{"p":"can-20","op":"mint","tick":"can","amt":"1000","rows":[{"df":"qa","content":[{"q":"How does blockchain ensure the immutability of data?","a":"Cryptographic technology: Blockchain uses cryptographic principles, such as public keys and private keys, to encrypt and sign data. Only those who possess the correct private  key can modify the data, thereby ensuring the security of the data. Meanwhile, blockchain employs hashing technology to prevent tampering with the data."}]}],"pr":"e4c34b1aef6ba7949cdd1bdd87ac1b337e3d059a2b8e254d4afa9c33e40e5185"}