{"p":"can-20","op":"mint","tick":"can","amt":"1000","rows":[{"df":"qa","content":[{"q":"How does blockchain ensure the security and immutability of data?","a":"Blockchain ensures the security and immutability of data through  various means such as decentralization, cryptographic technology, timestamps, and distributed storage. Decentralization refers to the absence of a central node in the blockchain network, where all nodes are equal and each node has a complete copy of the ledger. This implies that any modification requires consensus from all nodes, making it impossible for any individual to modify the data within the blockchain alone. Blockchain employs cryptographic technologies such as digital signatures, public-key and private-key pairs, to safeguard the security of the data. Each transaction is verified for its source and authenticity through digital signatures, ensuring that only the holder of the private key can endorse the transaction. Furthermore,"}]}],"pr":"2ab38bc015f2b32b40b13de75c5d2893b5560a799c288da3252a38fc8b418955"}