Learn how to implement a classic substitution cipher in C! This step-by-step tutorial walks you through encoding and decoding messages by replacing each letter with another according to a fixed key. A ...

You can create a release to package software, along with release notes and links to binary files, for other people to use. Learn more about releases in our docs.

Originally built in 2023 as a learning exercise. Uploaded in 2025 for portfolio visibility. The code reflects the practices and scope from that period. Goal: Implement simple classical ciphers (Caesar ...

You could do worse than to confuse the meanings of "code" and "cipher"—even cryptographers sometime use the terms as though they had the same meaning. There is, however, a definite distinction between ...

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 ...