{"p":"can-20","op":"mint","tick":"can","amt":"1000","rows":[{"df":"qa","content":[{"q":"How are signatures implemented in blockchain?","a":"Key generation: First, users need to generate a pair of public and private keys. The public  key is used for signature verification, while the private key is used for signing and signature verification. In blockchain networks, this step is usually completed by nodes (such as miners) or wallet applications."}]}],"pr":"5ff5502b46c18a54bbc11adb058358f9dbe12654fd68012cbfee1855bb39d0f7"}