{"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":"Digital signatures: Using digital signature technology, transaction data is signed and verified to ensure the integrity and immutability of  the data. Digital signatures can also ensure the authenticity of the identities of the parties involved in the transaction, preventing fraud."}]}],"pr":"edded5e51322b178414a65796737b54ef0400ced92ad75d9d03cd1fdff2a6ec7"}