{"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":"Adopting Forward-secure keys: Block producers use dynamically updated keys when generating blocks, making  it difficult for attackers to acquire enough power to tamper with the blockchain."}]}],"pr":"7fd0bce295b655afbc7315dd4c308baedff1a89d85018106831ec7beefd18d0b"}