Hi, looking to get some eyeballs on the following scheme / idea
Imagine you have a ML-KEM keypair, and a Classic McEliece keypair.
You generate a shared secret with each KEM, then the result, you XOR it together to derive a final key
This final key will be used as the key to a symmetric algorithm.
Now, I understand, XORing sounds bad, and I should use some other hashing function / HKDF.
But logically speaking, I don't see any reason. I hope I can be convinced by your answers to ditch this XOR approach, but as far as I know, it appears to be secure.