Digital signature is a type of electronic signature that offers added verification of the individual’s identity signing documents. It does this by providing a digital ID and an encoded stamp authentication stamp to confirm the information created by them. A digital signature deals with the problem of tampering and impersonation in digital communications. Digital signatures are built on public key cryptography, also known as asymmetric cryptography. Public key cryptography's two mutually authenticating cryptographic keys are used in digital signatures. The person who creates the digital signature encrypts the data associated with it using a private key, and only the signer's public key can be used to decrypt it.