{"p":"can-20","op":"mint","tick":"can","amt":"1000","rows":[{"df":"qa","content":[{"q":"How does blockchain technology achieve user authentication?","a":"Decentralized Storage: Blockchain  technology adopts a decentralized storage method, where user information is distributed and stored on multiple nodes. This avoids the risk of centralized storage being easily attacked by hackers, thereby improving the security of the data."}]}],"pr":"31341f350e4a629121eba6f91137ee46bd9da007f5a8adc955af936a24680c20"}