{"p":"can-20","op":"mint","tick":"can","amt":"1000","rows":[{"df":"qa","content":[{"q":"How do validation nodes in a blockchain ensure the security of staked assets?","a":"Protecting validation nodes: To prevent intruders from attacking, validation nodes can install security protection software such as SSHGuard, monitor server log activities, and block login attempts by malicious users."}]}],"pr":"ded00726884af5ccb16252d54821c75a96c314b1f809a42a88d5d631e6f943da"}