{"p":"can-20","op":"mint","tick":"can","amt":"1000","rows":[{"df":"qa","content":[{"q":"How does blockchain ensure the privacy and security of data?","a":"Cryptographic protection: The data encryption technology in blockchain can ensure data privacy. Each data block contains the hash value  of the previous block, forming a chain structure. The encryption algorithm makes it difficult for attackers to tamper with the data without being detected."}]}],"pr":"475b1934fa4b9980cc77dba93c0a2942345d7a634294e98ed575238068a0676a"}