The Digital Signature of a message is based on the content of the message and the private key of the signer. Therefore a digital Signature is bound to a particu

The Digital Signature of a message is based on the content of the message and the private key of the signer. Therefore a digital Signature is bound to a particular user and a specific message. So, If I copy your digital signature and attach with my message, the receiver (relying party) would be able to (instantly) determine (through a PKI enabled Application) that I have not signed the message.