Prompts For Coders

The RSA algorithm is a widely used public key cryptography algorithm for encrypting and decrypting data. Here's an example of how you can write a Java program to encrypt and decrypt data using the RSA algorithm: import java.security.*; import javax.crypto.Cipher; public class RSAEncryptionExample { public static void main(String[] args) throws Exception { String plainText = "Hello, RSA Encryption!"; KeyPair keyPair = generateKeyPair(); byte[] encryptedData = encrypt(plainText, keyPair.getPublic()); System.out.println("Encrypted Data: " + bytesToHex(encryptedData)); String decryptedText = decrypt(encryptedData, keyPair.getPrivate()); System.out.println("Decrypted Text: " + decryptedText); } public static KeyPair generateKeyPair() throws Exception { KeyPairGenerator keyGen = KeyPairGenerator.getInstance("RSA"); keyGen.initialize(2048); // You can choose different key sizes return keyGen.generateKeyPair(); } public static byte[] encrypt(String data, PublicKey publicKey) throws Exception { Cipher cipher = Cipher.getInstance("RSA"); cipher.init(Cipher.ENCRYPT_MODE, publicKey); return cipher.doFinal(data.getBytes()); } public static String decrypt(byte[] encryptedData, PrivateKey privateKey) throws Exception { Cipher cipher = Cipher.getInstance("RSA"); cipher.init(Cipher.DECRYPT_MODE, privateKey); byte[] decryptedBytes = cipher.doFinal(encryptedData); return new String(decryptedBytes); } public static String bytesToHex(byte[] bytes) { StringBuilder result = new StringBuilder(); for (byte b : bytes) { result.append(String.format("%02X", b)); } return result.toString(); } }