From the course: Learning Cryptography and Network Security
Join today to access over 22,600 courses taught by industry experts or purchase this course individually.
Using digital signatures
From the course: Learning Cryptography and Network Security
Using digital signatures
- [Instructor] A digital signature provides message authentication using public key or asymmetric encryption. This can provide assurance of authentication with minimal processing. Let's step through the process of creating a digital signature. Alice needs to send Bob a message. Now here we see Alice on the left hand side with a public key and a private key. A hash function is used to create a message digest, which is a fingerprint of the message. The message digest in encrypted using Alice's private key, which then becomes the signature. The encrypted message digest is appendant to the message. The message is then sent to Bob. Now once it gets to Bob, Bob takes the message and generates the message digest. The encrypted message digest is decrypted using Alice's public key. And then the two digests are then evaluated. If they are the same, Alice's signature is verified. A digital signature can provide sender…
Practice while you learn with exercise files
Download the files the instructor uses to teach the course. Follow along and learn by watching, listening and practicing.
Download courses and learn on the go
Watch courses on your mobile device without an internet connection. Download courses using your iOS or Android LinkedIn Learning app.