How do you encrypt and decrypt data in Java?

Table of Contents

• Introduction
• Encrypting and Decrypting Data in Java
  • 1. Symmetric Encryption with AES
    • Example: AES Encryption and Decryption
  • 2. Asymmetric Encryption with RSA
    • Example: RSA Encryption and Decryption
• Conclusion

Introduction

Encrypting and decrypting data is crucial for securing sensitive information in Java applications. The Java Cryptography Architecture (JCA) provides a framework for implementing encryption algorithms. This article explains how to encrypt and decrypt data using symmetric encryption with the Advanced Encryption Standard (AES) and asymmetric encryption with RSA.

Encrypting and Decrypting Data in Java

1. Symmetric Encryption with AES

AES is a widely used symmetric encryption algorithm that uses the same key for both encryption and decryption.

Example: AES Encryption and Decryption

Dependencies: Make sure to import the required packages.

Encrypting Data:

Decrypting Data:

Example Usage:

2. Asymmetric Encryption with RSA

RSA is an asymmetric encryption algorithm that uses a pair of keys: a public key for encryption and a private key for decryption.

Example: RSA Encryption and Decryption

Dependencies: Ensure to import the required packages.

Generating RSA Keys:

Encrypting Data:

Decrypting Data:

Example Usage:

Conclusion

Encrypting and decrypting data in Java can be achieved through the Java Cryptography Architecture (JCA) using both symmetric and asymmetric algorithms like AES and RSA. By following the examples provided, developers can implement secure data handling in their applications, ensuring the confidentiality and integrity of sensitive information. Understanding these cryptographic techniques is essential for building secure applications in today's digital landscape.