Digital Signature is referred as physical signature in an electronic format. Generally, Digital signature is used in India for online transaction such as company registration, filing annual return, Income tax e-filing etc. It contains your (name, email, country, APNIC account name and public key). Digital Signature Certificate is done through Registration Desk with legal professionals. A Digital Signature Certificate (DSC) is a secure digital key which is issued by a Certifying Authority (CA).