A novel modified KASUMI block chiper for global system for mobile communications

Abstract

KASUMI and SNOW-3G are encryption algorithms that are used to provide security in GSM, 3G mobile networks. Many security attacks like rectangle-attack, sandwich-attack, single-key attack, etc. breach the security of the traditional KASUMI block chiper. In order to enhance the security in the traditional KASUMI block chiper, we have proposed the modifications in traditional KASUMI by introducing Rijndaels’s S-box which is present in the SNOW-3G block chiper. Also, we propose to remove the FI function completely from the traditional KASUMI block chiper and suggest the modification in the FO function. In the proposed KASUMI block cipher, two FO functions are introduced that are FO(a) and FO(b). In FO(a), a 16-bit S-box is added, where in FO(b), cyclic shift operation is added. The simulation results show the performance improvement of the proposed work over conventional work in terms of total encryption time and speed.

KEYWORDS:

• KASUMI
• FO function
• S-boxes
• NIST statistical test suite

Disclosure statement

No potential conflict of interest was reported by the authors.

Additional information

Notes on contributors

Raja Muthalagu

Raja Muthalagu received his Ph.D. in Wireless Communication from the National Institute of Technology (NIT), Tiruchirappalli, India in 2014. He joined the Department of Electrical and Electronics Engineering, BITS, Pilani, Dubai Campus, in 2015, where he is currently a full Assistant Professor. He was a postdoctoral research fellow at ATMRI, Nanyang Technological University (NTU), Singapore during 2014–2015. He was a recipient of Canadian Commonwealth Scholarship Award-2010 for Graduate Student Exchange Program in the Department of Electrical and Computer Engineering, University of Saskatchewan, Saskatoon, SK, Canada. His research interests include orthogonal frequency division multiplexing (OFDM), multiple-input and multiple-output (MIMO) systems, and network security.

Subeen Jain

Subeen Jain is B.E. (Honors) student of Electronics and Communications engineering in BITS-Pilani Dubai campus. His areas of interest include security algorithms mainly related to mobile security and networking and areas related to telecommunications.