Symmetric and Asymmetric Key Encryption using Keytool

Both Symmetric and Asymmetric key method can be used to secure message. First the message is encrypted with a symmetric key and then before sending the key to other party the key itself is encrypted with other parties public key. The other party on receiving the encrypted message and encrypted key, first decrypts the key with private key and than decrypts the message by using the decrypted key. To know more about Java security read http://www.java-redefined.com/2013/08/java-security.html