How do you use Cipher with a simple code example?

The Java Cipher class provides the functionality of a cryptographic cipher for data encryption and decryption. It's a part of the Java Cryptography Architecture (JCA) and allows you to perform block and stream encryption using various algorithms such as AES, DES, etc.

Java Cipher Example

Below is a simple example of how to use the Cipher class to encrypt and decrypt data using AES algorithm:


    import javax.crypto.Cipher;
    import javax.crypto.KeyGenerator;
    import javax.crypto.SecretKey;
    
    public class CipherExample {
        public static void main(String[] args) throws Exception {
            // Generate a key
            KeyGenerator keyGen = KeyGenerator.getInstance("AES");
            keyGen.init(128); // for AES-128
            SecretKey secretKey = keyGen.generateKey();
    
            // Create Cipher instance
            Cipher cipher = Cipher.getInstance("AES");
    
            // Encrypt
            cipher.init(Cipher.ENCRYPT_MODE, secretKey);
            String originalText = "Hello, World!";
            byte[] encryptedBytes = cipher.doFinal(originalText.getBytes());
    
            // Decrypt
            cipher.init(Cipher.DECRYPT_MODE, secretKey);
            byte[] decryptedBytes = cipher.doFinal(encryptedBytes);
            String decryptedText = new String(decryptedBytes);
    
            System.out.println("Original: " + originalText);
            System.out.println("Decrypted: " + decryptedText);
        }
    }

How do you use Cipher with a simple code example?

Java Cipher Example

Popular Topics

Recent Languages

How do you use Cipher with a simple code example?

Java Cipher Example

Related Questions

Popular Topics

Recent Languages