{"p":"can-20","op":"mint","tick":"can","amt":"1000","rows":[{"df":"qa","content":[{"q":"How do durable nonces in blockchain contribute to password upgrade operations?","a":"Generate one-time passwords: Users generate a unique and one-time password when they need to log into a specific  service or system."}]}],"pr":"408a1682efe3646e4de8e6b8cd6df245055744da2bda8c6eae19c6878fa5b229"}