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So now in this particular program, we are trying for a particular and that is there because we're told

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the program returns little snippet of the decrypted message for the user to confirm that it has found

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the right.

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OK, now, in this example, the message looks promising.

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And when the user confirmed the description is correct by entering the the program, then return the

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entire hack the message.

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OK, now you can also see it by the biographical note about OK that we have.

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Well, we basically get the four percent.

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And if the decryption is false positive, the user can press anything else and the program will still

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continue to try for other keys.

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OK, now the program again runs and skips the correct decryption, replacing anything other than the

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00:00:47,880 --> 00:00:54,060
the program assumes that it did not find the correct decryption continues its brute force approach to

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the other possibilities available.

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So eventually the program runs through all the possibilities and then gives up informing the user that

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it was unable to have the ciphertext.

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OK, now let us take a closer look at the source code that we have used for creating this program.

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OK, so the first thing we have done is importing the modules in the first line of the code would tell

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the user, what about this program?

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We basically do OK.

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We are importing several modules that we have written or seen in the previous session that is of a paperclip,

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checking them all 16.

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Now, the transposition cycle Hackl program containing approximately some lines of code is fairly short

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because of it.

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Much of it basically exists in other programs that we are using as the module.

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So using a multiline string with triple codes like if Ifill's use instead of the single quotation marks,

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if you use this triple line or triple double code that is known as our multiple multiline string using

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the Republicans.

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OK.

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Now notice that if you are having a very long string, then triple code strings.

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We also call them as multiline strings because the span multiple lines and can contain some line breaks

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within the Somali line.

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Strings are basically useful for putting a large string into a program for support.

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And because single and double codes don't need to be escaped within them, we can see an example of

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00:02:21,870 --> 00:02:26,350
this multiline string by entering some following text in the interactive shell.

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So if we go back here and we try to endorsee SDR is equal to, we give you a double quotation marks.

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Sadiel, John Placentals.

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We say, why did you dress up my hamster

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in doll clothing?

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Then say, I look at Mr. ABC and think that I know this was John's doing and then give thanking you

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see Elliman and then we end this quotation mark.

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Now we give here again, say, in bracket STF, so we get the same text in the same format.

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But OK, notice that this particular string value like of a ciphertext string expands multiple lines.

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Everything after the opening triple code will be interpreted as part of the string until the program

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00:03:35,730 --> 00:03:37,680
reaches the course, ending it.

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00:03:37,860 --> 00:03:44,520
OK, so you can make a multiline string using either for like three double chords, characters or three

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00:03:44,520 --> 00:03:45,110
singlehood.

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00:03:45,120 --> 00:03:51,900
So even doing the three and ending it with three single chords will also be possible or do it with double

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00:03:51,900 --> 00:03:52,660
quotation marks.

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00:03:53,190 --> 00:03:57,740
OK, anyways, as you wish to do now, let us go back to our program here.

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00:03:58,110 --> 00:04:02,240
Now come to displaying the results of the hacking, the particular message.

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So the ciphertext hacking code exists inside of a particular method that is hack transposition, astar

52
00:04:10,230 --> 00:04:16,410
function vacay, which we are calling it over here and storing the value which is written by this function

53
00:04:16,650 --> 00:04:23,600
in the variable hacked message is for this function will take one string argument, the encrypted ciphertext

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00:04:23,610 --> 00:04:25,620
message that we are trying to hack.

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00:04:25,620 --> 00:04:31,560
And if the function can hack this hypertext, it returns a string of the decrypted Asgeir, otherwise

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00:04:31,560 --> 00:04:33,890
it returns the value that is none.

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So if you look at over here, we are saying hacked message Asgeir is equal to calling the method, passing

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00:04:39,960 --> 00:04:46,680
the parameter, checking if it is equal to non-veteran fail to hack encryption is if it is not equal

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00:04:46,680 --> 00:04:52,190
to null, then you're saying copying the hack message to avoid printing the hack message and then using

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good copy to copy them is OK.

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So over here I'm calling the function to return the hacked message.

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If the attempt is a.

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Facebook or the non-value is an attempt, is unsuccessful, then it stores the returned value in the

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00:05:06,690 --> 00:05:14,940
message hack is gesture and the next line tells the program what to do if the function is unable to

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have deciphered.

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So if none was stolen, the variable hacked and the program lets the user know by printing that it was

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unable to break the encryption.

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And the next lines after that shows what the program does of the function is able to hack the ciphertext.

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That is the if part in the as we print the decrypted message to the clipboard and for this code to work,

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00:05:40,530 --> 00:05:48,870
we also need to define the hack transposition function, which we going to do after the next line of

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00:05:49,080 --> 00:05:49,960
copying it to the.