Encryption consists of substitution and permutation method.
In this video, we will see the substitution method alone in an image.
Here, I am using the function explained in the previous video for generating the keys. Please visit the link below for the key generation function
[ Ссылка ]
For theoretical concepts of permutation and substitution, please visit the link given below
[ Ссылка ]
![](https://s2.save4k.ru/pic/3UwD0KJr7_g/maxresdefault.jpg)