Abstract—Governmental bodies, such as military and national security agencies, keep looking for proprietary encryption algorithms to secure their confidential communication applications. Customizing published encryption algorithms is a trend to acquire proprietary encryption algorithms at affordable research and development cost. Cost, here, may be represented by the required efforts for designing and testing the customized algorithm. The security architecture of the 3rd Generation Partnership Project (3GPP) mobile communications includes a standardized encryption algorithm F8 which is based on the KASUMI block cipher algorithm. In this paper we propose a newly customized version of the KASUMI block cipher. The customization is targeting the S-boxes of KASUMI. New S-Boxes are generated and tested to verify the required cryptographic features.

Index Terms—KASUMI block cipher algorithm, 3GPP, strict avalanche criterion, UMTS.

N. H. Shaker is with the Electronics and Communication Department, MIU, Cairo, Egypt (e-mail: nabil.hamdy@miuegypt.edu.eg).
H. H. Issa, K. A. Shehat, and S. N. Hashem are with the Electronics and Communication Department, AAST, Cairo, Egypt (e-mail: hanady.hussien@ieee.org, k_shehata@aast.edu, somaia_nh@yahoo.com).

Cite:Nabil H. Shaker, Hanady H. Issa, Khaled A. Shehata, and Somaia N. Hashem, "Design of F8 Encryption Algorithm Based on Customized Kasumi Block Cipher," International Journal of Computer and Communication Engineering vol. 2, no. 4, pp. 398-402, 2013.