Caesar cipher
A Caesar cipher is a substitution cipher that shifts each alphabetic letter by a fixed number of positions with wrap-around.
Julia as a Second Language
A Caesar cipher is a substitution cipher that shifts each alphabetic letter by a fixed number of positions with wrap-around.
- How it is used
- Serves as an interchangeable encryption algorithm in a password-keeping example that contrasts object-oriented and functional designs.
- How deep it goes
- Works through uppercase character encryption, modulo wrap-around, decryption, whole-message mapping, and two service integrations.
- Examples
- Uses a full-sentence encryption round trip, a `HELLO` pipeline, and password-vault storage and retrieval.
- What you can do after
- Build it from scratch in Julia and plug it into either an interface-based or function-based password keeper.
Read how Julia as a Second Language explains Caesar cipher →
Learn Haskell by Example
A Caesar cipher is a substitution cipher that replaces each letter with another letter a fixed distance away in an ordered alphabet.
- How it is used
- Teaches functional programming through a practical string-transformation and encryption exercise.
- How deep it goes
- Works from alphabet rotation through character helpers, recursion, map, symmetry, and frequency analysis, while stopping short of secure cryptography.
- Examples
- Uses substitution wheels, ROT13 messages, digit rotations, GHCi evaluations, and frequency-analysis exercises.
- What you can do after
- Build a Caesar cipher in Haskell, test reversible rotations, and investigate weak encryption with frequency counts.
Related concepts
- rot13includes · ROT13 is a substitution cipher that rotates each letter of the Latin alphabet thirteen positions, making encryption and decryption identical.
- cipherkind of · A cipher is a cryptographic algorithm that transforms plaintext into ciphertext and typically provides a corresponding transformation for recovering the original plaintext.
- mapused by · An operation that applies a function to values in a collection or computational context, producing corresponding results while preserving the collection or context’s structure.
- cryptographic keyconfigured by · A cryptographic key is a value supplied to a cryptographic algorithm to control operations such as encryption, decryption, signing, authentication, or verification.
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