Rot13

As explained in Natural Language Processing in Action, Second Edition

A Caesar cipher is a substitution cipher that shifts each letter by a fixed position in an ordered alphabet.

How Natural Language Processing in Action, Second Edition covers it

How deep it goes

Demonstrates the cipher’s intuition, frequency-based shift discovery, character-level implementation, and library-based decoding.

Examples

Uses the encoded Zen of Python, character-count tables, frequency histograms, and Python decoding commands.

What you can do after

Apply it via Python’s codecs package to decode ROT13 messages.

How it connects

Connects Caesar cipher, character frequency, ord(), chr(), and Python codecs.

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Also explained in

• 

  liveBookmanning.com
  Functional Programming in JavaScriptA simple substitution cipher that rotates alphabetic characters by 13 positions.
• 

  liveBookmanning.com
  Learn Haskell by ExampleROT13 is a Caesar cipher that rotates letters by 13 positions in the basic Latin alphabet, making the same transformation serve as encryption and decryption.

Compare how 3 books explain rot13 →

Related concepts

• Caesar cipherkind of · A Caesar cipher is a substitution cipher that shifts each alphabetic letter by a fixed number of positions with wrap-around.
• encryptionuses · Encryption is the cryptographic transformation of readable data into ciphertext to conceal its contents, reversible through decryption with appropriate information.
• property-based testingused by · Property-based testing is a software-testing technique that generates varied inputs and checks whether specified general properties of the software’s behavior hold across them.

This explainer was generated by Manning's knowledge graph from the text of Natural Language Processing in Action, Second Edition. The section links point to the parts of the book it draws on.