Hello Aliashraf,

I believe I have a good solution to this History attack (aka Costless Simulation attack) issue. While most PoS systems are relying on the so called "Weak Subjectivity" solution, this solution is purely objective. I am writing it up now and will post it here soon for everyone's review. I can't overstate the value of the feedback provided in this forum. Thanks everyone!

Regards,
Shunsai