*** Note: This program's methodology of finding the possible words that fit does not always work on the first try. If you encount a ciphertext where you cannot get substitutions that make sense then ...

This project is a beginner-level Python command-line utility designed to perform encryption and decryption using the Caesar Cipher. It serves as a practical demonstration of fundamental cryptographic ...

Hannah handed me a piece of paper with the following string of letters. “Each letter stands for another one,” said Hannah. “Ooh, a substitution cipher!” I thought. But I was stumped. “Is this just one ...

Cryptography puts the “crypto” in cryptocurrency. It has existed much longer than our digital age and has evolved like languages over the centuries. One of the most famous uses was developed by Julius ...

The concluding words of Unsolved! are a call to action. Craig Bauer, a US mathematician and editor-in-chief of the journal Cryptologia, ends his hefty history of cryptography by noting that even as he ...