Class 3 Digital Signature Certificate (DSC) Services in India
A Class 3 Digital Signature Certificate is a high-assurance digital credential used by individuals and organizations for secure online transactions, statutory filings, and electronic signing. DNB Digital Solutions provides professional guidance and end-to-end assistance for obtaining your Class 3 DSC through a seamless paperless verification process.
What is a Class 3 Digital Signature Certificate?
A Digital Signature Certificate (DSC) is a secure electronic credential that establishes the identity of an individual or organization in the digital realm. Operating on asymmetric Public Key Infrastructure (PKI) technology, a digital certificate binds the holder’s verified personal or organizational identity with a unique cryptographic key pair: a private key used for generating signatures and a public key used for signature verification.
When an electronic document is signed with a Class 3 DSC, the cryptographic algorithm produces a unique digital fingerprint. This mechanism assures the recipient of two vital security principles: authenticity (confirming the exact identity of the signatory) and integrity (ensuring that the document contents have not been altered or tampered with after signing).
Legal and Regulatory Context
In India, digital signatures hold full legal validity and enforceability under the Information Technology Act, 2000 (IT Act 2000). Specifically, Section 5 of the IT Act accords electronic signatures legal parity with traditional physical, handwritten ink signatures across recognized legal, commercial, and governmental workflows.
The regulatory framework for digital signatures is established and overseen by the Controller of Certifying Authorities (CCA), operating under the Ministry of Electronics and Information Technology (MeitY), Government of India. In accordance with CCA guidelines effective from January 1, 2021, older Class 2 certificates were phased out, establishing Class 3 DSC as the standard, sole category for general-purpose electronic signing and encryption across Indian government portals and enterprise workflows.
Role of Certifying Authorities
Digital Signature Certificates are legally issued by licensed Certifying Authorities (CAs) approved by the CCA, such as eMudhra, Capricorn, VSign, Sify, and NSDL. Certifying Authorities verify the identity credentials of the applicant in strict compliance with the Identity Verification Guidelines issued by the Government of India.
DNB Digital Solutions acts as a professional registration and facilitation partner. We assist individuals, directors, professionals, and enterprise applicants with application preparation, document verification, eKYC validation, and cryptographic token setup to ensure smooth, compliant issuance through licensed Certifying Authorities.
Types of Class 3 DSC
Class 3 Digital Signature Certificates are categorized based on applicant ownership and intended technical use:
1. Individual DSC
An Individual DSC is issued solely in the personal name of the applicant. It authenticates the personal identity of the holder and is commonly used by individual taxpayers, company directors signing in their personal capacity with their Director Identification Number (DIN), Chartered Accountants, Company Secretaries, advocates, and authorized executives.
2. Organization / Authorized Signatory DSC
An Organization DSC is issued to an authorized signatory on behalf of a registered legal entity, such as a Private Limited Company, Public Limited Company, Limited Liability Partnership (LLP), Partnership Firm, Trust, Society, or Proprietorship. The certificate contains both the individual signatory’s name and the organization’s legal name, establishing official authority to execute corporate transactions.
3. Signing vs. Signing and Encryption (Combo DSC)
Class 3 Signing Certificate: Used for creating tamper-evident digital signatures on documents and portals. It is suitable for most statutory filings, including MCA, GST, Income Tax, and EPFO returns.
Class 3 Signing & Encryption (Combo Certificate): Combines two distinct key pairs inside the USB token—one certificate for digital signing and one certificate for data encryption. Encryption certificates are required on government e-tendering and e-procurement portals (such as GeM, CPPP, and IREPS) to encrypt bid documents, tenders, and commercial offers prior to formal opening.
Where is Class 3 DSC Commonly Used?
A single Class 3 Digital Signature Certificate can be utilized across a diverse spectrum of government statutory portals and business operations:
MCA and ROC Filings
Mandatory for company directors, partners, and designated signatories on the MCA21 portal for company incorporation (SPICe+), annual compliance (AOC-4, MGT-7), DIR-3 KYC, and charge filings.
Learn about MCA DSC →GST-Related Activities
Used on the GST Common Portal for new GST registration, monthly and quarterly return filing (GSTR-1, GSTR-3B), annual return filing (GSTR-9/9C), and Letter of Undertaking (LUT) submission.
Learn about GST DSC →Income Tax e-Filing
Required for electronic verification of corporate ITR filings, tax audit reports under Section 44AB, Form 15CA/15CB submissions, and response submissions during faceless assessment proceedings.
Learn about Income Tax DSC →Government e-Tendering & e-Procurement
Essential for participating in central and state public e-procurement portals, including CPPP, GeM, IREPS (Railways), and defense tenders using secure signing and encryption combo certificates.
Learn about Tender DSC →Other Portals and Applications
Class 3 DSC is also widely used for Directorate General of Foreign Trade (DGFT) Import-Export Code (IEC) applications, Employee Provident Fund Organisation (EPFO) employer return submissions, ESIC compliance, Intellectual Property / Trademark e-filings (IPIndia), and digital PDF signing for corporate agreements.
USB Cryptographic Token
In compliance with identity and security directives mandated by the Controller of Certifying Authorities (CCA), the private cryptographic key of a Class 3 Digital Signature Certificate must be generated directly inside and stored on a dedicated hardware cryptographic USB token.
The cryptographic architecture of these tokens ensures that the private key is non-exportable and cannot be copied, duplicated, or extracted to an insecure hard drive. To sign documents, the user connects the physical token to their computer and inputs their secure user PIN.
Hardware Compliance & Standards:
- Tokens must adhere to FIPS 140-2 Level 2 (or higher) cryptographic security standards as required under CCA guidelines.
- Common compliant USB token hardware used across India includes ProxKey, ePass2003Auto, WatchKey, mToken, and SafeNet devices.
- No single token manufacturer or brand is mandatory, provided the device satisfies official CCA technical specifications.
- DNB Digital Solutions does not manufacture hardware tokens; we provide pre-configured, CCA-compliant tokens as part of our DSC facilitation services or assist you with certificate download onto your existing compliant hardware.
How to Apply for a Class 3 DSC
Obtaining a Class 3 DSC is a streamlined, paperless process. Our team assists you through each stage:
Select Certificate Requirements
Determine whether you need an Individual DSC or an Organization DSC, and select either a Signing Only or a Signing + Encryption (Combo) certificate based on your target portal requirements.
Complete Identity Verification
Submit your application details for paperless Aadhaar OTP eKYC verification, PAN-based paperless verification, or document-supported online verification.
Complete Video/eKYC Process
Record a brief 20–30 second identity video verification via smartphone or webcam displaying your original documents as required under CCA guidelines.
Certificate Issuance & Token Setup
Upon verification approval by the Certifying Authority, your certificate is generated and securely loaded onto the FIPS-compliant USB crypto token.
Documents Required
Document requirements vary depending on applicant category and the verification mechanism chosen:
For Individual Applicants
- •PAN Card: Self-attested copy of applicant PAN.
- •Address Proof: Aadhaar Card, Passport, Voter ID, or Driving License.
- •Photograph: Recent passport-size photograph.
- •Contact Verification: Active mobile number and email ID for OTP and video verification.
For Organization / Signatory Applicants
- •Organization Proof: Certificate of Incorporation, Partnership Deed, or GST Registration.
- •Organization PAN: Copy of entity PAN card.
- •Authorization Letter / Board Resolution: Authorizing the applicant as designated signatory.
- •Signatory KYC: PAN and ID proof of the authorized signatory.
* Note: Specific documentary requirements may vary based on applicant constitution (Company, LLP, Society, Trust) and the operating guidelines of the issuing Certifying Authority.
Validity and Renewal
Class 3 Digital Signature Certificates are issued with validity periods of 1 year or 2 years. Once a certificate reaches its expiration date, cryptographic signatures created with it will no longer be recognized as valid by statutory portals.
To ensure uninterrupted business operations and avoid compliance deadlines, applicants can initiate their DSC renewal prior to certificate expiration. If your existing FIPS 140-2 Level 2 USB crypto token is undamaged and operational, the newly renewed certificate can be downloaded directly onto your current token, saving hardware token costs.
For complete details on renewal procedures and documentation, visit our dedicated DSC Renewal Services page.
Class 3 DSC Pricing
DSC pricing depends on several specific parameters, including applicant type (Individual vs. Organization), certificate functionality (Signing Only vs. Signing and Encryption Combo), validity period (1 Year or 2 Years), and whether a new FIPS-compliant USB crypto token is needed or an existing token is being renewed.
DNB Digital Solutions provides transparent, competitive pricing tailored to your requirements with complete support for verification and setup.
Frequently Asked Questions
Ready to Apply for Your Class 3 DSC?
Get in touch with DNB Digital Solutions for professional assistance, seamless paperless verification, and fast certificate issuance.