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Entropy 2015, 17(6), 3692-3709; doi:10.3390/e17063692

The Switching Generator: New Clock-Controlled Generator with Resistance against the Algebraic and Side Channel Attacks

1
The 2nd branch, Defense Security Institute, Seosomun-ro Jung-gu, Seoul 100-120, Korea
2
Center for Information Security Technologies (CIST), Korea University, Seoul 136-701, Korea
3
Department of Mathematics, University of Seoul, Seoul 130-743, Korea
*
Author to whom correspondence should be addressed.
Academic Editors: James Park and Wanlei Zhou
Received: 18 March 2015 / Revised: 11 May 2015 / Accepted: 1 June 2015 / Published: 4 June 2015
View Full-Text   |   Download PDF [229 KB, uploaded 4 June 2015]   |  

Abstract

Since Advanced Encryption Standard (AES) in stream modes, such as counter (CTR), output feedback (OFB) and cipher feedback (CFB), can meet most industrial requirements, the range of applications for dedicated stream ciphers is decreasing. There are many attack results using algebraic properties and side channel information against stream ciphers for hardware applications. Al-Hinai et al. presented an algebraic attack approach to a family of irregularly clock-controlled linear feedback shift register systems: the stop and go generator, self-decimated generator and alternating step generator. Other clock-controlled systems, such as shrinking and cascade generators, are indeed vulnerable against side channel attacks. To overcome these threats, new clock-controlled systems were presented, e.g., the generalized alternating step generator, cascade jump-controlled generator and mutual clock-controlled generator. However, the algebraic attack could be applied directly on these new systems. In this paper, we propose a new clock-controlled generator: the switching generator, which has resistance to algebraic and side channel attacks. This generator also preserves both security properties and the efficiency of existing clock-controlled generators. View Full-Text
Keywords: clock-controlled generator; algebraic attack; side channel attack; switching generator; period and linear complexity clock-controlled generator; algebraic attack; side channel attack; switching generator; period and linear complexity
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

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MDPI and ACS Style

Choi, J.; Moon, D.; Hong, S.; Sung, J. The Switching Generator: New Clock-Controlled Generator with Resistance against the Algebraic and Side Channel Attacks. Entropy 2015, 17, 3692-3709.

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