Confederate Cipher Disc

Coding Vigenere

by: burt rosenberg
at: university of miami
date: aug 2021

NAME
    vigenere.py
    
SYNOPSIS
    vignere.py [-dv] key
  
DESCRIPTION
    vignere.py encrypts or decrypts stdin to stdout using a viginere cipher and the given
    key. The key is alphabetic, lowercase, with "a" representing 0 shift, and "z" a 
    shift of 25. When decrypting, "z" is be a shift of -25. Any non-alphabetic characters
    in stdin are discarded, and lower and upper case letters are considered identical.
    
    Output ciphertext as capital letters, and plaintext as little letters. Use a traditional
    grouping of 5 letters pair group separated by one space, and 5 groups per line. See
    the shiftcipher program for an example.

OPTIONS 
    -d decrypt
    -v verbose

Goals

• subversion:
  • OSX: Install brew and install subversion.
  • WIN: Install WSL, then install ubuntu from the Windows Store, and then install subversion.
• Make
  • similar instructions and install either the full build-essential, or just make
• Python
  • All: Install Anaconda Individual Edition to get all packages.
  • At the terminal, run conda activate to set up the paths to the base environment of anaconda.

Accept the invitation to the assignment, then clone the created repository to your desktop.

The modify the vigenere.py program so that it runs the tests in the Makefile without error.

When done, push your work back to the repository. Remember, this means you must git add, git commit and then git push.

The Cipher

This work is licensed under a Creative Commons Attribution-ShareAlike 3.0 Unported License.

author: burton rosenberg
created: 21 jan 2018
update: 24 aug 2023