Symmetric text encryption scheme based Karhunen Loeve transform

Abstract Recently cryptography is one of the essence areas of study. There are two types of cryptography, this paper is concerned with the simplest and fastest which is “Symmetric Key Cryptography”. Symmetric encryption text information is widely known as an effective and secure method for the purpose of secure transmission. In this paper, we present a new symmetric encryption scheme for text encryption and decryption based on Karhunen Loeve transform, where Karhunen Loeve transform is a reversible linear transform. The time complexity of the proposed scheme is calculated for both encryption and decryption. The proposed scheme has an has efficiency according to the security measures.