BRRC: A Hybrid Approach Using Block Cipher and Stream Cipher

Abstract

Design of cryptographic algorithms has ever been meant for making messages confidential strong enough for cryptanalysts. This has resulted into different categories of encryption/decryption algorithms while they have their own pros and cons. The cryptanalysts have played roles in observing confidential messages, identifying used algorithms to encrypt messages, and they have been successful in exploiting the weak points, if found any, in the algorithms’ designs. But Hybrid cryptographic algorithms, which bring mixture of randomness in the ciphered text, are ones of some obstacles for them. It is more difficult to break the hybrid ciphered text than that of block or stream cipher text. The current work presents design of a hybrid algorithm that makes uses of content replication removal in input data, block cipher and stream cipher cryptographic algorithms.