What Is Digital Signature Certificate (DSC)?
A digital signature certificate is the electronic version of a physical signature. It verifies the identity of a person or organization while signing documents online. In simple words, it works like a secure digital ID card.
A digital signature certificate (DSC) ensures that online documents are authentic and tamper-proof. When you use a digital signature, encryption technology locks the document. If someone changes it, the system instantly detects it.
An Electronic Signature, also known as “e-signature,” is any electronic method used to sign documents. However, a digital signature certificate is more secure because it uses cryptography and government-approved certifying authorities.
Legal Validity Under Indian IT Law
Under the Information Technology Act, 2000, the Government of India recognizes the digital signature certificate as legally valid. That means documents signed digitally hold the same legal weight as handwritten signatures.
Businesses use a digital signature certificate for:
- MCA filings
- GST returns
- Income tax filing
- Company incorporation
- eTender submissions
- ICEGATE registration
Why Businesses Need a Digital Signature
In 2026, almost everything is online. Whether you’re a startup founder or a corporate executive, a digital signature certificate online application saves time and avoids paperwork delays.
Here’s why it matters:
- Faster approvals
- Secure transactions
- Legal compliance
- Reduced fraud
- Seamless corporate digital signature management
If you’re wondering how to get a digital signature certificate, don’t worry—we’ll cover that in detail below.
How Does a Digital Signature Certificate Work?
Understanding how a digital signature certificate works helps you use it confidently.
Role of Encryption & Public Key Infrastructure
A digital signature uses Public Key Infrastructure (PKI). It involves two keys:
- Private Key – Used to sign documents
- Public Key – Used to verify signatures
When you sign a document digitally:
- The system creates a unique hash.
- Your private key encrypts the hash.
- The recipient verifies it using your public key.
This ensures digital certificate authentication and confirms that the document hasn’t been altered.
Digital Certificate Authentication Process
The process works like this:
| Step | Action |
| 1 | User applies for digital signature certificate |
| 2 | Certifying Authority verifies identity |
| 3 | The certificate is issued in a USB token |
| 4 | User signs document |
| 5 | Receiver verifies signature authenticity |
Unlike a simple Electronic Signature, which may just be a typed name or scanned image, a digital signature certificate (DSC) guarantees encryption-based security.
How to Get Digital Signature Certificate Online (Step-by-Step Guide)
If you’re asking how to get a digital signature certificate, follow these simple steps.
Step 1: Choose the Right Type
Select:
- Individual DSC
- Corporate digital signature
- Government digital signature certificate
- Digital certificate for GST
- Digital signature for startup registration
Step 2: Select a DSC Provider
Choose licensed digital signature certificate providers authorized by the Government of India.
Look for:
- Quick processing
- Secure USB token
- Video verification
- Transparent pricing
If you plan to buy digital signature certificate, always verify the provider’s credentials.
Step 3: Complete Online DSC Application
Fill out:
- Personal details
- Aadhaar/PAN
- Email & mobile
- Organization details (if corporate)
Most platforms offer smooth dsc registration online.
Step 4: Identity Verification
Verification methods include:
- Aadhaar OTP
- Video KYC
- Physical verification (rare in 2026)
Step 5: USB Token Installation
After approval:
- Download drivers
- Install certificate
- Set PIN
- Start signing documents
The entire online digital certificate registration process now takes 1–2 days.
Documents Required for DSC Registration
For successful apply for a digital signature certificate, keep these ready:
For Individuals:
- PAN card
- Aadhaar card
- Passport-size photo
- Address proof
For Companies:
- Certificate of Incorporation
- PAN of the company
- Authorization letter
- Director’s ID proof
For digital signature for company incorporation, ensure all documents match MCA records.
Class 3 Digital Signature Certificate Explained
The Class 3 digital signature certificate is the highest security level available.
It’s mandatory for:
- eTendering
- eProcurement
- ICEGATE filings
- Trademark filing
Why Class 3 Is Powerful
- High encryption
- Strong identity verification
- Suitable for corporate digital signature use
If you’re handling large transactions or government contracts, Class 3 is the safest option.
Best Digital Signature Certificate Providers in 2026 (Comparison Guide)
Choosing the best digital signature certificate provider depends on price, service, and support.
| Feature | Provider A | Provider B | Provider C |
| Processing Time | 24 hrs | 48 hrs | Same Day |
| USB Token | Included | Extra Cost | Included |
| Video KYC | Yes | Yes | Yes |
| Support | 24/7 | Business Hours | 24/7 |
Many providers integrate tools from companies like:
- Adobe Inc.
- DocuSign Inc.
- Smallpdf AG
- Apple Inc.
Before choosing, check:
- Pricing transparency
- Renewal costs
- Technical support
- Token warranty
Government Digital Signature Certificate: Process, Cost & Benefits
A government digital signature certificate is required for official portals.
Process:
- Register on government portal
- Submit DSC details
- Verify identity
- Complete mapping
Cost in 2026
- ₹1,000 – ₹3,500 (Individual)
- ₹2,000 – ₹5,000 (Corporate)
Benefits
- Legal recognition
- Faster approvals
- Secure document filing
- Mandatory for GST
For complete financial and compliance support, you can explore Finaccle Services. A digital certificate for GST is essential for business owners.
How to Sign PDF with Digital Signature Certificate
Now comes the practical part—how to sign PDF files.
Tools & Platforms
Tools: Platforms like Adobe Acrobat, DocuSign, Smallpdf, and native app features (like Apple Preview)
Steps to Sign PDF:
- Insert USB token
- Open PDF in signing software
- Select “Sign with Digital Certificate”
- Choose certificate
- Enter PIN
- Save signed document
Your digital signature now locks the PDF.
Unlike a basic Electronic Signature, this ensures digital certificate authentication and tamper-proof protection.
Electronic Signature vs Digital Signature – What’s the Difference?
People often confuse an electronic signature and a digital signature certificate. Let’s clarify.
| Feature | Electronic Signature | Digital Signature |
| Security | Basic | High Encryption |
| Legal Strength | Depends | Strong Legal Backing |
| Encryption | Not mandatory | Mandatory |
| Authentication | Limited | Verified by CA |
An Electronic Signature may include:
- Typed name
- Scanned signature
- Click-to-sign button
A digital signature certificate, however, uses cryptography and public key infrastructure.
If you need compliance and legal certainty, choose digital.
FAQs About Digital Signature Certificate & Electronic Signature
1. How to get digital signature certificate quickly?
You can complete online dsc application through licensed providers with Aadhaar-based verification. Approval usually takes 24–48 hours.
2. Is digital signature certificate mandatory for GST?
Yes. A digital certificate for GST is mandatory for companies and LLPs filing returns.
3. What is the validity of Class 3 digital signature certificate?
Usually 1–3 years. Renewal is required before expiry.
4. Can I use one DSC for multiple portals?
Yes, a single digital signature certificate (DSC) can be used for MCA, GST, Income Tax, and more.
5. Is an electronic signature legally valid?
An Electronic Signature is valid under the law, but it may not always meet high-security compliance requirements.
6. What happens if the USB token is lost?
You must revoke the existing certificate and apply for a new digital signature certificate immediately.
7. Which is the best digital signature certificate provider?
Choose a government-approved provider like eMudhra or Capricorn for secure, legally valid Class 3 certificates. For faster processing and 24/7 support, Finaccle Advisory streamlines the entire documentation and USB token delivery process. Ensure your provider is CCA-licensed to guarantee compliance for tax filings and e-tenders.
Conclusion: Why DSC Is Essential in 2026
In today’s digital-first world, a digital signature certificate is no longer optional—it’s essential. From GST filing to company incorporation, secure documentation is the backbone of modern business.
While an Electronic Signature works for simple agreements, a digital signature certificate (DSC) provides unmatched security, encryption, and legal protection.
If you’re planning to:
- Register a startup
- File GST returns
- Participate in tenders
- Incorporate a company
Then it’s time to apply for a digital signature certificate today.
It’s secure. It’s fast. And honestly, it just makes life easier.
