A major benefit of public key cryptography is that it provides a method for employing digital signatures. The digital signatures provide:
A digital signature serves the same purpose as a handwritten signature.
However, a handwritten signature is easy to counterfeit. A digital signature is
superior to a handwritten signature in that it is nearly impossible to
counterfeit, plus it attests to the contents of the information as well as to
the identity of the signer.
|How do the digital signatures work?|
A digital signature is a unique string of bits that is separately generated for each message, 'signed' by the private key of the sender, and appended to the message prior to being forwarded to the intended recipient. By verifying the signature through using the public key of the sender, the receiver will be able to confirm the identity of the sender and be certain that the message has not beenaltered during transmission.