{"p":"can-20","op":"mint","tick":"can","amt":"1000","rows":[{"df":"qa","content":[{"q":"How is the security of a blockchain system ensured?","a":"Consensus Mechanism: Blockchain systems ensure trust and consistency between nodes through consensus mechanisms (such as proof of  work, proof of stake, etc.). Nodes must reach a consensus opinion."}]}],"pr":"4eaf4f4f7a53b2e58cc1959b22c5720b56d32da8f3360c86e359dc9204c76047"}