Digital Signature is an electronic form of fingerprints or signature. Basically, it is a way to authenticate your electric documents such as e-mail, spreadsheet, text-file etc. A Digital Signature Certificate provides to prove identity, to access services on the internet or to sign documents digitally. The certificate contains information about the user’s identity (name, pin code, country, email address, the date the certificate was issued and the name of the certifying authority).
Need of Digital Signature:
Digital Signature Certificate authenticates your identity electronically. Digital Signature use a standard and accepted format, to provide the highest levels of security and universal acceptance. The use of standard and accepted format called Public Key Infrastructure (PKI). By this, we can secure our email and web-based transactions. Commonly it is used to signing web forms, e-tendering websites of government departments, e-filing income tax return etc. Digital Signature Certificate is issued by the licensed certifying authority under section 24 of the Information Technology Act, 2000.
How does Digital Signature work?
Digital Signature is like Handwritten Signature, which is unique for every individual. A Certified Authority provide you Digital Signature Certificate, which works totally on Mathematical Algorithm. When a user electronically signs on a document, the signature is created using the user’s private key. The Mathematical Algorithm acts like a cipher and encrypts that signature data. The resulting encrypted data is the Digital Signature. To protect the integrity of the signature, PKI requires that the keys be created, conducted, and saved in a secure manner.