DES Encryption & Decryption in Java

This project demonstrates how to perform symmetric encryption and decryption using the DES (Data Encryption Standard) algorithm in Java. It includes a simple implementation that encrypts a string using a DES key and then decrypts it back to its original form.

🔐 About DES

DES is a symmetric-key block cipher developed in the 1970s. It encrypts data in 64-bit blocks using a 56-bit key. While considered insecure for modern applications, it remains important in learning cryptographic fundamentals.

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📁 File Included

• Encrypt_Decrypt_DES.java
  Contains both encryption and decryption logic using javax.crypto libraries.

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🛠️ How It Works

1. A plaintext string is converted to bytes.
2. A DES key is generated (or hardcoded).
3. The plaintext is encrypted using DES.
4. The ciphertext is decrypted back to plaintext.

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▶️ How to Run

javac Encrypt_Decrypt_DES.java
java Encrypt_Decrypt_DES
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