A Specialized Lightweight Metamorphic Function for KASUMI Metamorphic Cipher and Its FPGA Implementation

Abstract

To enhance the performance of the KASUMI Metamorphic Cipher, we apply a lightweight Metamorphic Structure. The proposed structure uses four lightweight bit-balanced operations in the function Meta-FO of the KASUMI Metamorphic Cipher. These operations are: XOR, INV, XNOR, and NOP for bitwise XOR, invert, XNOR, and no operation respectively building blocks of the Specialized Crypto Logic Unit (SCLU). In this work, we present a lightweight KASUMI Specialized-Metamorphic Cipher. In addition, we provide a Field Programmable Gate Array (FPGA) implementation of the proposed algorithm modification. Index Terms—KASUMI, Metamorphic, Lightweight, Cipher, FPGA.