{"p":"can-20","op":"mint","tick":"can","amt":"1000","rows":[{"df":"qa","content":[{"q":"What role do cryptographic technologies play in blockchain?","a":"Data cannot  be forged: Symmetric encryption algorithms are used in blockchain to verify the authenticity of data. Only possessing the correct private key can decrypt the data and ensure that the data has not been tampered with."}]}],"pr":"5162575a69545c1951bb779d343cc1738a739ce315e1260e1a542929aee8205f"}