So now let's talk about this transpositions was I did not mention the definition in the terminology,
so I now I'm going to explain this this translation.
So I the position operational plaintext characters.
So in substitution, so first we are substituted the Predix characters by some other characters, but
in this we are not going to substitute a new characters, but we will change the position of those characters.
So and it is easy to do because it's simply rearrangement of these characters.
So let's see some examples of this.
So which comes under translucence.
I was the first one is called transposition cipher.
And in this we will construct a metrics with number of columns equal to kids.
Keyzer And so we will take a plaintext and we will take also a key Tochigi.
So this key is a half of it consists of half of it and then write the plain text in that matrix.
So after building the multitude number of columns said the current is four.
Then we will create a four ColorMatrix.
That depends on the plaintext.
And we write in those columns laneways, the plaintext and the ciphertext from writing columns according
to the alphabetical order of the key.
So the key contents ABC then the first column under it is written first and the next alphabetical order
of the column is conter, and that is the column is written next.
So I think this will not make sense.
I will explain with an example.
So we we have this plaintext.
Meet me at midnight and the keys fancy.
So what we're going to do is we are going to create a matrix are the simple rules and columns with fancy
Ozeki like you create a fancy at the top and the length of the keys we create the econometrics, the
rules.
We do not know.
We just keep on reading in this in that matrix.
So this is the Matrix.
First, I have written the fancy, very fancy and I also given the order of these keys, alphabetical
order in the fancy way we get the first and the second and they have and then end in and then rushed
way.
So we I have given the numbers.
One, two, three, four.
Now what I'm going to do in this matrix, I'm going to read the plain text.
So the index is.
And I'm going to meet him and after that, I cannot write further because there are only four columns
I need to read in the next.
Meet me at next, but not so in that I can I help write the plain text.
And what I'm going to do is I want to write the columns elements, only the column elements.
So the first column elements are easier to write.
This is are considered as first.
The alphabetical order is of use one and it comes four straight.
That's what we do to write these columns, alphabets, p, e, etc. That is for some part of the ciphertext.
And we need to consider the second column.
That is this one P and Nightwatch, this one.
And we have to write all these alphabets in the column in the laneways.
And and if we can, the next one, it goes by three young Megson and the four EPMD and unmuted.
And we did so.
So in this way we have we can save Egen and the plaintext in this ciphertext using this current transportation
so far in this case.
We do not substitute any new value into this, we just arranged the order of this pretextual use rate,
we hold the key and we have constructed a matrix of different.
Of the column of the column length of this that is free and then we hold it in the prediction that matters
and what we have done is we do not write or the.
All right, right past the metrics, but we have created a new rose, but the column should maintain
the length of the key, that is five columns.
We can read any number of rows and then we will return the ciphertext as the first column and the second,
third, fourth and fifth.
So this is the simple column, transportation metrics.
You can also do the retransmission metrics.
All you have to do is you have to write the fancy as a rose and then in the current index.
So that is the reverse of this current transmission metrics.
So this one is the example of the transposition ciphers and the next one is relevant.
So I'm not going to add some texture because I'm so tired in making these people is OK.
So I'm going to explain one image.
The plain text is this is a secret message.
So this is some text.
I want to send it to receiver and this is relevant encoding key.
OK, key is the number.
And therefore, we need to create four roles and we need to write this message as it a.
If you control this message, the secret message you can see here is written in the first row, first
column, and it has written down in the second row.
And I in that address, in the photo and then we did not read, I hear.
But we have written here like to go like this with like Montaigne's.
Like ups and downs, ups and downs, but you're not you do not break this line, right?
So this is how you rate this is a secret message and then it ends here.
Now, what we're going to do is ciphertext.
You write every element in the room, so you have to be ready yet PJI and it just as e e so that will
be our message.
Cipher text message.
You can see the here and Jesus Yomi here and then ia e r e s IRS and then see us.
So that's how you you create a site for dictionaries and so forth.
So I will explain it again for McClarty first.
Right.
The plain text and then according to the key, create those many rules and what we want to lose from
staff.
You need to read the exact pattern.
So like this.
Down, up, down, up, down, up and down.
So you need to maintain this zigzag pattern.
You should not break this pattern.
You should not read.
I hear you should write according to this chain.
And after you heard it and you need to consider the rules, the elements are the rules for and the second,
third and fourth rule, if you combine all those rules where you get the same protection.
So these two are the other one come these two comes under the transposition ciphers.
And I have showed you how transposition ciphers works and they just rearrange just the plain text that
does not introduce any new character.