Say you have a message and you run it through an all-or-nothing transform. A transform that requires every single block in the correct order in order to recover any data. Each block is indistinguishable from random noise. Now shuffle them using a seeded crypto RNG.
Say the transform gives you at least 34 blocks (which can be arranged in ~2^128 permutations). Can this structure be considered safe? There's no actual key involved, unless you count the RNG seed.