The Vigenère cipher is a polyalphabetic substitution cipher, meaning it uses multiple substitution alphabets to encrypt the text. It is an improvement over simpler ciphers like the Caesar cipher an…

The Vigenère cipher is a polyalphabetic substitution cipher, meaning it uses multiple substitution alphabets to encrypt the text. It is an improvement over simpler ciphers like the Caesar cipher an…

In Bash, can use the openssl command-line tool to perform AES encryption and decryption. This tool supports various encryption algorithms, including AES, and allows you to encrypt and decrypt files…

AES (Advanced Encryption Standard) is a widely used and secure symmetric encryption algorithm. In Python, you can implement AES encryption and decryption using the pycryptodome library, which provi…

simple implementation of RSA encryption and decryption in a Bash script. Since Bash is not designed for complex mathematical operations, this script uses external tools like bc (a command-line calc…

Python script that demonstrates how to implement RSA encryption and decryption. This script generates public and private keys, encrypts a message using the public key, and decrypts it using the pri…

Creating a Playfair cipher in Bash is more challenging compared to Python due to the lack of advanced string manipulation and data structures in Bash. However, it is possible to implement a simplif…

The Playfair cipher is a digraph substitution cipher that encrypts pairs of letters. To use it, you first create a 5x5 table based on a secret keyword. Below is a Python implementation of the Playf…

The monoalphabetic substitution cipher replaces each letter in the plaintext with a corresponding letter from a substitution key. The key is a permutation of the alphabet, where each letter maps un…

The monoalphabetic substitution cipher is a simple encryption method where each letter in the plaintext is replaced with another letter according to a fixed substitution key. The key is a permutati…

Bash Script for Caesar Cipher Encryption. Below is an example of a Bash script that implements a simple Caesar cipher for encrypting text. The Caesar cipher shifts each letter in the input text by …

Python script that demonstrates a simple encryption method using the Caesar cipher. The Caesar cipher is a basic encryption technique where each letter in the text is shifted by a fixed number of p…

a sample database that is often used for learning and testing

simple systems/measurements

fun with building a network