I wonder if the intentionally obtuse and custom cryptography is a form of DRM. With DRM, since the data itself isn't secret (in fact you want to decode it at t

I wonder if the intentionally obtuse and custom cryptography is a form of DRM. With DRM, since the data itself isn't secret (in fact you want to decode it at the end so you can play the media), the strength of the cryptography itself doesn't matter and the objective is to frustrate and slow down any reverse-engineering attempts, so homebrew cryptography may actually make sense here as to prevent usage of any common cryptographic libraries and force the reverse-engineers to implement it from scratch.