Digital Signature is a specific type of electronic signature that uses encryption technology to ensure the highest level of authenticity and integrity. It doesn’t just say “someone signed this” — it proves who signed it and confirms that the document hasn’t been changed since.
Digital signatures rely on Public Key Infrastructure (PKI). When a document is digitally signed:
- A unique cryptographic hash of the document is created
- It’s encrypted using the signer’s private key
- The result is bound to the document along with a digital certificate issued by a trusted authority
This makes the document tamper-evident, verifiable, and legally robust. If the document is altered after signing, the signature is no longer valid.
Digital signatures are typically required in:
- Financial services
- Legal contracts
- Government and healthcare documents
- Cross-border trade where data integrity and legal enforceability are critical
They’re legally recognised under laws like eIDAS in the EU and ESIGN/UETA in the US — and are fully compatible with MLETR-aligned systems.