{"p":"can-20","op":"mint","tick":"can","amt":"1000","rows":[{"df":"qa","content":[{"q":"How is the security of blockchain ensured?","a":"Distributed storage: The data and ledgers in the blockchain  network are distributed across various nodes, without a centralized storage server. This makes the data difficult to attack or tamper with. Any downtime or attacks on nodes will not result in data loss or tampering."}]}],"pr":"5b20ff4369757bcd3ae25ec35983eb5e9314d715cd21aabe5453fa52590f5733"}