This repository contains implementation of substitution cipher solver based on reasearch paper by Edwin Olson.

Research Paper:

Robust Dictionary Attack of Short Simple Substitution Ciphers - https://www.tandfonline.com/doi/pdf/10.1080/01611190701272369

Removing Ungrammtical Solutions:

I have used python wrapper of language tool to remove ungrammtical sentences generated using algorithm mentioned in above paper. Python wrapper of language tool : https://github.com/myint/language-check

Ranking multiple solutions:

I have used stanford parser to rank multiple grammatically correct sentences. Stanford parser - https://nlp.stanford.edu/software/lex-parser.shtml