Thing is that using common sense will reveal that this patent is restrictive in a bad way since it helps potential attackers to get into system. No matter if it

Thing is that using common sense will reveal that this patent is restrictive in a bad way since it helps potential attackers to get into system. No matter if it's year 1980 or 2000. When Volvo invited three-point seat belt it was shared with other manufacturers because they were well aware the obvious benefit to all. Same goes eg. with blocking simple passwords.