Comment by rendx

There is https://github.com/kriswebdev/cryptsetup-deluks: "The DeLUKS header is designed to be indistinguishible from random data."

And also volumes by the quite popular TrueCrypt and its successor VeraCrypt have random headers... https://www.raedts.biz/forensics/detecting-truecrypt-veracry...

Looks like a nice enough project, but be careful with claims like "first".