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Welcome to the CSE142 Encryption Machine The program lets you encrypt a message with a key for your recipient to decrypt! Encrypted messages use a shared keyword to decrypt. Enter key: cseonefortytwo "cseonefortytwo" has been encrypted to: fvhrqhiruwbwzr How many words is your message? 4 Next word: computer "computer" has been encrypted to: frpsxwhu Next word: science "science" has been encrypted to: vflhqfh Next word: is "is" has been encrypted to: lv Next word: awesome "awesome" has been encrypted to: dzhvrph Message fully encrypted. Happy secret messaging!

Welcome to the CSE142 Encryption Machine The program lets you encrypt a message with a key for your recipient to decrypt! Encrypted messages use a shared keyword to decrypt. Enter key: cseonefortytwo "cseonefortytwo" has been encrypted to: fvhrqhiruwbwzr How many words is your message? 4 Next word: computer "computer" has been encrypted to: frpsxwhu Next word: science "science" has been encrypted to: vflhqfh Next word: is "is" has been encrypted to: lv Next word: awesome "awesome" has been encrypted to: dzhvrph Message fully encrypted. Happy secret messaging!

Computer Networking: A Top-Down Approach (7th Edition)
Computer Networking: A Top-Down Approach (7th Edition)
7th Edition
ISBN:9780133594140
Author:James Kurose, Keith Ross
Publisher:James Kurose, Keith Ross
Chapter1: Computer Networks And The Internet
Section: Chapter Questions
Problem R1RQ: What is the difference between a host and an end system? List several different types of end...
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PLEASE DON'T USE "IF" OR "RETURN" STATEMENTS AND NOOOO "\N","\" VALUES EITHER 

Welcome to the CSE142 Encryption Machine The program lets you encrypt a message with a key for your recipient to decrypt! Encrypted messages use a shared keyword to decrypt. Enter key: cseonefortytwo "cseonefortytwo" has been encrypted to: fvhrqhiruwbwzr How many words is your message? 4 Next word: computer "computer" has been encrypted to: frpsxwhu Next word: science "science" has been encrypted to: vflhqfh Next word: is "is" has been encrypted to: lv Next word: awesome "awesome" has been encrypted to: dzhvrph Message fully encrypted. Happy secret messaging!
Transcribed Image Text:Welcome to the CSE142 Encryption Machine The program lets you encrypt a message with a key for your recipient to decrypt! Encrypted messages use a shared keyword to decrypt. Enter key: cseonefortytwo "cseonefortytwo" has been encrypted to: fvhrqhiruwbwzr How many words is your message? 4 Next word: computer "computer" has been encrypted to: frpsxwhu Next word: science "science" has been encrypted to: vflhqfh Next word: is "is" has been encrypted to: lv Next word: awesome "awesome" has been encrypted to: dzhvrph Message fully encrypted. Happy secret messaging!
As usual, we recommend you approach the program in stages, rather than trying to complete everything at once. Specifically, we suggest implementing functionality in the following order: 1 Single letter: Write a method to encrypt a fixed single letter with a fixed shift of 3. 2 Parametrized letters: Modify your single letter encryption method to be able to encrypt any letter in your alphabet with a shift of three. You'll need to have implemented your ALPHABET constant to do this. 3 Single word: Once your single letter encryption method completely works, write a method that encrypts a single word with a shift of 3 by calling your single letter method. 4 User input: Prompt the user for a key and a message to encrypt and output the encrypted ciphertext. 5 SHIFT constant: modify your program to use a constant to determine the amount to shift characters by. Hints Remember that you can find the index of a specific character within a String with the index0f(char) method You can also find the character at a specific index within a String with the charAt(int) method To allow for characters wrapping around the alphabet, it might be helpful to think of the alphabet as being circular. Use the mod (%) operator to wrap around! If your program is generating InputMismatchException errors, you are likely reading the wrong type of values from your Scanner (for example, using nextInt to read text).
Transcribed Image Text:As usual, we recommend you approach the program in stages, rather than trying to complete everything at once. Specifically, we suggest implementing functionality in the following order: 1 Single letter: Write a method to encrypt a fixed single letter with a fixed shift of 3. 2 Parametrized letters: Modify your single letter encryption method to be able to encrypt any letter in your alphabet with a shift of three. You'll need to have implemented your ALPHABET constant to do this. 3 Single word: Once your single letter encryption method completely works, write a method that encrypts a single word with a shift of 3 by calling your single letter method. 4 User input: Prompt the user for a key and a message to encrypt and output the encrypted ciphertext. 5 SHIFT constant: modify your program to use a constant to determine the amount to shift characters by. Hints Remember that you can find the index of a specific character within a String with the index0f(char) method You can also find the character at a specific index within a String with the charAt(int) method To allow for characters wrapping around the alphabet, it might be helpful to think of the alphabet as being circular. Use the mod (%) operator to wrap around! If your program is generating InputMismatchException errors, you are likely reading the wrong type of values from your Scanner (for example, using nextInt to read text).
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