{"p":"can-20","op":"mint","tick":"can","amt":"1000","rows":[{"df":"qa","content":[{"q":"What are the backend options available for password management in blockchain?","a":"Biometric identification technologies: Such  as fingerprint recognition, facial recognition, etc., used for user identity verification."}]}],"pr":"f04c57518dfd113903da7d1717dfe564fdb68a337d6238c5ccd615e62dd2d68b"}