A digital signature is called a digitally scanned signature. Digital signature:A digital signature€”a type of electronic signature€”is a mathematical algorithm routinely used to validate the authenticity and integrity of a message (e. g. , an email, a credit card transaction, or a digital document). Digital signatures create a virtual fingerprint that is unique to a person or entity and are used to identify users and protect the information in digital messages or documents. In emails, the email content itself becomes part of the digital signature. Digital signatures are significantly more secure than other forms of electronic signatures. Digital signatures increase the transparency of online interactions and develop trust between customers, business partners, and vendors. Hence, a digital signature is a mathematical technique used to validate the authenticity and reliability of a message, software, or digital document.