{"p":"can-20","op":"mint","tick":"can","amt":"1000","rows":[{"df":"qa","content":[{"q":"What major improvements are needed in the security model of blockchain faced with long-range attacks?","a":"Introducing Weak Subjectivity mechanism: All nodes across the entire network are required to periodically check the latest blocks, and reject blocks that reorganize  records that are too old. This effectively reduces the risk of attackers creating fake chains by exploiting old records."}]}],"pr":"a4c476afb30bc5dc889213b351c119b04c1e2706f21502f4eb14a23765224d41"}