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Code Examples – En-/Decryption with RSA En-/decryption with RSA: We want to use RSA to encrypt and decrypt a file. RSA is an algorithm for public-key encryption. In contrast to symmetric key cryptography, public key cryptography generally allows users to communicate securely without having prior access to a shared secret key, by using a pair of cryptographic keys, called the public key and private key, which are mathematically related, but it is infeasible to compute the private key from the public key. (Another term for public-key cryptography is asymmetric key cryptography.) The private key is usually kept secret, whereas the public key may be widely distributed. In this example, we will generate such a keypair and encrypt and decrypt a file stored on the local disk with RSA. First, we do the necessary imports. Computer Repair Flyer Templates. 01 import java.io.FileInputStream; 02 import java.io.FileOutputStream; 03 import java. Gharana Mogudu Hd Video Songs on this page. security.KeyPair; 04 import java.security.KeyPairGenerator; 05 import java.security.PrivateKey; 06 import java.security.PublicKey; 07 import java.security.Security; 08 09 import javax.crypto.Cipher; 10 import javax.crypto.CipherInputStream; 11 import javax.crypto.CipherOutputStream; 12 13 import de.flexiprovider.core.FlexiCoreProvider; 14 15 public class ExampleRSA { 16 17 public static void main(String[] args) throws Exception { 18 19 Security.