A digital signature doesn’t log you into anything. What it actually proves is that a document hasn’t been touched since you signed it.
🏛️ Must Know
What a Digital Signature Actually Is
- Not the Certifying Authority Record A digital signature itself is not an electronic record that identifies the certifying authority issuing it. That description fits a Digital Certificate instead.
- Not a Login Method A digital signature also isn’t typically used as a proof of identity to log into internet servers or services.
- Confirms Document Integrity A digital signature genuinely is an electronic method of signing a document that also confirms its original content is unchanged.
- Correct Answer Only the third statement is correct. The answer is 3 only.
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📘 Good to Know
How a Digital Signature Actually Works
- Built on Public-Key Cryptography A digital signature is created using the signer’s private key. Anyone can verify it using the matching public key.
- Detects Any Tampering If even a single character of the signed document changes afterward, the signature verification fails, revealing the tampering.
- Different From a Digital Certificate A Digital Certificate is the electronic record identifying a certifying authority. It vouches for the identity behind a digital signature.
📝 Previous Year Questions
UPSC CSP 2019 — What a Digital Signature Actually Confirms
- UPSC 2019 A digital signature confirms a document’s content is unchanged; it is not itself the certifying-authority record, nor a general internet login method. See UPSC CSP 2019 GS Paper I, Q94. View this question.
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🌟 Great to Know
Why India Built a Legal Framework Around This
- Recognised Under Indian Law The Information Technology Act, 2000 gives digital signatures legal recognition. It treats them as equal to handwritten signatures for many official purposes.
- eSign Makes It Accessible India’s eSign service lets citizens digitally sign documents online using Aadhaar-based authentication, without needing a separate hardware token.
- Connects to Other PYQ Facts This same electronic-authentication theme also underlies UPSC questions on Aadhaar’s own open APIs.
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