Date Added: Nov 2013
In cryptography, there are two different types of methods to provide the security to a data. They are symmetric & asymmetric. Symmetric means same key for sender as well as receiver. Generally, cryptography concepts having three important blocks, they are encryption, key generation & decryption. Data transmission can be starts from sender who can only able to mix the original data with key which is called as \"Cipher text\". Cipher text transmission process can be done through the network medium. Finally, cipher text can be received by receiver who knows the methodology done by the sender.