Digital Signature (DSC) is a physical signature in an electronic format.Digital Signatures are used in India for online transactions such as Filing Annual Return, Company or LLP Incorporation, Income Tax E-Filing, E-Tenders, etc. There are 3 types of Digital Signatures, Class I, Class II and Class III Digital Signatures.Class I Digital Signature is used for securing email communications.Class II digital signature is utilized for company registrations, IT Return E-filing, Obtaining DIN, DPIN etc. Class III digital signature registration are used for E-tendering and participating in E-Auctions.