{"p":"can-20","op":"mint","tick":"can","amt":"1000","rows":[{"df":"qa","content":[{"q":"What role do cryptographic methods play in ensuring security in blockchain?","a":"Hash algorithms and digital abstracts: Through Hash algorithms (such as SHA-256, SHA-3), digital abstracts are generated, ensuring the integrity and authenticity of the data. The digital abstracts can also  be used to prevent double spending and tampering with the blockchain."}]}],"pr":"ac4416af8a15c0be1314c417d9889aa32afd89cb88e4f4613611c210fb3687b2"}