Knowledge Base around pdf digital signature

A Digital Signature is a cryptographic electronic signature used to verify the identity of the signer and confirm that a digital document has not been altered after it was signed. It is created using a private key and verified using the corresponding public key through Public Key Infrastructure (PKI). In India, Digital Signatures are legally recognized under the Information Technology Act, 2000 and are widely used for government filings, contracts, compliance, and secure business transactions.

A Digital Signature Certificate (DSC) is a secure digital credential that verifies the identity of an individual or organization when signing electronic documents or accessing online services. It uses Public Key Infrastructure (PKI) and cryptographic technology to create legally recognized digital signatures, protect document integrity, and authenticate the signer. In India, Digital Signature Certificates are issued by licensed Certifying Authorities (CAs) operating under the regulatory framework of the Controller of Certifying Authorities (CCA).

A PDF can be digitally eSigned by uploading it to a trusted eSign platform, verifying your identity, placing the signature where required, and completing the signing process using a Digital Signature Certificate (DSC) or Aadhaar-based eSign. The signed PDF becomes tamper-evident and can be verified by anyone using standard PDF readers.