys Can Think Of Accomplishing This Goal Of Mine?

string.dump is indeed the way to go, however I feel I should mention that most things that run lua won't let you load binaries (it's a huge security concern), though CC will.
Also, all code is readable to a human with a decompiler and an abundance of spare time