Hi Friend,

Try the following code:

import java.io.*;
import java.security.*;
import javax.crypto.*;

class EncryptAndDecrypt {

public static void main (String[] args) throws Exception{
KeyPairGenerator keygenerator = KeyPairGenerator.getInstance("RSA");
SecureRandom random = SecureRandom.getInstance("SHA1PRNG", "SUN");
keygenerator.initialize(1024, random);

KeyPair keypair = keygenerator.generateKeyPair();
PrivateKey privateKey = keypair.getPrivate();
PublicKey publicKey = keypair.getPublic();
Cipher cipher = Cipher.getInstance("RSA");

cipher.init(Cipher.ENCRYPT_MODE, publicKey);
String st= "roseindia";
byte[] cleartext = null;
cleartext = st.getBytes();
byte[] ciphertext = null;
ciphertext = cipher.doFinal(cleartext);
System.out.println("the encrypted text is: " + ciphertext.toString());

cipher.init(Cipher.DECRYPT_MODE, privateKey);
byte[] cleartext1 = cipher.doFinal(ciphertext);
System.out.println("the decrypted cleartext is: " + new String(cleartext1));
}
}

Thanks

I have a question, I used this code to encrypt a string and store it in my database, and it was successful, but when I tried to extract the data from the database, by using a resultset, rs.getString, of course it retrieved the encrypted data, when I try to put it in a String which is in this case the "String st", it repeats the process of encrypting it. Is there anyway to use this code but just the decryption part???..

http://www.roseindia.net/answers/viewqa/Java-Beginners/26017-Java-Encryption-using-AES-with-key-password-.html

http://www.roseindia.net/answers/viewqa/Java-Beginners/26020-AES-Decryption-using-key-password-.html