An efficient reuse-based approach to implement the 3GPP KASUMI block cipher
Tomás Balderas-Contreras, Rene Cumplido-Parra · 2005
Abstract— The KASUMI block cipher is found at the core of both the f8 data confidentiality algorithm and the f9 data integrity algorithm, which play an important role in the security architecture of modern third generation (3G) cellular communications networks. This paper describes a technique to design and implement the KASUMI block cipher using a principle based on the iteration over a minimum number of hardware components. The features of the technique include strategies to reduce and simplify KASUMI’s regular Feistel structure, the use of frequency division and the exploitation of the facilities provided by the implementation technology: Field Programmable Logic Array (FPGA). The result is a digital system that reaches a higher throughput with fewer resources.