A digital signature is a special type of online signature that uses encryption, digital certificates, and strong identity verification. It is very secure and trusted by banks, government offices, and big companies.
In simple words, a digital signature proves that:
• the document is real,
• the signer is genuine,
• the document is not changed after signing.
Technical Part
A digital signature uses:
• Public Key Infrastructure (PKI)
• Digital Certificate (DSC)
• Identity validation
This makes the signature tamper-proof and legally strong.
Examples
You use digital signatures for:
• signing PDF documents
• signing legal forms
• GST filings, MCA forms, income tax returns
• government and corporate agreements
This explains what is digital signature and how it works in simple form.