{"p":"can-20","op":"mint","tick":"can","amt":"1000","rows":[{"df":"qa","content":[{"q":"How does blockchain ensure the security and privacy of transactions?","a":"Decentralization: Blockchain adopts a decentralized network architecture, storing  data on multiple nodes, avoiding single centralized control, and thereby reducing the risk of tampering and attack."}]}],"pr":"92091a295c8ff95a43212c3df0988cd2b5a4ff49850ee1db0516a769a3280120"}