How can I use Bouncy Castle for encryption in Java?

How can I use Bouncy Castle for encryption in Java?

You can use Bouncy Castle by adding it as a dependency in your project and then using its APIs for encryption.

What are the steps to add Bouncy Castle to my Maven project?

You need to add the Bouncy Castle dependency in your pom.xml file. Here's an example:

<dependency>
    <groupId>org.bouncycastle</groupId>
    <artifactId>bcpkix-jdk15on</artifactId>
    <version>1.70</version>
</dependency>

Can you show me a simple example of encrypting a string?

Sure! Here's a simple example:

import org.bouncycastle.jce.provider.BouncyCastleProvider;
import javax.crypto.Cipher;
import javax.crypto.KeyGenerator;
import javax.crypto.SecretKey;
import java.security.Security;

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

        Cipher cipher = Cipher.getInstance("AES/ECB/PKCS5Padding");
        cipher.init(Cipher.ENCRYPT_MODE, secretKey);
        byte[] encrypted = cipher.doFinal("Hello World".getBytes());
        System.out.println("Encrypted: " + Base64.getEncoder().encodeToString(encrypted));
    }
}

What should I do if I encounter an error during encryption?

Check if you have the correct Bouncy Castle version and ensure that your Java environment is properly set up. Also, review the error message for specific issues.