HomeworkLib
Question

Answer the following on revised Vigenere Cipher (30pts) Consider a differnet version of the Vigenere cipher...

Answer the following on revised Vigenere Cipher (30pts)


Consider a differnet version of the Vigenere cipher for English text. In addition to letters, assume that there will be three other characters in the plain text: dash (26) and dot (27) changing the encryption function to be under mod 28. Also the key is not allowed to be repeated as in the standard Vigenere cipher. Instead, if the key length is shorter than the plaintext, the key is reversed and concatenated with itself. The pattern continues in the same manner (key and its reverse). Here is an example when the keyword is“Florida”:


Plaintext : FIU-ECEDepartmentRocks. Key : FloridaadirolFFloridaad




Provide the Ciphertext for the above plaintext with this revised Vigenere Cipher.
engineering   Computer-Science   
0 0
Add a comment Improve this question Transcribed image text
Next > < Previous
Sort answers by oldest

Homework Answers

Answer #1

0 0
Add a comment
Know the answer?
Add Answer to:
Answer the following on revised Vigenere Cipher (30pts) Consider a differnet version of the Vigenere cipher...
Your Answer:

Post as a guest

Your Name:

What's your source?

Earn Coins

Coins can be redeemed for fabulous gifts.

Log In

Sign Up

Not the answer you're looking for? Ask your own homework help question. Our experts will answer your question WITHIN MINUTES for Free.
Similar Homework Help Questions

  • Study the VIGENÈRE CIPHER and implemented it with c++ 1.In your program, you should have two...

    Study the VIGENÈRE CIPHER and implemented it with c++ 1.In your program, you should have two functions: encryption and decryption. 2. Use any key you like. (Don't use deceptive in the slides) 3. choose a sentence or a paragraph you like as the plaintext. I have the code I just need the implementation in a different way // C++ code to implement Vigenere Cipher #include<bits/stdc++.h> using namespace std; // This function generates the key in // a cyclic manner until...

  • Computer Science C++ Help, here's the question that needs to be answered (TASK D): Task D....

    Computer Science C++ Help, here's the question that needs to be answered (TASK D): Task D. Decryption Implement two decryption functions corresponding to the above ciphers. When decrypting ciphertext, ensure that the produced decrypted string is equal to the original plaintext: decryptCaesar(ciphertext, rshift) == plaintext decryptVigenere(ciphertext, keyword) == plaintext Write a program decryption.cpp that uses the above functions to demonstrate encryption and decryption for both ciphers. It should first ask the user to input plaintext, then ask for a right...

  • Decrypting the APCO cipher without the key. Decryption without the key is obviously a much more...

    Decrypting the APCO cipher without the key. Decryption without the key is obviously a much more difficult process. Indeed, the purpose of encryption is to make it as difficult as possible for anyone who does not know the key to read the plain text. We will be using an unsophisticated password cracking technique called a brute force attack. A brute force attack on the APCO cipher works by trying every possible four digit key (from 0000 to 9999) and keeping...

  • 3) Out of the following, name which kind of attack you carried out in part 1...

    3) Out of the following, name which kind of attack you carried out in part 1 and part2: a. ciphertext only, b. known plaintext, c. chosen plaintext, d. chosen ciphertext. Explain your answer Problem 3 10 points] A 4-bit long message was encrypted using one-time pad to yield a cipher-text “1010” Assuming the message space consists of all 4-bit long messages, what is the probability that the corresponding plaintext was “1001”? Explain your answer. Problem 4 Assume we perform a...

  • C Program In this assignment you'll write a program that encrypts the alphabetic letters in a...

    C Program In this assignment you'll write a program that encrypts the alphabetic letters in a file using the Vigenère cipher. Your program will take two command line parameters containing the names of the file storing the encryption key and the file to be encrypted. The program must generate output to the console (terminal) screen as specified below. Command Line Parameters Your program must compile and run from the command line. The program executable must be named “vigenere” (all lower...

  • This project will use The Vigenere Cipher to encrypt passwords. Simple letter substitution ciphers are ones...

    This project will use The Vigenere Cipher to encrypt passwords. Simple letter substitution ciphers are ones in which one letter is substituted for another. Although their output looks impossible to read, they are easy to break because the relative frequencies of English letters are known. The Vigenere cipher improves upon this. They require a key word and the plain text to be encrypted. Create a Java application that uses: decision constructs looping constructs basic operations on an ArrayList of objects...

  • JAVA Problem: With the recent news about data breaches and different organizations having their clients’ information...

    JAVA Problem: With the recent news about data breaches and different organizations having their clients’ information being exposed, it is becoming more and more important to find ways to protect our sensitive data. In this program we will develop a simple tool that helps users generate strong passwords, encrypt and decrypt data using some cyphering techniques. You will need to create two classes. The first class is your driver for the application and contains the main method. Name this class...

ADVERTISEMENT
Free Homework Help App
Download From Google Play
Scan Your Homework
to Get Instant Free Answers
Need Online Homework Help?
Ask a Question
Get Answers For Free
Most questions answered within 3 hours.
ADVERTISEMENT
ADVERTISEMENT