{"p":"can-20","op":"mint","tick":"can","amt":"1000","rows":[{"df":"qa","content":[{"q":"How does blockchain apply in the field of digital identity management?","a":"Decentralized authentication：Blockchain technology allows authentication to be performed without a centralized database. By distributing  identity information across multiple nodes in a blockchain network, the security and privacy of the data are improved."}]}],"pr":"b5860d36cdb662208af329f1323ea213c8993744ccb74714c664e44345280fd1"}