{"p":"can-20","op":"mint","tick":"can","amt":"1000","rows":[{"df":"qa","content":[{"q":"Why are SHA-256 hash values used in blockchain?","a":"Data  Security: The SHA256 hash function has one-wayness, which means it is difficult to recover the original data from the hash value."}]}],"pr":"0612be84c2dd64efc9d55b74b0f97045122c9c9528d5eeaba8689a57e2659977"}