Design and implementation of efficient cipher engine for IEEE 802.11i compatible with IEEE 802.11n and IEEE 802.11e

Authors:
Duhyun Bae;Gwanyeon Kim;Jiho Kim;Sehyun Park;Ohyoung Song
Affiliations:
School of Electrical and Electronic Engineering, Chung-Ang University, Seoul, Korea;School of Electrical and Electronic Engineering, Chung-Ang University, Seoul, Korea;School of Electrical and Electronic Engineering, Chung-Ang University, Seoul, Korea;School of Electrical and Electronic Engineering, Chung-Ang University, Seoul, Korea;School of Electrical and Electronic Engineering, Chung-Ang University, Seoul, Korea
Venue:
CIS'05 Proceedings of the 2005 international conference on Computational Intelligence and Security - Volume Part II
Year:
2005

Citing 2
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Real 802.11 Security: Wi-Fi Protected Access and 802.11i

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Abstract

For high data rate, new MAC mechanisms such as Block Ack in IEEE 802.11e and frame aggregation in IEEE 802.11n are being currently discussed and these mechanisms need short response time in each MPDU processing. In this paper, we propose a design of cipher engine for IEEE 802.11i to support these new mechanisms. We reduce the processing overhead of RC4 key scheduling by means of using the dual S-Box scheme. In CCMP design, parallel structure is proposed, and as a result, we reduce the processing time to 1/2 in comparison with the sequential structure and the response time independent of the size of the payload and only dependent on the clock frequency. In addition, we can expect to decrease power consumption in CMOS design process because the clock frequency reduces to 1/5 and the area doubles compared to the typical designs.