That would be expected for encodings or container file formats. Straight-up encryption like AES produces results that are visually indistinguishable from random data.
I’d expect the greater length of the encrypted data (which should look random) vs the structured header/footer to rapidly push the Shannon entropy to the maximum
You would still expect some amount of file structure, ex byte headers or something at the beginning/end of file. no?
That would be expected for encodings or container file formats. Straight-up encryption like AES produces results that are visually indistinguishable from random data.
I’d expect the greater length of the encrypted data (which should look random) vs the structured header/footer to rapidly push the Shannon entropy to the maximum
No. Why would you? Encrypted data should look no different than random. The app figures out if it is the app's data after it attempts to decode it.
It's not?
Compare a random data from a pseudo gen, a really random data and some encrypted data. They are all different.
Either you messed up somehow or you've made a massive discovery. I assume it's the former.
If it's a CSPRNG, and decent encryption, they'll be indistinguishable from random noise.