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 ...

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 ...

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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 ...

Abstract: The need of appropriate cryptographic solution into the embedded applications is one of the major concerns of IoT developers. The small devices used in this application have low computation ...