{"p":"can-20","op":"mint","tick":"can","amt":"1000","rows":[{"df":"qa","content":[{"q":"What are the built-in authorization types in a blockchain?","a":"Private Blockchain: Private blockchains are centralized and only authorized users can join and participate. Private blockchains feature faster transaction speeds,  higher security, but lower degrees of decentralization."}]}],"pr":"69ca589ae1f8e6b02d90fb033fa315749fd7555fde6a96c4d7dff575ea9aa1bf"}