A Digital Signature Certificate, like hand written signature, establishes the identity
of the sender filing the documents through internet which sender can not revoke
or deny. Accordingly, Digital Signature Certificate is a digital equivalent of a
hand written signature which has an extra data attached electronically to any message
or a document. Digital Signature also ensures that no alterations are made to the
data once the document has been digitally signed. A DSC is normally valid for 1
or 2 years, after which it can be renewed.
A Digital Signature is a method of verifying the authenticity of an electronic document.
Digital signatures are going to play an important role in our lives with the gradual
electronisation of records and documents. The IT Act has given legal recognition
to digital signature meaning, thereby, that legally it has the same value as handwritten
or signed signatures affixed to a document for its verification.
The Information Technology Act, 2000 provides the required legal sanctity to the
digital signatures based on asymmetric cryptosystems. The digital signatures are
now accepted at par with handwritten signatures and the electronic documents that
have been digitally signed are treated at par with paper documents.