{"p":"can-20","op":"mint","tick":"can","amt":"1000","rows":[{"df":"qa","content":[{"q":"How does etcd ensure the security of communication between nodes and the reliability of data storage in a blockchain?","a":"Authentication and authorization: etcd supports user authentication and authorization using OAuth2.0, preventing unauthorized  nodes from accessing and modifying data."}]}],"pr":"09f2842fc73026441605457046d4a91d377e5635e51c7228396cfc1dff64f259"}