So before going in to some algorithms, you should know about some terminology in the cryptography.
So first one is the protection.
This is the actual message Sender wants to send to receiver.
So this actual message I want if I want to say hi to you, see what I say?
Hi.
Hello.
That is called a text and a ciphertext is this is unintelligible text and no person cannot understand
this.
So I perform some operation on my plain text to decipher text and I will send this over to my receiver
and encryption.
The process of converting this print into ciphertext is called encryption.
OK, the actual words I'm doing on a print is called encryption.
After encryption, I get this over text.
And the decryption the process of converting ciphertext into plain text is called decryption.
So on every single said that he should perform this operation called encryption, and this process automatically
comes with the same protection, the plaintext.
So encryption should be performed at the central side and the convention will be performed at the site.
And is the shadow of understanding how cryptograms works and finding weaknesses.
This is this is exactly the crucial, but it's not capricious, don't know how this process has worked.
I can confirm decryption, but.
Cryptanalysis is very often training how algorithms and finding weaknesses.
So if I use this week mathematical models are just simple mathematical model, uh, for converting the
production design protection than any other can, just these algorithms.
And they can just decipher their own way, even though the 100 percent decipher the text, they can
get the intention.
What I want to send the message to the receiver.
So the person who does this cryptanalysis process is called cryptologist.
So we have this to with the.
So he's a mathematician and perished because he does not know how it works.
But he studies the algorithm and he observes that some ciphertext, how it's being converted from the
plaintext and by finding the weaknesses and he found he discovered the Enigma cipher that cryptanalysis
works.
And the first one you're going to see about different emphasis substitutions ever, so the name implies
the substitution.
So we are substituting something instead of our plain text.
So these are simply some other characters.
So these are assumptions.
I was.
So these obstetrician's are good, but also somewhat easy to crack, like if I put every other substitution,
I got ASCII characters, substitution, I get so many paragraphs.
But in that are paragraphs one paragraph, maybe overprotection.
So this is like basic sofas and next on is blocks for these sofas operate on some breakoff bits.
So you take some of that to do with Artie Shaw.
And this I was operates on those bits.
Examples are the servants and Sagara atoms.
And Semitic and Christians, the same user at the encryption and as well as the Christians.
So there is some key.
You use the encryption inside and outside the so.
So this key is very like part of this mathematical operation, performing on a plain text.
And with this key, only the receiver can decrypt at the other.
So one good thing about this encryption that these encryption are fading fast and also very fast for
the future, but the disadvantages, if the key was seen or got triggered by another person, they can
use the same key for the decryption so that you need to safely secure the key to the receiver.
So.
And the next one is asymmetric encryption, public use for encryption and private keys for the future.
So in these encryption, we used to kiss one Nisga'a public and leaves.
It can be used by anyone because public key is used for encryption only even the attacker.
Our hacker knows this publicly.
He cannot do anything.
And the private key is used for decryption.
So this is a very important key.
You need to safely.
Sent to the receiver or receiver should also should know already this private key is used only for the
creature.
If this is known by a hacker, then this encryption, since he knows the plaintext.
So this private key should be stored securely.
The next one, we're going to see the ARE certificate, these are difficult times to establish a clear
connection between the two.
So, for example, is this a certificate so that you can see this as a certificate in your website?
Like a..
Yes, like six years ago.
Wondering about encryption and so on.
So even though if you're using plaintext protocols like it should be, but if you have these SSL certificate,
you can establish a secure connection between your secure innocence and encrypted connection between
your so your data will go encrypted and also acrobatically the group at the receiver.
That is a the certificate.
And I always want to associate with it for websites.
So these are the basic terms you need to know to get started on the cryptography.
I think if there is another tool we have, we are coming to our next straight our next two years, then
I will explain that in that video.