Python_Implemenation_of_CryptoSystem_from_Scratch

This directory contains scratch implementation of various Crypto systems:

The only libraries used :

------------------------numpy : for array conversion and easy of using matrix multiplication

------------------------random : random number generation when required

                               (except in RC4 , we used our own implementation of Psuedo random number generator)

------------------------matplotlib : for image visualization in visual cryptography

------------------------openCV2 : for reading and writing images for visual cryptography

These files present in the directory are ipynb files (ipython notebook,use google colab or jupyter notebook to open) :

1. 2_2SecretSharingScheme.ipynb : Scratch implementation of 2,2 shamir secret sharing scheme
2. Ceaser's Cipher.ipynb : Scratch implementation of Ceaser's Cipher
3. RC4.ipynb : Scratch implementation of RC4 crypto system
4. RSA.ipynb : Scratch implementation of RSA crypto system
5. Sample.jpg : A sample images used in visual cryptography
6. ScytaleCipher.ipynb : Scratch implementation of Scytale Cipher
7. TWSecretSharingAndVisualcrypto.ipynb : Scratch implementation of T,W secret sharing scheme and Visual cryptography

Note: while running these notebooks various text files and images are generated and saved in the current directory