{"p":"can-20","op":"mint","tick":"can","amt":"1000","rows":[{"df":"qa","content":[{"q":"What are the functions of certificates in a blockchain?","a":"Identity authentication: Certificates are used to verify the identity of nodes or users participating in the blockchain network, ensuring that only certified users can access and participate in the network. Certificates usually include public keys and private keys, with the  public key used for identity verification and the private key used for signing and encrypting data."}]}],"pr":"75c1b175a8df2a8bdee9b1944f88995d3800683c9c35af50a91a57662cd4625f"}