Digital signature
                     Digital signature 
Securing the Digital World with Authenticity & 
Trust
Introduction
1, With the increasing use of internet in this technological 
age, online transactions and document sharing is widespread.
2, Digital Signatures are also important to maintain integrity 
and security of the data.
3, A Digital Signature is a form of electronic signature – in 
other words, the digital version of a handwritten signature, but 
much more secure!
Definition
Digital Signature:
A secure electronic system of identification used to ascertain in part 
that an individual signing a document is who he purports to be and 
that the document has not been tampered with after signature.
Key Features:
 Authenticity
 Integrity
 Non-repudiation
What Are Digital Signatures and 
Also How Do They Work?
• Word proposal: A word document is prepared for 
signing.
Hashing: The document is hashed to produce a hash 
code.
Encryption: The hash is encrypted using the private 
key of signer.
Verification: The receiver decrypts and verifies with 
the signer’s public key.
Result: Messing with it makes the signature invalid.
Advantages of Digital 
Signature
• Safe: Forged-proof with the cryptographic 
technology.
✅ Saving: Sign your documents instantly online.
✅ Budget Friendly: No printing or courier costs.
✅ Legal Validity: Valid as per IT Act, 2000 (India).
✅ Eco Friendly: Saves paper.
 Uses of Digital Signatures
 Income Tax Filing
 MCA & ROC Filings
 e-Tendering and e-Procurement
 GST Registration
 Banking & Financial Transactions
 Legal and Business Agreements
Legal Framework
• Regulated by Information Technology Act, 2000 (Section 3).
Certifying Authorities under the control of the Controller of Certifying 
Authorities (CCA), Govt. of India.
• Provides legal recognition that electronic signatures can be used to sign 
documents
Steps to Obtain a Digital Signature 
Certificate (DSC)
• Fill the online application form.
• Submit identity and address proof (PAN, Aadhaar).
• Complete video / biometric verification.
• Get DSC in USB Token or downloadable format
Security Mechanism
• Public Key Infrastructure (PKI) based.
• Uses Private Key (for signing) and Public Key (for verification).
• Any change in the signed document invalidates the signature.
Digital vs. Electronic Signatures
Feature       Digital Signature     Electronic Signature
Security Level     High (encrypted)     Moderate
Legal Validity     Found under IT Act     Depends
Technology     Cryptographic (PKI)      Basic authentication
Verification     Through CA     Simple identity proof
Things to Come with Digital Signatures  
• Integration with Blockchain & AI to improve verification.
• Quick embrace by e-Governance, FinTech, and worldwide 
trade.
• Transition to a fully cashless and secure digital economy.
Conclusion
Digital Signatures are required for secure online business transaction.
They help to establish trust, make transactions more efficient and ensure 
compliance with the law in the digital world.
Adopting digital signature is a move towards the safe, smart and eco-
friendly future.
Thank You for Listening!
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•  Website - https://www.99digitalsignature.com/
• Mobile number -  +91 9873467790