All right, we're almost going to end this wonderful section of cryptography, so this is the second
last lecture and in the next lecture we'll obviously talk about the certificate authority.
So what is actually SSL?
Well, SSN stands for all these secure sockets layer.
Now, this is actually a protocol which is which works at the application layer of the OS model and
the model that is the network model.
So if you have knowledge about networking, you might have heard of ESSES it.
Basically, SSL was developed by Netscape for managing the security of messages.
So whatever you send over the Internet, obviously it should be protected from hackers who are about
to carry out some sniffing of your messages.
Now SSL uses the Odyssey algorithm, which is the public will go to them to encrypt the data.
So we have seen Oddisee algorithm previously in this section.
It's basically it's a measure taken to protect data, whatever you are sending over to the Internet.
So the first step is actually client installs or client messages, the server to initiate the communication.
All right.
It's similarly to a man to man conversation.
Someone has to initiate the conversation.
So the client initiates the conversation for the SSL or dials Yellowstone's for transport layer security
assistant and TSL work together again.
Uh, TLT is a protocol which is actually used to establish a secure connection.
So SSL is used for secure sending, but yellers is used for establishing a secure connection between
the sender receiver.
So once a client initiates the SSL or tearless communication server sends back and encrypted public
key certificate.
So what is the certificate we have seen now?
Client checks, the certificate it creates and then sends the encrypted key back to the SO.
So you have to send a confirmation message so that the server will also know that you have got the certificate
again server decryption key and delivers the encrypted content with the key to the client.
And again, client decrypt the content, completing the assistant idealist handshake.
Again, it's public encryption where you end up with something and you decrypt another key basically
for secure sharing of messages.
A peerless handshake allows the client and server to authenticate each other.
So, uh, selecting the encryption algorithm, the proper encryption algorithm, and you have to exchange
the key, as we have discussed here, prior to the exchange of data.
So before you exchange any actual data, you have to exchange the keys.
So you can see that server has the key right here and the server sends an encrypted public.
This is how this all works and deals works, and in in the last lecture of this section, we are going
to talk about certificate authority.
It's going to be a very short lecture of two to three minutes.
You just have to understand what exactly is a certificate authority.