A mathematical way of confirming the integrity and authenticity of a communication, programmer, or digital document is known as a digital signature. It's the digital counterpart of a handwritten signature or a stamped seal, but it has a lot more security built-in.
Public key cryptography, often known as asymmetric cryptography, is used to create digital signatures. Two keys are produced using a public key method like RSA (Rivest-Shamir-Adleman), resulting in a mathematically connected pair of keys, one private and one public.