Cryptography

Topic Classification: nid, "Topic Classification"); ?> Tags: nid, "Problem Tag");?>
Grade Vs Difficulty:
  EasyModerateChallengingPerplexing
1-2
 
3-4
 
5-6
 
7-8
 
 
9-10
 
11-12
 
13-14
 

This is a collection of coded jokes starting with simple shift ciphers up to some frequency analysis. Students of many ages can work on it without much help.