{"p":"can-20","op":"mint","tick":"can","amt":"1000","rows":[{"df":"qa","content":[{"q":"What are the different block signing schemes in blockchain?","a":"Digital Signature Algorithm  (DSA): This is a asymmetric encryption algorithm used to implement digital signatures for messages. In blockchain, nodes use private keys to sign the block header information, and then use public keys to verify the signature. This scheme ensures the uniqueness and immutability of block signatures."}]}],"pr":"ff5e81339ae624dfea943771dee412f8b4a5a45a2da7cf6791a6b714c6f86b3a"}