Ciphers

Playing around with Caesar Ciphers. User will input a message that they wish to encrypt when prompted.

Once a message is inputted, users will have the choice to choose an encryption key (positive or negative integer) using either "y", "Y", or "n", "N".

If users input "y"/"Y": They will be prompted to choose a key (positive or negative integer).

If users input "n"/"N": The default encryption key will be used.

Python Cipher

• Uses the Ascii chart (not limited to only letters)
• Uses STDIN to get user input

• This program will also decrypt the encrypted text.

Java Cipher

• Uses the Ascii chart (not limited to only letters)
• Uses STDIN to get user input:

• 1st input is the message to encrypt
• 2nd input is y or n
• If y is chosen, supply a positive integer for the 3rd argument, otherwise there is no 3rd argument
• This program will also decrypt the encrypted text.

C/C++ Cipher

• To compile, run make
• Uses the Ascii chart (not limited to only letters)
• Uses command line arguments:

• 1st is the program name
• 2nd is "y" or "n" (case insensitive) to indicate if the user would like to choose the key
• If the user chooses "y": the third argument must be an integer (only positive integers work. Negative integers will result in the key being 0, hence there will be no shifting)
• If the user chooses "n": No third argument is needed

• After the user runs the program with command line arguments, they will be prompted to enter a message they would like to encrypt.

• If no message is inputted, program ends.
• If message is provided, Users will be shown the original message, the key, and the encrypted message.
• This program will also decrypt the encrypted text.

Javascript Cipher

• Uses the Ascii chart (not limited to only letters)
• Use a javascript compiler (online) if you want to run it.
• function is called "cipher" and it takes in 2 parameters: a message and a key
• Enter the message in the html script when the javascript method is called and enter a key.