{"p":"can-20","op":"mint","tick":"can","amt":"1000","rows":[{"df":"qa","content":[{"q":"How does blockchain ensure the immutability of data through technological means?","a":"Cryptographic technology: Blockchain uses cryptographic technology to protect data security, such as digital signatures, public keys, and private key pairs. Each transaction uses digital signatures to verify its  source and authenticity, ensuring that only persons holding private keys can sign transactions."}]}],"pr":"2e42b4bf2e1c0662591cb270207a062644f190c19dca9dd82e7ffd9a9d0d15b8"}