How can I implement data encryption in Java microservices?

How can I implement data encryption in Java microservices?

You can implement data encryption in Java microservices using libraries like JCE (Java Cryptography Extension) or Bouncy Castle. Would you like a code example?

Yes, please provide a code example for encrypting data.

Here's a simple example using JCE:

import javax.crypto.Cipher;
import javax.crypto.KeyGenerator;
import javax.crypto.SecretKey;
import javax.crypto.spec.SecretKeySpec;

public class EncryptionExample {
    public static void main(String[] args) throws Exception {
        String data = "Sensitive Data";
        KeyGenerator keyGen = KeyGenerator.getInstance("AES");
        keyGen.init(128);
        SecretKey secretKey = keyGen.generateKey();

        Cipher cipher = Cipher.getInstance("AES");
        cipher.init(Cipher.ENCRYPT_MODE, secretKey);
        byte[] encryptedData = cipher.doFinal(data.getBytes());

        System.out.println("Encrypted Data: " + Base64.getEncoder().encodeToString(encryptedData));
    }
}

This code generates a secret key and encrypts the data using AES.

What about decrypting the data?

To decrypt the data, you would use the same secret key and initialize the cipher in decrypt mode. Here's how:

cipher.init(Cipher.DECRYPT_MODE, secretKey);
byte[] decryptedData = cipher.doFinal(encryptedData);
System.out.println("Decrypted Data: " + new String(decryptedData));

Make sure to securely store the secret key!