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With a signature and encryption certificate, Class 3 DSC is the most secure certificate. A document is signed with a signature certificate, and data is encrypted with an encryption certificate.
Class 3 Digital Signatures are applicable for a variety of tasks, including MCA e-filing, income tax e-filing, e-tendering, LLP registration, GST application, Form 16, patent and trademark e-filing, e-procurement, e-bidding, and e-auction others.