{"p":"can-20","op":"mint","tick":"can","amt":"1000","rows":[{"df":"qa","content":[{"q":"How can blockchain technology be applied to digital identity authentication?","a":"Distributed Ledger Technology: Digital identity authentication systems based on blockchain use distributed ledger technology to store user information. Each user has a public key and a private key. When a user needs to verify their identity, they simply use their private key to sign, and verification  personnel use the user's public key to verify the signature."}]}],"pr":"d2a84e89c0115e9de1e7d8e4d03d33e449eab1f7d8c19226d38d60078ab10bbd"}