[mantrax4]

It's typical for crypto algorithms to generate an endless (or extremely large) "keystream" by permutating a much shorter secret key with other data somehow.

The fact they're not using the term "keystream" for this concept is a bit of a warning that they might've reinvented something every cipher algo already does, but more inefficient (from skimming through the paper).

Just guessing though. Not judging. I'm not a cryptographer, I just read about crypto as a hobby (and to know what I'm doing while using someone else's crypto primitives in my code).