Author(s): Nikita Chhillar, Nisha Yadav, Neha Jaiswal

A DIGITAL SIGNATURE is a mathematical scheme for demonstrating the authenticity of a digital message or document. It provides authentication, non repudiation and integrity to the message. Digital signatures are commonly used for software distribution, financial transactions, and in other cases where it is important to detect forgery or tampering and they are also known as the “CRYPTOGRAPHIC SIGNATURES OR ELECTRONIC SIGNATURES”. With the development of Internet, digital signature becomes more and more important for the electronic commerce security because of its data integrity protecting and privacy. Anyone can verify this signature using the corresponding publicly revealed encryption key. Considered by the electronic signature industry as the most reliable way to sign of the three types of electronic signatures and the only standard signing solution available, digital signatures are a thoroughly-tested and well established technology.