Library consisting of explanation and implementation of all the existing attacks on various Encryption Systems, Digital Signatures, Hashing Algorithms along with example challenges from CTFs.

Crypton is an educational library to learn and practice Offensive and Defensive Cryptography. It is basically a collection of explanation and implementation of all the existing vulnerabilities and attacks on various Encryption Systems (Symmetric and Asymmetric), Digital Signatures, Message Authentication Codes and Authenticated Encryption Systems.

Each attack is also supplemented with example challenges from "Capture The Flag" contests and their respective write-ups. Individuals who are already acquainted (or are into CTFs) with this field can use Crypton as a tool to solve challenges based on a particular existing vulnerability.

The library will be continuously updated with attack explanations and CTF challenges! Feel free to email me regarding any suggestions!

WARNING: The author in no way guarantees that the code is secure. The library is only meant for educational purposes and the code should not be used for implementing in real world. All the example scripts in the library are trivial implementations.

There are different sections in this README:

  • Motivation- What motivated me to create this library
  • Library Structure- Directory structure of Crypton
  • Domain Coverage- What all cryptosystems and attacks are covered in this library
  • Future Plans/TODO- Attacks/concepts that are to be included soon


Help CTF players and individuals interested in the field of Cryptography provide a platform for learning attacks in crypto and for experienced CTF players to practice challenges systematically divided into attacks associated with different sub-domains in crypto. Also, illustrate through various attack explanations how proper implementation of protocols is crucial.

Library Structure