Assignment 1 Submisstion Guidelines

Please provide just enough information to verify correctness.  If you used
or found an additional resource useful for the deciphering, then indicate 
this under COMMENTS (not for marking consideration).  

One to two block lengths of plaintext, up to one line should be sufficient.

Under COMMENTS you may also make any relevant remarks regarding the method 
or calculation you used, comments on the results, or observations regarding 
the exercise.

Submissions will be accepted by e-mail (to kohel@maths.usyd.edu.au), or 
hardcopy under my office door (625).

N.B. Small bits of code can be included under COMMENTS, otherwise if you want 
me to consider longer code submissions, then provide this in a separate message 
or attachment. 

Q1

Vigenere key 
  Enciphering: 
  Deciphering:
Plaintext 
  Initial characters:

COMMENTS


Q2

Substitution key
  Enciphering: 
  Deciphering:
Plaintext 
  Initial characters:

COMMENTS


Q3

Entropies
  Plaintext entropy:
  Keyspace entropy:
  Ciphertext entropy:
  Cryptosystem entropy:

COMMENTS


Q4

Transposition key
  Enciphering: 
  Deciphering:
Substitution key
  Enciphering: 
  Deciphering:

Initial plaintext

COMMENTS