{"p":"can-20","op":"mint","tick":"can","amt":"1000","rows":[{"df":"qa","content":[{"q":"How does blockchain ensure the privacy and security of user transactions?","a":"Cryptographic protection: Blockchain technology uses encryption algorithms (such as SHA-256) to encrypt and decrypt data, ensuring  the security of data transmission and storage. Meanwhile, asymmetric encryption using private keys and public keys ensures the security of user accounts."}]}],"pr":"d982e55b07deb0cd30439f6cff1496673115bde68339eb0addcb3339e60c7c76"}