What is Digital Signature? | Features, Advantages & Uses

Discover what is a digital signature, how it works, its benefits, and how to get a Digital Signature Certificate (DSC) online in India.

In today’s fast-moving digital world, everything from banking to company registration has shifted online. But as paperwork becomes electronic, the biggest challenge is ensuring that every document is authentic, secure, and tamper-proof.

This is exactly where a digital signature becomes essential. A digital signature is a secure electronic authentication method used to verify the identity of a signer and ensure that an online document has not been altered.

In India, digital signatures are legally valid under the Information Technology Act, 2000 and are widely used for company registration, MCA filings, GST returns, income tax filing, e-tendering, and business compliance.

What is a Digital Signature?

A digital signature is an encrypted electronic authentication method used to verify the authenticity and integrity of digital documents and online transactions. It ensures that the signer is authentic, the document hasn’t been tampered with, and the transaction is legally binding.

Unlike a scanned hand signature, a digital signature uses public-key cryptography to link a person or entity to a digital document with high integrity and security.

How Does a Digital Signature Work?

how does a digital signature work
  • A hash value is created from the document.
  • The hash is encrypted using the signer’s private key.
  • The recipient verifies the signature using the public key.
  • If the hash matches, the document is authentic.

For further details, you can read our updated guide on how to make a digital signature.

Legal Validity of Digital Signatures in India

Digital signatures are legally valid in India under the Information Technology Act, 2000. Section 3 of the Act defines digital signatures, and Section 35 mandates the issuance of Digital Signature Certificates (DSC) by Licensed Certifying Authorities (CAs) such as:

  • eMudhra
  • Sify Technologies
  • NSDL e-Governance
  • Capricorn CA

These certificates verify your identity and allow you to sign documents securely online.

Digital Signature Example

So, let’s understand the Digital Signature using a simple example. Whenever you put in your details (your id and password) to log in to any website, the data that you enter starts working as your digital signature. It helps in checking that it’s you who is trying to log in to that site, and once verified, you get access to the site.

Read More: Indian Company Registration

Steps To Acquire Digital Signature Online

You can acquire your digital signature digitally by just following these easy steps mentioned below:

Step 1: Enter all the details in the application form.

Step 2: In the next step, you will have to fulfil the payment requirement. Once your application form is filled out, you’ll be taken directly to the payment gateway.

Step 3: Click on submit and send your document. Then take a print of your application form and attest the xerox copies of your documents to it. If your e-signature falls in the individual section, then you’ll have to attach a photo, identification evidence, and residential proof with the form.

Step 4: Once your documents are checked and verified, you can download the certificate. You will get your DSC via email, and also the details on ways to download it and the needed password as well.

Uses Of Digital Signature

Digital signatures have become an important tool in the modern digital landscape, offering secure and legally binding ways to authenticate documents and transactions. 

Here are some key uses of digital signatures:

uses of digital signature
  • Secure Document Signing – Used in contracts, agreements, and official documents to ensure authenticity and stop counterfeiting.
  • E-Governance & Compliance – Required for filing tax returns, company registrations, and other government-related paperwork.
  • Banking & Financial Transactions – Used in loan approvals, online banking, and secure fund transfers.
  • Legal & Corporate Agreements – Enables seamless signing of NDAs, business contracts, and employment agreements.
  • E-Tendering & Procurement – Essential for businesses participating in electronic bidding and government tenders.
  • Healthcare & Insurance – Secures patient records, prescriptions, and insurance claims.
  • Education & Certification – Used to verify student credentials, diplomas, and certificates.

Want to make and add digital signatures to your emails? Read our detailed blog today.

Features of Digital Signature

Now that you have understood what a digital signature is, what its uses are, how to get one, and more, it’s time for you to learn more about its features.

So, let’s get started:

Better Workflow

Using a digital signature has proven to enhance the workflow and efficiency in a workspace. Another feature is that tracking documents gets better, and also saves time.

User Experience

A firm is bound to get a good user experience on using e-signatures via its quick function and improved data security.

Authenticity

Just like hand signatures, digital signatures also hold a similar value. The procedure is known to confirm the correctness of the sign via several methods. So, it can easily compete with any signed paperwork in court.

Advantages of Digital Signatures

The advantages of digital signatures are as follows:

  • Security: Digital signatures include security features to guarantee that an official record hasn’t been modified and that signatures are genuine. 
  • Trustworthy: You can adhere to legal requirements all across the world with the use of digital signatures protected by digital certificates provided by independent suppliers.
  • Saves time: Digital signatures make it easier for companies to obtain and sign documentation rapidly by streamlining the laborious processes involved in traditional document signing, storage, and exchange.
  • Cost reductions: By becoming electronic, businesses may conserve money on the materials, labor, employees, and office space traditionally required to store, handle, and transfer papers.

What is a Digital Signature Certificate?

A DSC, digital signature certificate, is filed by the official bodies, and by the authority in charge. The DSC comprises information concerning your identity, like your email, name, address, etc. It is known to form your identity as you build your firm or when you pass any transaction online. The papers that you submit digitally are verified via this signature.

Where is a Digital Signature Certificate (DSC) required?

There are several instances where you can put the DSC into use.

Some of them are mentioned below:

  • To file the ITR online
  • To fill the company incorporation digitally
  • To fulfill e-Attestation by Company Secretary, Cost Accountant, and Chartered Accountants
  • To digitally fill government tender
  • To fill copyright requests and trademarks online
  • To digitally sign the contracts and deals

Read More: Business Registration Number

Types of Digital Signature Certificates (DSC) in India

DSCs are categorized based on usage:

DSC TypePurpose
Class 1Verifies email and contact information (rarely used now)
Class 2Used for filing income tax, MCA forms (being phased out)
Class 3Mandatory for e-tendering, e-bidding, e-auctions
DGFTFor exporters/importers dealing with the Directorate General of Foreign Trade

Note: From January 2021, only Class 3 DSCs are issued for individuals and organizations.

Also Read: Types of Digital Signature

Digital Signature Under The Indian Law

Now that you have some information about the digital signature, you may wonder if it is authenticated and verified by Indian law or not. Don’t worry, we’re here to solve all your doubts. 

As per the IT Act of 2000, under Section 3, digital signatures are legal. The details about it are explained in Section 35. It has been stated that anyone who files for a digital signature certificate should ensure having formed the digital signature.

What distinguishes an electronic signature from a digital signature?

Digital signatures are distinct from electronic signatures, despite the fact that both of them are used to sign documentation electronically

Listed below are the differences between a digital signature and an electronic signature:

FeatureDigital SignatureElectronic Signature
SecurityHigh encryptionBasic authentication
Legal StrengthStrongerModerate
VerificationCryptographicConsent-based
Tamper DetectionYesLimited
Common UsageMCA, GST, tendersContracts, approvals

Conclusion

In today’s society, digital signatures are becoming more and more widespread. This is because, compared to paper signatures, digital signatures provide a more practical and efficient way to electronically sign documents. They are a far more secure method of document signing and offer a variety of advantages, including time and money savings, among others.

For any further queries regarding digital signatures, contact our specialists at OnDemand International. We would be happy to assist you with your queries and further guide you in acquiring a digital signature certificate. 

FAQ’s

Does registering a business in India require a digital signature?

Indeed. In India, a Digital Signature Certificate (DSC) is required for business registration. To digitally sign and submit incorporation documents on the Ministry of Corporate Affairs (MCA) portal, directors and authorized signatories must utilize a Class 3 Digital Signature Certificate.

What distinguishes an e-signature from a DSC?

A DSC (Digital Signature Certificate) uses cryptographic encryption technology issued by licensed Certifying Authorities to securely verify identity and document integrity.
An e-signature is a broader term for electronically signing documents and may not always use encryption-based authentication. DSCs offer stronger legal validity and security for government and compliance filings.

Can foreigners obtain a digital signature in India?

Yes. Foreign nationals and foreign directors can obtain a Digital Signature Certificate in India for company incorporation, MCA filings, and business compliance purposes. Depending on the applicant’s nation, notarized or apostilled documents, passport copies, and proof of address may be needed.

What is the cost of a Class 3 DSC in India?

The cost of a Class 3 Digital Signature Certificate in India generally ranges between INR 1,000 to INR 5,000, depending on the validity period, token requirement, certifying authority, and whether it is issued for an individual or organization.

What paperwork is needed in order to receive a Digital Signature Certificate (DSC)?

The commonly required documents for a DSC application include:
1. PAN Card or Passport
2. Aadhaar Card, Voter ID, or Driving License
3. Passport-size photograph
4. Email address and mobile number
5. Address proof
6. Passport and visa documents for foreign applicants
Additional notarization or apostille requirements may apply for international applicants.

Is Aadhaar mandatory for obtaining a DSC in India?

No, obtaining a Digital Signature Certificate does not require Aadhaar. A passport, voter ID, or driver’s license are examples of other identity and address-proving documents that applicants may utilize. However, the quickest verification process is typically Aadhaar-based eKYC.

Can one DSC be used for multiple businesses?

Yes. A single Digital Signature Certificate can generally be used across multiple companies by the same authorized individual or director, provided the DSC is valid and properly registered with the respective government portals, such as MCA or GST.

anamika sharma
Anamika Sharma

Anamika sharma  is a trusted advisor with over 12 years of experience helping entrepreneurs and businesses enter and thrive in the Indian market.

Articles: 2090