A farmer fed his chicken on the night before slaughtering it and said unconsciously: "Eat quickly, this is your last meal!"
The next day, he found the chicken lying dead with a note: "I've already taken rat poison, you can't eat me now. My mother isn't someone to be messed with either."
Once the opponent knows your decision, they can make the most beneficial decision for themselves. —— Nash Equilibrium Theory
Therefore, keeping secrets and information security is very important.