to make it short in English langauge.

a strange man approached a kid and told him to come quickly with him. something had happened at home. and he will get him there. The boy asked the guy about the PASSWORD. The stranger did of course not know it and in the confusion the kid could get away and ran to his mother.

maybe -you- should do it as well? arrange for a password that also the parents would tell a person who is supposed to come in an emergency?