Merge pull request #256 from djv554/main

Added an encryption and decryption app

Beginner_Projects/Number Guessing Game/README.md

@@ -1,4 +1,4 @@
-## **Password Generator**
+## **Number Guessing Game**
 
 ### 🎯 **Goal**
 
@@ -41,4 +41,4 @@ N/A.
 In conclusion, this Number Guessing Game project demonstrates fundamental programming concepts such as random number generation, user input handling, loops, and error handling in Python. It provides an engaging, interactive experience where users can repeatedly guess until they find the correct number, offering immediate feedback. The code is simple yet effective, making it a great learning project for beginner developers looking to strengthen their understanding of basic programming logic.
 
 **Deanne Vaz**  
-[GitHub](https://github.com/djv554) | | [LinkedIn](https://www.linkedin.com/in/deanne-vaz/)
+[GitHub](https://github.com/djv554) | | [LinkedIn](https://www.linkedin.com/in/deanne-vaz/)

Beginner_Projects/Web Scraper/README.md

@@ -1,4 +1,4 @@
-## **Password Generator**
+## **Web Scraper**
 
 ### 🎯 **Goal**
 

Cybersecurity_Tools/Encryption_Decryption app/README.md

@@ -0,0 +1,42 @@
+## **Encryption Decryption App**
+
+### 🎯 **Goal**
+
+The goal of this project is to create a simple encryption and decryption app using Streamlit. 
+
+### 🧵 **Dataset**
+
+N/A
+
+### 🧾 **Description**
+
+This project is a simple web application built using Streamlit, designed to demonstrate basic encryption and decryption techniques using two well-known algorithms: Caesar Cipher and Vigenère Cipher.
+
+### 🧮 **What I had done!**
+
+1. Built a simple, user-friendly Streamlit interface for users to encrypt and decrypt their messages using basic algorithms like Caesar Cipher and Vigenère Cipher.
+2. Set up input fields for users to enter messages, select encryption methods, and perform actions (encrypt or decrypt) via buttons and dropdown menus.
+
+
+### 🚀 **Models Implemented**
+
+N/A
+
+### 📚 **Libraries Needed**
+
+1. `Streamlit` - For building the user interface.
+
+### 📊 **Exploratory Data Analysis Results**
+
+N/A. 
+
+### 📈 **Performance of the Models based on the Accuracy Scores**
+
+N/A. 
+
+### 📢 **Conclusion**
+
+The Basic Encryption and Decryption App serves as an effective introduction to fundamental cryptographic techniques, showcasing the implementation of the Caesar Cipher and Vigenère Cipher. By leveraging Streamlit, the project provides a user-friendly interface that simplifies the process of encrypting and decrypting messages.
+
+**Deanne Vaz**  
+[GitHub](https://github.com/djv554) | | [LinkedIn](https://www.linkedin.com/in/deanne-vaz/)

Cybersecurity_Tools/Encryption_Decryption app/encrypt_decrypt.py

@@ -0,0 +1,72 @@
+import streamlit as st
+
+# Function to encrypt using Caesar Cipher
+def caesar_encrypt(plaintext, shift):
+    encrypted = ""
+    for char in plaintext:
+        if char.isalpha():
+            shift_amount = shift % 26
+            ascii_offset = ord('A') if char.isupper() else ord('a')
+            encrypted += chr((ord(char) + shift_amount - ascii_offset) % 26 + ascii_offset)
+        else:
+            encrypted += char
+    return encrypted
+
+# Function to decrypt using Caesar Cipher
+def caesar_decrypt(ciphertext, shift):
+    return caesar_encrypt(ciphertext, -shift)
+
+# Function to encrypt using Vigenère Cipher
+def vignere_encrypt(plaintext, key):
+    encrypted = ""
+    key_length = len(key)
+    for i, char in enumerate(plaintext):
+        if char.isalpha():
+            shift = ord(key[i % key_length].upper()) - ord('A')
+            ascii_offset = ord('A') if char.isupper() else ord('a')
+            encrypted += chr((ord(char) + shift - ascii_offset) % 26 + ascii_offset)
+        else:
+            encrypted += char
+    return encrypted
+
+# Function to decrypt using Vigenère Cipher
+def vignere_decrypt(ciphertext, key):
+    decrypted = ""
+    key_length = len(key)
+    for i, char in enumerate(ciphertext):
+        if char.isalpha():
+            shift = ord(key[i % key_length].upper()) - ord('A')
+            ascii_offset = ord('A') if char.isupper() else ord('a')
+            decrypted += chr((ord(char) - shift - ascii_offset) % 26 + ascii_offset)
+        else:
+            decrypted += char
+    return decrypted
+
+# Streamlit app layout
+st.title("Basic Encryption and Decryption App")
+
+message = st.text_area("Enter your message:")
+method = st.selectbox("Select encryption/decryption method:", ["Caesar Cipher", "Vigenère Cipher"])
+action = st.selectbox("Select action:", ["Encrypt", "Decrypt"])
+
+if method == "Caesar Cipher":
+    shift = st.number_input("Enter shift value:", min_value=1, value=3)
+
+    if st.button("Submit"):
+        if action == "Encrypt":
+            result = caesar_encrypt(message, shift)
+            st.success(f"Encrypted Message: {result}")
+        else:
+            result = caesar_decrypt(message, shift)
+            st.success(f"Decrypted Message: {result}")
+
+else:  # Vigenère Cipher
+    key = st.text_input("Enter key:")
+
+    if st.button("Submit"):
+        if action == "Encrypt":
+            result = vignere_encrypt(message, key)
+            st.success(f"Encrypted Message: {result}")
+        else:
+            result = vignere_decrypt(message, key)
+            st.success(f"Decrypted Message: {result}")