Looking deeper into message digests

- Hash values are helpful in providing…quality digital communication.…We can provide Integrity.…This ensures the message has not…been modified in transit.…For this, we use a hash.…Authentication, ensures the message…originates from the sender.…From this, we use the same shared key…and create a message Authentication code.…A non-repudiation and accountability.…This ensures the message originated…from the sender but here we use a digital signature.…

And a public key and a private key.…Keep in mind the services do not provide…confidentiality as the messages are not encrypted.…Lets look at Integrity.…With Integrity, a hash creates a fingerprint…of the original message.…And this is called a Message Digest.…How this works.…Well we start out with the original message…as we see in yellow.…We create the hash value which is called the Digest…and attach it to the message.…

This is then transmitted to the sender.…The sender then takes the original message…and creates a Digest.…Pulls of the Digest that was sent and compare.…If they're equal, then we know that…