Notifications You must be signed in to change notification settings The Caesar cipher is one of the earliest known and simplest ciphers. It is a type of substitution cipher in which each letter in the ...

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 ...

Hill cipher cryptosystem is a linear algebra‐based classical polygraphic substitution cipher‐based technique. If the encryption key matrix (also called the key matrix) is not invertible, obtaining the ...

Ars' own Julian Sanchez has deciphered a code embedded into the TV show Fringe. Bad Robot, the production company that created the Fox TV show, has been integrating puzzles and easter eggs into shows ...

Abstract: All ciphers are a form of the substitution cipher. Variations of ciphers, such as the P cipher, block ciphers, and product ciphers have been introduced in an effort to hide the patterns that ...

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 ...

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 ...