{"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":"69bb135d2381a43374f249fea684216f1bf3eb1faad37af716d53aee36aa7edf"}