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2012 International Conference on Innovations in Information Technology, IIT 2012

作者： Zhao, Wei Wang, Yi Li, Renfa Embedded System and Network Laboratory Hunan University Changsha Hunan 410082 China Hunan Province Key Laboratory of Network and Information Security Hunan University Changsha Hunan 410082 China College of Information Science and Engineering Hunan University Changsha Hunan 410082 China Department of Electrical and Computer Engineering National University of Singapore Singapore 117576 Singapore

ISBN: (纸本)9781467311014

Recently, there is a new kinds of cryptographic algorithms are proposed to meet the requirements of "lightweight" applications. PRESENT is one of them, which is built based on 4-bit substitution transformation (S-box) and suitable for low cost hardware implementations. Usually, there needs two 4-bit S-boxes, Sp, ISp, for PRESENT encryption and decryption, in which ISp can be computed from Sp. Therefore, we proposed a unified architecture to supporting the operations of PRESENT encryption and decryption. There also exists a kind of power analysis attacks pose a serious threat on hardware based PRESENT. In order to resist against DPA, we proposed a new masking scheme for PRESENT, in which the nonlinear substitution needs to be carefully masked. In order to reduce the hardware resources for the proposed masking scheme, we reuse the masked Sp to generate masked ISp. The experimental results show that our proposed unified masked PRESENT takes up only one time larger than the unmasked existing design. But, it is obvious that our proposed design has the ability to defend against DPA. © 2012 IEEE.

关键词： Computer architecture

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Coordinated dynamic mission planning scheme for intelligent multi-agent systems

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Journal of Central South University 2012年第11期19卷 3170-3179页

作者：彭军文孟飞谢国祺张晓勇 Kuo-chi LIN School of Information Science and Engineering Central South UniversityChangsha 410075China Hunan Engineering Laboratory for Advanced Control and Intelligent Automation(Central South University) Changsha 410075China Embedded Systems and Networking Laboratory Hunan Provincial Key Laboratory of Network and Information Security(Hunan University)Changsha 410075China Department of Mechanical and Aerospace Engineering University of Central FloridaOrlandoFL 32816USA

Mission planning was thoroughly studied in the areas of multiple intelligent agent systems,such as multiple unmanned air vehicles,and multiple processor ***,it still faces challenges due to the system complexity,the execution order constraints,and the dynamic environment *** address it,a coordinated dynamic mission planning scheme is proposed utilizing the method of the weighted AND/OR tree and the *** the scheme,the mission is decomposed into a time-constraint weighted AND/OR tree,which is converted into an AOE-network for mission ***,a dynamic planning algorithm is designed which uses task subcontracting and dynamic re-decomposition to coordinate *** scheme can reduce the task complexity and its execution time by implementing real-time dynamic *** simulation proves the effectiveness of this approach.

关键词： weighted AND/OR tree multiple intelligent agent coordinated dynamic mission planning AOE-network

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An improved masked S-box for AES and hardware implementation

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Journal of Convergence Information Technology 2012年第10期7卷 338-344页

作者： Zeng, Juanli Xu, Cheng Embedded System and Network Laboratory Hunan Province Key Lab. of Network and Information Security College of Inf. Sci. and Engineering Hunan University Changsha 410082 China

Masking in gate level is popularly used to protect AES S-box against power analysis attacks. But there still exists a kind of attack, called glitch attack, to achieve the sensitive information from gate cell leakage. Some works had been done to resist against glitch attack, which carefully masked AND gate or used Wave Dynamic Differential Logic (WDDL) cell. In this paper, we propose an improved masked AND gate, in which the relationship between input masked values and masks is nonlinear. Usually, when converting S-box operations from GF(28) to GF(((22)2)22), all the necessary computations become XOR and AND operations. Therefore, to fully mask AES S-box is to substitute the unmasked XOR and AND operations with the proposed masked AND gate and protected XOR gate. Although the proposed masked AND gate take up one extra XOR gate than Trichina's design and Baek's design, it can resist against glitch attack without using specific gate cell, such as WDDL. Finally with the masked AES Sbox, we provide a probable secure implementation of masked AES encryption with 32-bit data and verify the results.

关键词： Field programmable gate arrays (FPGA)

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FPGA based optimized SHA-3 finalist in reconfigurable hardware

FPGA based optimized SHA-3 finalist in reconfigurable hardwa...

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2011 International Symposium on Integrated Circuits, ISIC 2011

作者： Song, Qian Wang, Yi Li, Zhican Zhou, Quan Wu, Wufei Han, Demin Xu, Wenlong Chen, Zuo Li, Renfa Embedded Systems and Networking Laboratory Hunan University Hunan Provincial Key Laboratory of Network and Information Security China

ISBN: (纸本)9781612848648

A hash function is well-defined procedure to convert large, uncertain long message into fixed small integers. Secure Hash Algorithm (SHA) is an one-way message digest algorithm which is usually used in cryptographic applications such as authentication, digital signature and data integrity. In this paper, we proposed the reconfigurable structure for SHA-3 finalist BLAKE, Grøstl, JH, Keccak and Skein, separately. The proposed reconfigurable Grøstl, JH and Keccak could support different digested sizes. And Skein and BLAKE optimized three different modes using one single hardware core. The experimental results showed that our proposed structure could support different parameters of SHA-3 finalist with comparable performance among the existing works when ported to Xilinx Virtex-5 FPGA platform. © 2011 IEEE.

关键词： Field programmable gate arrays (FPGA)

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Secret sharing based countermeasure for AES S-box

Secret sharing based countermeasure for AES S-box

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2011 International Symposium on Integrated Circuits, ISIC 2011

作者： Wang, Yi Yuan, Zheng Li, Zhican Li, Renfa Embedded Systems and Networking Laboratory Hunan University Hunan Provincial Key Laboratory of Network and Information Security Changsha China

ISBN: (纸本)9781612848648

Cryptographic devices are vulnerable to Differential Power Attack (DPA) in embedded systems. Masking methods are popularly used to defend against DPA by masking all intermediate data with random values. However, masking schemes on algorithm level are vulnerable to Higher-Order DPA (HODPA), while on gate level glitch attack is the biggest threaten attack. In this paper, we proposed a secret sharing based countermeasure for AES S-box, which can defend against both HODPA and glitch attack. The experimental results show that our proposed design takes up less hardware resources and achieves faster speed compared with the existing methods. © 2011 IEEE.

关键词： Field programmable gate arrays (FPGA)

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A unified architecture for supporting operations of AES and ECC

A unified architecture for supporting operations of AES and ...

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2011 4th International Symposium on Parallel Architectures, Algorithms and Programming, PAAP 2011

作者： Wang, Yi Li, Renfa Embedded Systems and Networking Laboratory Hunan Province Key Laboratory of Network and Information Security Hunan University Changsha 410082 China

ISBN: (纸本)9780769545752

In the recent years, embedded systems began to be used in sensitive applications such as personal digital assistants and smart cards. Due to very strict cost and power constrains, the support for cryptography provided by these devices is often limited to either public or private key primitives. This limitation is much more evident in devices where the cryptographic algorithms are implemented using hardware resources. In this paper, we propose an extension of a public-key cryptosystem to support also private-key, and we evaluate our architecture on FPGA platforms. In particular, we propose a new arithmetic unit in which the polynomial modular multiplication of ECC is extended to compute also the polynomial arithmetic operations over binary extended field of AES. We compare our design with an architecture obtained by instantiating state of the art implementation of AES and ECC and we evaluate the trade-offs. The experimental results show that our proposed architecture takes up less hardware resources. Nevertheless, the achieved performances are better compared to the ECC reference core, while the ones compared to AES only implementation are comparable with the state of the art.1 © 2011 IEEE.

关键词： Smart cards

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FPGA based optimized SHA-3 finalist in reconfigurable hardware

FPGA based optimized SHA-3 finalist in reconfigurable hardwa...

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International Symposium on Integrated Circuits (ISIC)

作者： Qian Song Yi Wang Zhican Li Quan Zhou Wufei Wu Demin Han Wenlong Xu Zuo Chen Renfa Li Embedded Systems & Networking Laboratory Hunan Provincial Key Laboratory of Network and Information Security Hunan University China

A hash function is well-defined procedure to convert large, uncertain long message into fixed small integers. Secure Hash Algorithm (SHA) is an one-way message digest algorithm which is usually used in cryptographic applications such as authentication, digital signature and data integrity. In this paper, we proposed the reconfigurable structure for SHA-3 finalist BLAKE, Grostl, JH, Keccak and Skein, separately. The proposed reconfigurable Grostl, JH and Keccak could support different digested sizes. And Skein and BLAKE optimized three different modes using one single hardware core. The experimental results showed that our proposed structure could support different parameters of SHA-3 finalist with comparable performance among the existing works when ported to Xilinx Virtex-5 FPGA platform.

关键词： Throughput Field programmable gate arrays Hardware Algorithm design and analysis NIST Encryption

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A Unified Architecture for Supporting Operations of AES and ECC

A Unified Architecture for Supporting Operations of AES and ...

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International Symposium on Parallel Architectures, Algorithms and Programming (PAAP)

作者： Yi Wang Renfa Li Embedded Systems and Networking Laboratory Hunan Province Key Laboratory of Network and Information Security Hunan University Changsha China

关键词： Elliptic curve cryptography Polynomials Algorithm design and analysis Computer architecture Computer science Hardware

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Secret sharing based countermeasure for AES S-box

Secret sharing based countermeasure for AES S-box

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International Symposium on Integrated Circuits (ISIC)

作者： Yi Wang Zheng Yuan Zhican Li Renfa Li Embedded Systems & Networking Laboratory Hunan Provincial Key Laboratory of Network and Information Security Hunan University Changsha China

关键词： Logic gates Hardware Resistance Encryption Resists Algorithm design and analysis

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A delay-derivative-dependent approach to robust H ∞ filter design for uncertain systems with time-varying distributed delays

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Journal of the Franklin Institute 2011年第2期348卷 179-200页

作者： Jiyao An Guilin Wen Nianfei Gan Renfa Li State Key Laboratory of Advanced Design and Manufacture for Vehicle Body the Key Laboratory of Advanced Design and Simulation Techniques for Special Equipment Ministry of Education Hunan University Changsha 410082 PR China School of Computer and Communication Institute of Embedded Systems and Network Hunan University Changsha 410082 PR China

This paper focuses on the problem of robust H ∞ filter design for uncertain systems with time-varying state and distributed delays. System uncertainties are considered as norm-bounded time-varying parametric uncertainties . The delays are assumed to be time-varying delays being differentiable uniformly bounded with delay-derivative bounded by a constant, which may be greater than one. A new delay-derivative-dependent approach of filter design for the systems is proposed. A novel Lyapunov–Krasovskii functional (LKF) is employed, and a tighter upper bound of its derivative is obtained by employing an inequality and using free-weighting matrices technique, then the proposed result has advantages over some existing results, in that it has less conservatism and it enlarges the application scope. An improved sufficient condition for the existence of such a filter is established in terms of linear matrix inequality (LMI). Finally, illustrative examples are given to show the effectiveness and reduced conservatism of the proposed method.

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