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日期:2022-03-02 11:15

ROW TRANSPOSITION CIPHER IMPLEMENTATION

1) Using any programming language of your choice implement the Row Transposition

Cipher encryption algorithm. [15 marks]

2) Specifications: The program should take two inputs 1) Message M 2) A word w of

length k. The number of columns in the row transposition matrix will be k, and the

columns in the matrix will be read in the alphabetical order of the letters in w. The

program should then create the row transposition matrix and create the encrypted

message C.

In coding the above, please note the following

• Ignore spaces in the input text

• You can write your code to be case insensitive – convert all input to lower case

• In order to make decryption easy, pad any empty spaces in the last row of the

row transposition matrix with the character X

• Your final output should include M,w and C

3) What will be the decryption algorithm for a Row Transposition Cipher? Write down

the pseudocode for the algorithm. [10 marks]

4) Using any programming language of your choice implement the Row Transposition

Cipher decryption algorithm [15 marks]

5) Specifications: The program should take two inputs 1) Encrypted Message C 2) The

word w of length k that was used in encrypting the message. The program should then

create the row transposition matrix and create the decrypted message M.

In coding the above, please note the following

• You may or may not choose to remove any characters used for padding

• Since spaces were removed from the plaintext before encryption they do not

have to be reinserted after decryption

• Your final output should include C,w and M

Test 1 (Encryption) [5 marks]

1) Using a w value of NYITV use your code to encrypt the following text:

“CRYPTOLOGY IS THE PRACTICE AND STUDY OF TECHNIQUES FOR

SECURE COMMUNICATION IN THE PRESENCE OF THIRD PARTIES

CALLED ADVERSARIES.”

2) Output your results

Test 2 (Decryption) [5 marks]

1) Using a w value of NYITV use your code to decrypt the following text:

“eroohalpsmeptroohalsefxphtnlefhhxtwstiiiieoecrastitosplmgeasentmitrasnefylypn

hiasnetoiroitaetaxoeetonicrasetltesnicrfwmurnhrrhitrcrxhtpipsrmaimiitpiphlaleiucci

ptotpe”

2) Output your results

Submission

1) Submit the following documents separately in CANVAS by the deadline. NO ZIPPED

FILES ALLOWED

1) All your code files

2) A detailed README file, which should explain how to run the code with sample

input and output. If you are unfamiliar with READMEs you can find an

introduction here https://www.makeareadme.com/ , here

https://medium.com/@meakaakka/a-beginners-guide-to-writing-a-kickassreadme-7ac01da88ab3

and here

https://www.youtube.com/watch?v=RZ5vduluea4. Note that the README file you

submit for this project need not be complex, it only needs to at least explain how

to compile the code and run the code with examples. [5 marks]

3) Your executable file and your DOCKER file. Please see the file DOCKER

INSTRUCTIONS for information on how to create your docker file.[10 marks]

4) A report (which should include your answer to the test results with screen shots)

5) Note that your submission will be checked for plagiarism. All submissions with

verified plagiarism cases will graded 0


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