Test

Solvers

AZDecrypt's main window has a list of solvers. Each one is a type of hillclimber that specializes in different types of ciphers:

• Substitution
  • Simple substitution ciphers (including homophonic substitution)
• Substitution + columnar rearrangement
  • A combination of simple substitution and moving columns around.
• Substitution + columnar transposition
  • A combination of simple substitution and columnar transposition.
• Substitution + crib grid
  • This solver displays a grid that is the same shape as the input cipher. You can enter your guesses for portions of the plaintext. Then, the solver will search for the rest of the plaintext but maintain the plaintext entries you've made.
• Substitution + crib list
• Substitution + monoalphabetic groups
• Substitution + nulls and skips
  • Tries to figure out if certain symbols in a substitution cipher don't actually contribute towards the plaintext.
  • A "null" is a position in the cipher text that does not translate to plaintext (and is ignored during decryption). The solver will consider different positions to be nulls, and exclude them prior to the next steps of decryption.
  • A "skip" is a missing symbol that is inserted at some position in the cipher. The solver will put them in different positions of the ciphertext before proceeding to the next steps of decryption.
  • More info
• Substitution + polyphones
• Substitution + row bound
• Substitution + row bound fragments
• Substitution + sequential homophones
• Substitution + simple transposition
• Substitution + sparse polyalphabetism
• Substitution + units
  • Jarl's note on using this solver on nomenclator type ciphers:
    • After launching the solver a menu will pop up. You can set the Unit as Symbol or Horizontal sequence, the Mode to Replace with new symbols. If selected Horizontal sequence set the Horizontal sequence to 1. The Key length start determines the amount of Symbols or Horizontal sequences to be replaced. And set Replace, # of symbols per instance to 2 if you want to replace symbols with bigrams for example.
• Substitution + vigenere
• Substitution + vigenere word list
• Bigram substitution
• Higher-order homophonic
• Merge sequential homophones
• Non-substitution
  • Scores your plain text and provides detailed n-gram stats
• Columnar transposition (keyed)
• Columnar rearrangement (keyed)
  • Demonstration
• Grid rearrangement (keyed)
• Periodic transposition
  • Can solve a whole variety of transposition ciphers keyed or unkeyed as long as the transposition can be summarized by a limited set of periodic rules
• Simple transposition
  • The same solver as the Substitution + simple transposition but does not perform substitution