Information Security - MITSUBISHI ELECTRIC

KASUMI IP

Overview

KASUMI is a symmetric-key encryption algorithm developed in 2000 as the standard encryption algorithm for next-generation W-CDMA*1 mobile communications. In 2002, the GSM Association, the standardization association promoting a global system for mobile communications (GSM*2), announced its decision to adopt KASUMI as the standard encryption technology for GSM.

KASUMI IP utilizes a hardware implementation technology derived from MISTY to achieve high speed and compact size. It provides the F8*3 and F9*4 modes of operation specified by 3GPP, and calculates each at speeds faster than 10 Mbps. It also has an extremely small gate size.

Features

KASUMI is available in two core types: an ultra-small core for terminal devices and a high-speed core for base stations.

Ultra-Small Core for Terminal Devices

•	There are two types of cores each for the F8 and F9 modes of operation.
•	16-bit I/O interface.
•	Hardware size and throughput are as follows:

Target Device	Area Size	Throughput
ASIC 0.18µm	6.5 Kgates	130 Mbps
FPGA Xilinx XC4000	230 CLBs	35 Mbps

High-Speed Core for Base Stations

•	There are a total of three types of cores: one type each for the F8 and F9 modes of operation, plus one type that supports both modes.
•	32/64-bit I/O interface.
•	Hardware size and throughput are as follows:

Target Device	Area Size	Throughput
ASIC 0.18µm	14 Kgates	850 Mbps
FPGA Xilinx Virtex	850 slices	160 Mbps

*1 W-CDMA:	Wideband Code Division Multiple Access. Technology used for wireless communications, such as mobile phones.
*2 GSM:	Global System for Mobile Communication. Wireless communication technology used in digital mobile phones.
*3 F8:	Algorithm used for the confidentiality of data. It protects the confidentiality of wireless communication data.
*4 F9:	Algorithm used to ensure data integrity. It detects data tampering by attaching a digital signature to the data.