# A Caesar cipher shifts each letter by a fixed number of positions in the alphabet. # Used by Julius Caesar to send secret messages. Shift by 3: A→D, B→E, Z→C. # NEW CONCEPTS: ord() and chr() # Every ...
This repository is intentionally limited to safe, educational use. Use it only on text you own or are explicitly authorized to analyze. It focuses on classical cryptography history and ...
Introduction If you need to send a secret message to a friend, how could you prevent other people from reading it? One way is to encrypt the message—that is, use a secret code that only you and your ...
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