{"p":"can-20","op":"mint","tick":"can","amt":"1000","rows":[{"df":"qa","content":[{"q":"How do blockchain API nodes ensure the security of data?","a":"Digital signatures: API  nodes can adopt digital signature technology to sign request data, ensuring that the data is not tampered with during transmission."}]}],"pr":"29a21bb53e7b24b191b5d51ff9ca9b1589f7393976036795cb0be90c7a6027ae"}