blackghost56 / freq_analysis Goto Github PK

The program allows you to study the simple frequency analysis used in cryptography to crack the most simple ciphers. This is console application

Works in compilers:

• gcc-4.8
• MSVS2015

Work algorithm:

1. File coding. If there is already an encoded file, you can skip this step. Note. Implemented simple coding method with linear cyclic shift by a specified value.
2. Analysis of the text (large) to create a frequency dictionary (getting a "true statistic vector").
3. Analysis of the cipher text to create a frequency dictionary (getting a "false statistic vector").
4. Using the tool to automatically replace characters, based on the previously obtained vectors.

Note. For more information use the key: --help

Project structure:

• Example coding and decoding text: \example
• Source: \src
• Compiled code:
  • Window 7/8/10: \x86_x64
  • Ubuntu 14/16: \linux