Digital Signature

Documents Required For Digital Signature Of Class III With Organization Name
For Contractors/Suppliers/Vendors

  • Duly Filled class III with org application Form, Letter Of Employment (If Req) & Letter Of Authority (If Req)
  • Self-Attested Photo
  • Id proof - pan card/passport/drivers licence-attested notary/gazette officer/banker
  • Address proof - attested notary/gazette officer/banker
  • Business Proof –

For Private Limited Company/ Limited Companies

Certificate Of Incorporation - Attested By Company Secretary Or Director

For Partnership Companies – Partnership Deed or Reg. Certificate of


For Proprietary Firms - Shop Act/VAT/Excise/Registration Certificate of

Any Government body.

What is DSC ?

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.


Under MCA21 Every person who is required to sign manual documents and returns filed with ROC is required to obtain a Digital Signature Certificate (DSC). Accordingly following have to obtain Digital Signature Certificate:

  • Directors
  • Auditors
  • Company Secretary - Whether in practice or in job.
  • Bank Officials - for Registration and Satisfaction of Charges
  • Other Authorized Signatories.

There are 3 types of Digital Signature Certificates, having different security levels, namely :- Class-1, Class-2 , Class-3. For filing documents under MCA21, Income Tax, Vat etc. a Class 2 Digital Signature Certificate issued by a Licensed Registration Authority is required. We also offer Class 3 besides Class 2 certificates which are required in e-tendering, e-procurement .

Why USB e-token? A Digital Signature certificate (DSC) is kept in internet explorer of computer system (PC) but keeping DSC on your computer system has following draw backs :-
  • a) It can be misused by anyone who is having access to your computer system.
  • b) DSC is lost if computer system is formatted or internet explorer is changed.

Accordingly, safe and proper method is to keep DSC on e-token, a small USB port devise, which is password protected. The said e-token is a small hardware device and can be plugged to USB port of any system to digitally sign the documents and when not in use can be kept in safe custody.

Why Digital Signatures?

Ministry of Company Affairs, Government of India (GoI) has initiated MCA21 program, for easy and secure access to its services in a manner that best suits the businesses and citizens. MCA21 is envisioned to provide anytime and anywhere services to businesses. It is a pioneering program being the first mission mode e-governance project being undertaken in the country. This program builds on the GoI vision to introduce a Service Oriented Approach in the design and delivery of Government services, establish a healthy business ecosystem and make the country globally competitive.

The MCA21 application is designed to support Class 2 & 3 Digital Signature Certificates (DSC) issued by licensed Certifying Authority under Controller of Certifying Authorities.

Those individuals recommended and forwarded by Superior Authority or those who approach any RA office operating under CA with proper certification from Chartered Accountant/Cost Accountant can avail our certification services for obtaining digital certificate.

Are any conditions imposed for issue of the DSC?

For issuing the DSC, the certifying authority should take into consideration the following points:

  • *The applicant holds the private key corresponding to the public key to be listed in the DSC.
  • *The applicant holds the private key, which is capable of creating a digital signature.
  • *The public key to be listed in the certificate can be used to verify a digital signature affixed by private key held by the applicant.
What type of Digital Signature Certificate (DSC) is to be obtained for e-filing on the MCA Portal?

DSC of Class 2 and Class 3 category issued by a licensed Certifying Authority (CA) needs to be obtained for e-filing on the MCA Portal.

Is Director Identification Number (DIN) a pre-requisite to apply for DSC?


What is the cost of obtaining a Digital Signature Certificate?

The cost of obtaining a digital signature certificate may vary as there are many entities issuing DSCs and their charges may differ.

What is the validity period of a Digital Signature Certificate?

The Certifying Authorities are authorized to issue a Digital Signature Certificate with a validity of at least one year.

What is the legal status of a Digital Signature?

Digital Signatures are legally admissible as per IT ACT 2000.

How can I carry a Digital Signatures Certificate to the Physical Front Office (PFO)?

You can store your Digital Signature in a Pen Drive/ Removable Media to carry the same to the PFO for digitally signing the e-forms.

Is a company required to obtain a Digital Signature Certificate in its own name for e-filing?

Digital Signature Certificate (DSC) is not required by Companies but by individuals. For example the Director or the Company Secretary, signing on behalf of the Company requires a DSC.

Can I do e-filing of documents if I do not possess a DSC?

No. it is mandatory to have a valid digital signature certificate for e-filing the forms on MCA portal.

Are multiple DSCs required for professionals rendering services to different companies?

No. A DSC is unique to each individual. If a professional has obtained a DSC, he/ she can use the same DSC for e-filing of forms for multiple companies, provided he/ she has been authorized to do so by the respective companies.

Is the Company Secretary in whole-time employment required to obtain a DSC?

Yes. If the Company Secretary is an authorized signatory, he/ she is required to obtain a DSC.

What safety precautions should one take while using a Digital Signature?

You should keep the media carrying your digital signature safely and not disclose your password to anybody.

What if somebody gains possession of my digital signature?

Digital Signatures are password protected and cannot be copied from a digitally signed document.

What is the difference between a Digital Sign on a CD or on a USB token?

There is no difference between the two signatures. Only the media differs.

What is better? A CD or a USB token?

Both have their own advantages and disadvantages. It all depends upon the comfort level of subscriber and his intended usage of the same. Both require passwords for usage. Also see General FAQs contains information on Public Key Infrastructure (PKI), Cryptography, Digital Signature Certificates and Digital Signature technology.

Digital Signature Certificates: An Introduction

Why should I trust a Digital Signature Certificate's contents?

The same reason you trust what is stated in a driver's license: endorsement by the relevant authority (Department of Transport) in the form of a difficult to forge signature or stamp of approval. Digital Signature Certificates are endorsed in a similar manner by a trusted authority empowered by law to issue them, appropriately known as the Certifying Authority or CA. The CA is responsible for vetting all applications for Digital Signature Certificates, and once satisfied, "stamps" its difficult to forge digital signature on all the Digital Signature Certificates it issues, attesting to their validity.

What can I use Digital Signature Certificates for?

Three uses are outlined here. Your Digital Signature Certificate could be used to allow you to access membership-based web sites automatically without entering a user name and password. It can allow others to verify your "signed" e-mail or other electronic documents, assuring your intended reader(s) that you are the genuine author of the documents, and that the content has not been corrupted or tampered with in any way. Finally, Digital Signature Certificates enables others to send private messages to you: anyone else who gets his/her hands on a message meant for you will not be able to read it.

How important is the use of Digital Signature Certificates to me?

Digital Signature Certificates and the CA are just two elements of the Public Key Infrastructure (PKI), an overall Internet security system. Once the PKI is operational, everyone who has a Digital Signature Certificate can be traced and held accountable for their actions. Consequently, uses for the Internet, which could not be fully realized before, will finally take off: electronic banking and commerce (funds transfer, buying and paying on-line), on-line transactions with government agencies (applying for and renewing ICs, licenses, paying fines and bills), and on-line transactions between businesses. The day when the only way to do some of these transactions is through the Internet may not be too far off. Everyone who wants to be part of it will need Digital Signature Certificates.

What do you mean by the Public Key Infrastructure (PKI)?

The PKI is the overall system of identifying parties on the Internet using their certificates. It is headed by a Certifying Authority that is responsible for issuing and verifying the validity of the Digital Signature Certificates.

What is Cryptography?

Cryptography is the science of enabling secure communications between a sender and one or more recipients. This is achieved by the sender scrambling a message (with a computer program and a secret key) and leaving the recipient to unscramble the message (with the same computer program and a key, which may or may not be the same as the sender's key).

There are two types of cryptography: Secret/Symmetric Key Cryptography and Public Key Cryptography

The emphasis of cryptography is on data confidentiality, data integrity, sender authentication, and non-repudiation of origin/data accountability.

What is a key?

Physical keys are used for locking and unlocking. In cryptography, the equivalent functions are encryption and decryption. A key in this case is an algorithmic pattern or rule(s) to render the message unreadable. Below is a simple example of how key is used in a symmetric cryptography. Plain text: transfer rupees five thousand

Key: forward shift all letters by 1 position, i.e. a becomes b, b becomes c, etc
Ciphered text (after encryption): usbtgfs svqfet gjwf uipvtboe
To decipher text: backward shift all letters by 1 position, giving: transfer rupees five thousand
In practice the key has to be much more complicated than this.

What is encryption?

Encryption is the transformation of information from readable form into some unreadable form.

What is decryption?

Decryption is the reverse of encryption; it's the transformation of encrypted data back into some intelligible form

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