{"p":"can-20","op":"mint","tick":"can","amt":"1000","rows":[{"df":"qa","content":[{"q":"How is the communication between etcd and validator in a blockchain ensured to be secure?","a":"When etcd sends data to a validator, it uses digital signature technology to sign  the data. The validator then verifies the signature upon receiving the data, ensuring the data's integrity and reliability of its source."}]}],"pr":"207c5cf6f078ce194bfeffd99c83bc40e75807cd4f212cbea16d6ec50afe4721"}