{"p":"can-20","op":"mint","tick":"can","amt":"1000","rows":[{"df":"qa","content":[{"q":"How can you ensure that the downloaded blockchain software binary file is secure and effective?","a":"Verify file integrity: Use digital signature  technology to verify whether the downloaded binary file is consistent with the official version released. Digital signatures can ensure that the file has not been tampered with during transmission."}]}],"pr":"bbc72daf7d18d41afa7fbc75d1e31f4516492be573c1abb56ccaea225b1ade3b"}