Add Railfence and Route decoders, tests and helper scripts #824
Conversation
This file contains hidden or bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
Sign up for free
to join this conversation on GitHub.
Already have an account?
Sign in to comment
1 participant
Add this suggestion to a batch that can be applied as a single commit.
This suggestion is invalid because no changes were made to the code.
Suggestions cannot be applied while the pull request is closed.
Suggestions cannot be applied while viewing a subset of changes.
Only one suggestion per line can be applied in a batch.
Add this suggestion to a batch that can be applied as a single commit.
Applying suggestions on deleted lines is not supported.
You must change the existing code in this line in order to create a valid suggestion.
Outdated suggestions cannot be applied.
This suggestion has been applied or marked resolved.
Suggestions cannot be applied from pending reviews.
Suggestions cannot be applied on multi-line comments.
Suggestions cannot be applied while the pull request is queued to merge.
Suggestion cannot be applied right now. Please check back later.
Summary
This PR adds two new classical transposition decoders to ciphey/basemods/Decoders:
RailfenceDecoder
RouteCipherDecoder
Both decoders follow the existing Ciphey Decoder interface and integrate cleanly with the current decoding pipeline.
What’s Included
New decoder modules: railfence.py and routecipher.py
Decoder registration via ciphey/basemods/Decoders/init.py
Basic test cases for both decoders
Helper scripts used during verification
Motivation
Ciphey currently supports many substitution ciphers but lacks several classical transposition ciphers.
This PR extends Ciphey’s coverage and allows automated decoding of two widely taught transposition techniques.
Notes
Both decoders work with the existing Ciphey version (no updates to cipheycore or cipheydists needed).
Implementation is fully deterministic and compatible with existing workflows.