🔐 Information Security Codes

Welcome to the Information Security Codes repository! This collection contains implementations of foundational cryptographic algorithms, focusing on Diffie-Hellman Key Exchange, RSA Encryption/Decryption, and the Vigenère Cipher. These algorithms are crucial for securing data and ensuring privacy in communication.

💻 Project Overview

1. Diffie-Hellman Key Exchange 🔑

• A method for securely exchanging cryptographic keys over a public channel.
• Ensures secure communication between parties without prior knowledge of each other’s keys.

2. RSA Encryption/Decryption 🔒

• An asymmetric encryption algorithm that uses a pair of keys (public and private) to encrypt and decrypt messages.
• Commonly used for secure data transmission in web communications, such as HTTPS.

3. Vigenère Cipher 📜

• A classical cipher that uses a keyword to encrypt alphabetic text, providing basic data obfuscation.
• A polyalphabetic cipher that can encrypt messages using various shifts based on the letters of a keyword.

🛠️ Tech Stack

• Languages: Python, Java
• Tools/Libraries:
  • Java: javax.crypto, java.security for RSA
  • Python: Standard libraries for Diffie-Hellman and Vigenère Cipher

📚 Concepts Covered

• Key Exchange Protocol: Securely exchange cryptographic keys using Diffie-Hellman.
• Asymmetric Encryption: RSA encryption/decryption with public and private keys.
• Classical Encryption: Encrypt alphabetic text with the Vigenère Cipher.

🛡️ Use Cases

These algorithms are used in:

• Secure communication: Protect data during transmission over insecure networks.
• Public key infrastructure (PKI): Ensure authentication and confidentiality using RSA.
• Basic encryption: Obfuscate text with classical ciphers like Vigenère.

🏆 Contributions

Any improvements or suggestions are most welcome!