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Blowfish

The document is a Java program that demonstrates encryption and decryption using the Blowfish algorithm. It includes methods to encrypt a string with a specified key and to decrypt the encrypted data back to its original form. The main method showcases the functionality by encrypting and then decrypting a sample message.

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9 views1 page

Blowfish

The document is a Java program that demonstrates encryption and decryption using the Blowfish algorithm. It includes methods to encrypt a string with a specified key and to decrypt the encrypted data back to its original form. The main method showcases the functionality by encrypting and then decrypting a sample message.

Uploaded by

22641a0303
Copyright
© © All Rights Reserved
We take content rights seriously. If you suspect this is your content, claim it here.
Available Formats
Download as TXT, PDF, TXT or read online on Scribd
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import javax.crypto.

Cipher;
import javax.crypto.spec.SecretKeySpec;

public class Main {

private static final String ALGORITHM = "Blowfish";

public static byte[] encrypt(String key, String data) throws Exception {


SecretKeySpec secretKeySpec = new SecretKeySpec(key.getBytes(), ALGORITHM);
Cipher cipher = Cipher.getInstance(ALGORITHM);
cipher.init(Cipher.ENCRYPT_MODE, secretKeySpec);
return cipher.doFinal(data.getBytes());
}

public static String decrypt(String key, byte[] encryptedData) throws Exception


{
SecretKeySpec secretKeySpec = new SecretKeySpec(key.getBytes(), ALGORITHM);
Cipher cipher = Cipher.getInstance(ALGORITHM);
cipher.init(Cipher.DECRYPT_MODE, secretKeySpec);
byte[] decryptedData = cipher.doFinal(encryptedData);
return new String(decryptedData);
}

public static void main(String[] args) {


try {
String key = "Javacodegeeks";
String data = "Hello, world!";

// Encrypt data
byte[] encryptedData =Main.encrypt(key, data);
System.out.println("Encrypted data: " + new String(encryptedData));

// Decrypt data
String decryptedData = Main.decrypt(key, encryptedData);
System.out.println("Decrypted data: " + decryptedData);
} catch (Exception e) {
}
}
}

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