{"p":"can-20","op":"mint","tick":"can","amt":"1000","rows":[{"df":"qa","content":[{"q":"What security issues are involved in blockchain?","a":"Data Security:  Due to the irreversible nature of blockchain data, it is difficult to recover if data is lost or damaged. Therefore, ensuring secure storage and transmission of data while maintaining data integrity is an important issue."}]}],"pr":"f0ebacfa12e0bcff83dc63c718d231090321c5d79da7452b7b3c7ffc2853d14c"}