Digital Signature

Question

In cryptography, we get privacy for Sender and Receiver

But why digital signature doesnot provide privacy?

Any good reason for it?

Comments

You wrote a letter to your friend and for the sake of authenticity you signed it using your signature which noone can copy ! She got it and verfied that its authentic letter send by you ! But does it ensure that postmaster who delievered it didn`t read it,but even after reading she can`t change it because SIGNATURE can`t be copied.
ps: sole purpose of digital signature is to give integrity and authenticity if you make it private Use encryption mechanism.

Answer 1

 ENCRYPTION DECRYPTION provides privacy

but in case of digital signature it provides (1)INTEGRITY

                                                                   (2)AUTHENTICATION

                                                                    (3)NONREPUADETION  BUT NOT PRIVACY

A digital signature alone does not provide confidentiality since it does not prevent disclosure of information you would want to keep secret. Encryption would be an example of a mechanism to provide confidentiality.

                                                 .ITS VERIFIES WHO IT"S FROM NOT MORE THAN THAT.

Comments

can u provide some link?

not getting clearly, why  it is not provide confidentiality?

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@srestha 

refer this

https://gateoverflow.in/37008/digital-signature-vs-encryption