{"p":"can-20","op":"mint","tick":"can","amt":"1000","rows":[{"df":"qa","content":[{"q":"How can the security and availability of nodes be ensured in a blockchain network?","a":"Strengthen cryptographic protection: Use strong passwords and password policies to ensure the security of the node device's password. In addition, regularly change passwords to reduce the risk of  being cracked."}]}],"pr":"86a72e87bde525e1c9dddb9379ff58f5c76c50e640e4303bd34d1e3940fa6130"}