Digital Signatures
Provide secure and authenticated message transmission (enabled by PKE)
Provides a proof identifying the sender
- Important for certain (legal) transactions
Digital Signature:
- Includes the name of the sender and other key contents (e.g., date, time, etc.,)
Use of PKE in reverse (applied to Digital Signature part of the message only)
- Outgoing: Encrypted using the sender’s private key
- Incoming: Decrypted using the sender’s public key
- Providing evidence who the message originated from