Sorry for jumping in, but I wonder if someone could clarify something for me. If the printed chuzz is scanned, is the OP using text recognition software to create a file or is it scanning, as in creating a jpeg, bmp etc.?

A related question (and I know that this would be an absolute PITA) - if I sat down with a hex editor, reproduced the chuzz and saved it as the original encrypted file (with the same extension), why couldn't that be decrypted? I know next to nothing about blowfish etc., so there might be something very obvious that I'm missing. For instance, I know that a MD5 hash can't be used to recreate the file that created it.