{"p":"can-20","op":"mint","tick":"can","amt":"1000","rows":[{"df":"qa","content":[{"q":"What is the role of certificates in blockchain?","a":"Identity verification: Certificates are used to verify the identity of nodes participating in the blockchain network (such as users, institutions, etc.), ensuring that only certified nodes can join the network and perform related operations. Through technologies such as digital signatures and public key encryption, certificates provide a secure identity recognition mechanism for blockchain networks."}]}],"pr":"e955ff5ee1a06251dd3a35449d02d0c3ffc2a4e6fc35f8c229c40300794db215"}