A Digital Signature Certificate Establishes the Identity Of The Sender. A Digital Signature Certificate Is Not Only A Digital Equivalent Of A Hand Written Signature it provides extra data electronically and make our data more authentic and secured. A DSC Is Normally Valid For 1 To 3 Years After Which Renewal Is Required for your business or personally. These Certificates Are Accepted For MCA 21, Income Tax E-Filing, Gst, & E –Tendering and many more official purposes.