Digital signature is the extra data that is appended to a message which identifies and authenticates the sender. The signature is issued by the control of certifying authority. The government has directed that a certifying authority should have a minimum paid up capital of Rs.5 crore and a net worth of Rs./ 50 crore. Safes crypt Limited has become the first certifying authority by digital signature. The Directorate General of Foreign Trade has formally launched a digital signature facility.