Information Technology Act, 2000
Digital Signature vs Electronic Signature: The Difference Explained
The Act of 2000 knew only the digital signature; the 2008 Amendment opened the law to any reliable electronic signature technique, making the digital signature one species of a wider genus. The distinction is constantly confused, and it decides what technology may be used and how it is proved. Topics 37 and 129 built the sections; this note, as asked, is the dedicated comparison.
1. Genus and Species
Figure 1: The electronic signature and its digital species
- Digital signature: Section 3. A specific technique: authentication of an electronic record by an asymmetric crypto system and hash function that envelop and transform the record, the original 2000 mechanism, always key-pair and certificate based (Topic 100)
- Electronic signature: Section 3A. The genus: a subscriber may authenticate a record by any electronic signature or authentication technique that is considered reliable and is specified in the Second Schedule, the 2008 technology-neutral widening; the digital signature is simply the first species within it.
- The reliability gate: Section 3B. Either way the technique must be reliable under s.3B, linked to the signatory, under his control, with alteration to signature and information detectable, so openness does not mean anything goes (Topic 129)
2. How They Differ in Practice
- Technology. A digital signature is always asymmetric crypto with a hash; an electronic signature may use any notified technique, presently e-authentication using Aadhaar or other e-KYC, so the genus is open and the species fixed.
- Infrastructure. A digital signature needs a Digital Signature Certificate and the certifying-authority trust chain (Topics 50, 140); an electronic signature may be created through eSign, authenticating by e-KYC and issuing a one-time key without the user holding a long-term certificate or token (Topic 135)
- Legal effect. Both carry the same legal recognition under s.5, and a secure digital signature additionally earns the evidentiary presumptions, so the choice is about technology and convenience, not about validity (Topics 42, 134)
- The inclusion. Every digital signature is an electronic signature, being a reliable technique within s.3A; not every electronic signature is a digital signature, since other reliable techniques qualify, the sentence that answers the comparison.
⚠ Exam trap Lead with the inclusion sentence, every digital signature is an electronic signature but not the reverse, and attach the sections, s.3 for the digital signature, s.3A for the electronic signature, s.3B for the reliability both must meet. Keep the technology precise, asymmetric crypto and hash for the digital signature against any Second Schedule technique for the electronic signature, and note the 2008 widening as the reason the genus exists at all, with both enjoying equal legal recognition under s.5. |
3. Frequently Asked Questions
What is the difference between a digital signature and an electronic signature?
A digital signature under Section 3 is one specific technique, authentication by an asymmetric crypto system and hash function, created with a key pair and a Digital Signature Certificate. An electronic signature under Section 3A is the wider genus, any electronic signature or authentication technique that is reliable under Section 3B and specified in the Second Schedule, presently e-authentication using Aadhaar or other e-KYC, which can be used through eSign without a long-term certificate. Every digital signature is an electronic signature, but not every electronic signature is a digital signature, and both enjoy equal legal recognition under Section 5.
4. Related Topics
- Topic 129: Section 3B and the Second Schedule. The reliability gate and the techniques.
- Topic 135: CCA and eSign. The electronic-signature route in operation.