Reduction in Computational Complexity of a Fast Encryption Algorithm for Application in Voice Oriented System

摘要

Security for voice is different from that for data and so most of the encryption algorithms used for data do not suit voice as voice is delay sensitive. Here, we make use of an algorithm that suits multimedia traffic because of its reduced complexity and its ability to handle large blocks of data at a time. The optimization is achieved through reduction in the instructions executed for performing the encryption and decryption which involves a number of complex multiplications. A simplified matrix multiplication scheme is used which reduces the number of instructions executed per multiplication cycle. As the key transmission, encryption and decryption phases make use of many multiplications the improved scheme helps in achieving reduction in the computational delay. Also the realization of the security algorithm is done by implementing it over a basic Client server model.