Class 3 Individual Signing With Encryption Digital Signature




Class 3 Digital Signature Certificate (DSC) provides the highest level of assurance or trust within the RCAI hierarchy setup of Controller of Certifying Authorities (CCA) in India. which is mainly used for e procurement and e tendering. Digital Signature Certificate Class 3 are issued to Individuals or Organizations. They are especially used to authenticate the identity of the vendors as well as buyers in any e-Procurement, e-Tendering and e-Bidding process. This Digital certificate will be issued to individuals as well as organizations. As these are high assurance certificates, primarily intended for e-commerce applications, they shall be issued to individuals only on their personal (physical) appearance before the Certifying Authorities.Class 3 Digital Signature Certificate come in three validity, One Year, Two Years and Three Years. A Digital Signature Certificate Class 3, on the other hand, is of a higher level as it is issued only after the registrant’s identity verification has been done by a Registration Authority. There are many types of DSC that cater to specific needs. While e-Filing on the Ministry of Corporate Affairs portal, a DSC of Class 2 and Class 3 category is required.


Class 3 digital signature can be issued in two categories : Signing , Signing & Encryption. Signing Certificate could only be used for signing a document whereas encryption certificate provides protection to encrypted document / information over the transmission of document / information on internet. Encryption Certificates are most popular to use on eTendering or eProcurment platforms. Encryption certificates basically secure the documents / information until it reaches to intended recipient.

Class 3 DSC : It can be issued in the name of individuals as well as organisations. These are legally valid and are used for e-commerce applications. Applicants have to appear before the certifying authority of the registration authority for obtaining class 3 Digital Signature Certificate. Users can buy class 3 digital signature certificate issued by Capricorn CA at 


A digital Signatur certificate (DSC) provides an electronic means of proving your identity. It also provides a high level of security for online transactions. You can use certificates to encrypt information so that only the recipient can read it. You can digitally sign information to provide assurance that the recipient has not been modified in transit, and allow verification that actually sent the message.


Digital Signature Certificate, in simple terms, is a file created by a Licensed Certifying Authority through encryption and is then issued to you, in the USB eToken. When signing any particular document this file is accessed, which acts like a ‘key’ (Private Key) and locks & secures the document being signed (through encryption). [This is similar to using a key in a physical lock to secure your valuables in a bank locker – a lock can only be opened by its own key].

In addition to locking the document being signed, this file also adds a Digital Certificate to it containing your identity details, viz. name, Organization’s name, email ID, etc.

It also adds a key code (known as public key) which is the same key that resides in the certifying authority server, thereby allowing the other party to validate the authenticity of your DSC. Contrary to popular myth, the DSC does NOT contain a scanned copy of your physical signature.


According to the Ministry of Corporate Affairs, every individual that is required to sign manual documents and returns filed with ROC is required to obtain a Digital Signature Certificate (DSC). These include:

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

The Certifying Authorities are authorized to issue a Digital Signature Certificate with a validity of at least one year. A DSC is unique to each individual. If a professional has obtained a DSC, he/ she can use the same for e-filing of forms for multiple companies, provided he/ she has been authorized to do so by the respective companies. Digital Signatures are legally admissible as per IT ACT 2000 and are password protected and cannot be copied from a digitally signed document.


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 Digital Signatures certificate (DSC) is a digital certificate establishes the identity of the holder. A digital signature is a type of asymmetric cryptography used to simulate the security properties of a handwritten signature on paper. It is like a PAN card or a passport and enables the holder to prove his identity.  Usage: A Class 3 DSC is issued by a Certifying Authority (CA) after thorough verification of the user’s identity and provides higher level of assurance to the relying party (generally the receiver of such digitally signed document). Class 3 DSC IS used for filing electronic documents and electronic submissions of tenders and auctions, e-bidding, e-auctioning, Patents Filing , logos Filing and for Registrar of corporations E-filing, VAT return e-filing, TDS return  E-filing,  Income tax E-filing, sign a word or PDF and more. There are different types of SCs DSCs. Class 3 DSCs are with the highest level of cryptographic security requirements and can be issued in the name of individuals as well as companies / organisations. Assurance Level: This certificate can be issued to individuals as well as organizations. As these are high assurance certificates, primarily intended for e-commerce applications, they shall be issued to individuals only on their personal (physical) appearance before the Certifying Authorities.

Type of Certificates Sign – Sign DSC can only be used for signing documents. The most popular usage of is signing the PDF file for Tax Returns, MCA and other websites. Signing via DSC gives the assurance of not only the integrity of the signer but also the data. It is proof of untampered and unaltered data. Encrypt – Encrypt DSC can only be used to encrypt a document it is popularly used in the tender portal, to help companies encrypt the documents and upload. You could also use the certificate to encrypt and send classified information. Encrypt DSC is fit for e-commerce documents, legal documentation and sharing documents that are highly confidential and contains information that needs to be protected. Sign & Encrypt – Sign & Encrypt DSC can be used for both signing and encrypting. It is convenient for users who need to authenticate and maintain the confidentiality of the information shared. Its usage includes filing government form and application. Validity of the Certificate: The certificates can be bought with a validity upto three years. The validity is controlled by law, and one cannot buy certificates more than three years and less than One year validity.  Process for issuing DSC: The certificates can be issued to both an individual and an organization (Indian and Foreign).  Class 3 DSC can be given to Foreign National after accommodation of required documents and by following appropriate validation. Digital Signature for Foreign Organization can be given to any representative who is residing in India and working for the concerned association. Citizens of different nations or their organizations, as well as Indian nationals abroad, can apply for a digital signature to securely transact in the nation. Documents required for DSC For Indian 1. Application Form – Duly Filled, Signed and applicant photo with across signature of applicant.

2. Authorization Letter from Organization. 3. Proof of identification – The following documents are accepted as a proof of identification: Passport PAN Card of the applicant Driving License Photo ID card issued by the Ministry of Home Affairs of Centre/State Governments Any Government-issued photo ID card bearing the signature of the applicant 4. Proof of Address – The following documents can be submitted as a proof of address:
AADHAAR Card Voter ID Card Driving License (DL)/Registration Certificate (RC) Water Bill (Not older than 3 Months). Electricity Bill (Not older than 3 Months) 5. Attestation of all Supporting Documents, Application Form.  For Foreign National

1. Application Form – Duly Filled, Signed and applicant photo with across signature of applicant. 2. Authorization Letter from Organization. 3. Proof of Identity (All given below) Copy of passport. Copy of VISA (If applicants are not living in their native country) Copy of Resident Permit Certificate (if applicant is presently in India) Note: Attested copy of PAN is mandatory if applicant has a PAN. 4. Proof of Address (Choose from options below) Copy of passport (with address included). Copy of any other Government/Bank issued documents. 5. Attestation of all Supporting Documents, Application Form. Procedure for obtaining DSCs

A person can obtain DSC by applying to any Indian Certifying Authority (CA) authorized vendors to the certifying authority on a payment of some prescribed fees. The vendors further provide general or customer-oriented information regarding obtaining a DSC. Licensed CA issues the digital signature. CA means the authority that has been granted a license to issue a digital signature certificate under Section 24 of the Indian IT-Act 2000. The vendors like e-Mudhra ( , TCS ( , Sify, MTNL, nCode ( provides  DSC’s for bidders. The time taken by Certifying Authorities to issue a DSC may vary from three to seven days. ***** Disclaimer: The contents of this article are for information purposes only and do not constitute an advice or a legal opinion and are personal views of the author. It is based upon relevant law and/or facts available at that point of time and prepared with due accuracy & reliability. Readers are requested to check and refer relevant provisions of statute, latest judicial pronouncements, circulars, clarifications etc before acting on the basis of the above write up.  The possibility of other views on the subject matter cannot be ruled out. By the use of the said information, you agree that Author / TaxGuru is not responsible or liable in any manner for the authenticity, accuracy, completeness, errors or any kind of omissions in this piece of information for any action taken thereof. This is not any kind of advertisement or solicitation of work by a professional.



Every vendor is required to use a Class 3 Digital Signatures Certificate. By Using This Certificate You can Participate/Bid in Any Kind of Online eTendering, eProcurement, eBidding, eAuction across India.
  • Government Of Madhya Pradesh
  • Government Of Chhattisgarh
  • Government Of Assam
  • Government Of Maharashtra
  • Department Of Atomic Energy
  • New Delhi Municipal Council
  • Balmer Lawrie
  • Mangalore Refinery and Petrochemicals Limited
  • Government of Andhra Pradesh & its departments
  • Northern Railway eProcurement
  • DGS&D e-Tendering
  • ONGC – Oil & Natural Gas Corporation Ltd
  • Air-India
  • Coal India Ltd
  • ISRO – Indian Space Research Organization
  • Indian Oil Corporation
  • Hindustan Aeronautics Ltd.
  • Kerala Sustainable Urban Development Project KSUDP
  • South Central Railway
  • BEST (Mumbai)
  • Indian Ordnance Factories.
  • Hindustan Petroleum
  • NTPC-National Thermal Power Corporation Ltd
  • National Highways Authority of India
  • Power Grid Corporation of India
  • Oil India Limited
  • Bharat Petroleum Corporation Limited (BPCL)
  • Gas Authority of India Limited
  • Bharat Heavy Electricals Ltd., (via Mjunction)
  • Association of State Road Transport Undertakings ASRTU
  • Bharat Sanchar Nigam Limited BSNL
  • Centre for Development of Imaging Technology CDIT Kerala
  • Union Territory of Lakshadweep UTL
  • Uttarakhand Power Corporation Limited UPCL
  • Tehri Hydro Development Corporation Limited THDC
  • Jawaharlal Nehru Port Trust JNPT
  • Electronics Corporation of TamilNadu
  • Director General Naval Projects Visakhapatnam
  • Central Public Works Department CPWD
  • Cochin Port Trust CPT
  • Indian Institute of Management Bangalore IIMB
  • Delhi Development Authority DDA
  • Container Corporation of India Limited CONCOR
  • Satluj Jal Vidyut Nigam Limited
  • Kerala State Civil Supplies Corporation Ltd KSCSC
  • Kerala State Poultry Development Corporation Limited KEPCO
  • Power Transmission Corp of Uttarakhand Ltd PTCUL
  • Public Works Department Government of Puducherry
  • Himachal Road Transport Corporation HRTC
  • Hindustan Newsprint Limited HNL
  • National Institute of Ocean Technology NIOT
  • Kerala Water Authority KWA
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