International Journals of Advanced Information Science and Technology (IJAIST)
Encryption is the process of transforming information (plaintext) using an algorithm (called cipher) to make it unreadable to anyone except those possessing special knowledge, usually referred to as a key. A stream cipher is a fast symmetric key algorithm which is used to convert plaintext to ciphertext. Encryption of images can be done in both spatial and transform domain. A partial image encryption scheme based on DWT and chaotic stream ciphers already exists. Here, a full image encryption scheme based on DWT and stream ciphers is proposed.