Thanks for the extensive explanations. I knew about the 80 bit effective key for my situation (K1=K3). Indeed, I'm presently looking for a weakness/hints/scheme in the key, being aware that brute-force won't help.
Good to know that hashcat can cope with K1=K3. That was what I wasn't really sure of.
Good to know that hashcat can cope with K1=K3. That was what I wasn't really sure of.