A digital signature is a mathematical technique that is used to verify the authenticity and integrity of a message, software, or digital document with the help of cryptography techniques. It is the digital equivalent of a handwritten signature or seal and offers greater internal security. Digital signatures are intended to address the problem of forgery and forgery in digital communications.

Digital signature:-

A digital signature can prove the origin, identity, and status of an electronic document, transaction, or digital message(ultimately this works as a simple signature but in a digital way). The signatory may also use them to verify their informed consent.

In many countries, including the United States, digital signatures are as legally binding as traditional handwritten signatures on documents.

How do digital signatures work?

Digital signatures are completely based on public key cryptography (an information-hiding technique), this cryptography is also known as asymmetric cryptography. Two keys are generated using a public key algorithm such as RSA (Rivest-Shamir-Adleman), one is a private key and the other is a mathematically concatenated pair of public keys.

Digital signatures work through two mutually verified cryptographic keys in public key cryptography. The person creating the digital signature uses a private key to encrypt the data associated with the signature, but the only way to decrypt that data is with the signer's public key.

If the recipient cannot open the document using the signer's public key, there is a problem with the document or the signature. This is the method how digital signatures are verified through asymmetric cryptography

Digital signature technology requires all parties to trust that the person who created the signature has kept the private key secret. If another party has access to the private signing key, that party can create fraudulent digital signatures on behalf of the owner of the private key.