Procure 2-yr validity DSC for the Form 16 signing authority. 

While DSC has limited utility for individuals, it is required by authorized corporate personnel to enable digital signing of Form 16. 

DSC with 2-yr validity is provided by taxspanner to Form 16 signing authority of the companies. Email contact@taxspanner.com to procure DSC. 

What are digital certificates? 
Digital certificates are the digital equivalent (i.e. electronic format) of physical or paper certificates. Examples of physical certificates are driver's licenses, passports or membership cards. Certificates serve as identity of an individual for a certain purpose, e.g. a driver's license identifies someone who can legally drive in a particular country. Likewise, a digital certificate can be presented electronically to prove your identity or your right to access information or services on the Internet.

A digital signature is an electronic signature that can be used to authenticate the identity of the sender of a message or the signer of a document, and possibly to ensure that the original content of the message or document that has been sent is unchanged. Digital signatures take the concept of traditional paper-based signing and turn it into an electronic "fingerprint.”  This "fingerprint,” or coded message, is unique to both the document and the signer and binds both of them together.

“Digital Signature" means authentication of any electronic record by a subscriber by means of an electronic method or procedure in accordance with the provisions of Information Technology Act 2000.

Typically certificates are used to generate confidence in the legitimacy of a public key. In addition to verifying a signature, verifying the signer's certificate increase the confidence of the receiver in ensuring that attempted forgery or impersonation has not occurred.

Digital certificates can be used as to verify someone's (or some company's) identity. It can be used in a variety of ways including to control access on web sites, to create virtual private networks, to secure e-mail, and to guarantee the authenticity of downloaded software.