You state that, “There is cracking software for 7-Zip which allows me to crack an archive (with any key-length) in under 60 minutes.” That is a remarkable claim requiring remarkable proof! Would you mind demonstrating this, as you apparently did with a BCA file? I don’t ask this to be contentious or as a personal challenge. I’ve read of vulnerabilities with 7Zip but you are describing encryption that is essentially worthless.
Here is an encrypted 7z file —->> https://1drv.ms/u/s!AgVhuW8u-GbEhFAZrZ7GTyIzKomL