Well, i just trying to do something to protect my persistence login and i found the way to do it, ex:
1. make your login with root using toor pw
2. open this file with any text editor like nano “/lib/live/config/0031-root-password” , just comment this line with put # at the beginning of the line:
usermod -p “X014elvznJq7E’ root
3. use “passwd root” to change your root password
4. restart and test 🙂