Abstract : Data is encrypted with a key that can be a random string of bits, or some word or phrase that you pick. The key is like a password. It needs the same degree of secrecy and the same care in creating a word or phrase that cannot be guessed. The key is used by the encryption algorithm to scramble your data and to unscramble it on the other side. The project is for implementing the stream cipher since stream ciphers are more suitable for hardware implementation and real-time systems where bits of data are received serially.