MasterKey & Slabak
MasterKey MasterKey
Slabak Slabak
MasterKey MasterKey
Hey Slabak, I found a weird encryption that mixes XOR with a prime‑based key schedule, mind if we dissect it together?
Slabak Slabak
Sure, let's pry apart that XOR‑prime puzzle. What’s the first oddity you spotted?
MasterKey MasterKey
The first oddity is that the key isn’t a fixed block at all – it grows with each prime. After a few steps the XOR mask runs out of pattern and just keeps expanding, so the data never gets a repeating XOR cycle.
Slabak Slabak
So the key is like a growing sequence of prime offsets, never looping. That makes the cipher a one‑time pad in disguise, but with a deterministic generator that never repeats. It’s elegant in its own chaotic way, but also dangerous if the prime list isn’t truly random. What’s the next layer?
MasterKey MasterKey
Next layer is a simple substitution that runs in tandem with the XOR‑prime stream; each byte is first XORed with the growing prime mask, then each resulting byte is shifted by a fixed key and finally passed through a small S‑box that’s only a lookup table. It adds a second, deterministic diffusion step on top of the expanding XOR mask.