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RISS 인기검색어
- 검색키워드
- 저자 : Jinbao Fang (검색결과 3 건)
- 무료
- 기관 내 무료
- 유료
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Securing the AES Cryptographic Circuit Against both Power and Fault Attacks
Jinbao Zhang,Ning Wu,Fang Zhou,Fen Ge,Xiaoqiang Zhang 대한전기학회 2019 Journal of Electrical Engineering & Technology Vol.14 No.5
Aiming to protect cryptographic circuits against physical attacks, researchers have proposed a variety of mature and effective countermeasures. However, most of these defensive technologies are used for specific and single attack, thus it is hard to thwart combined attack, such as combined power and fault attacks. In this paper, we propose a dual complementary infection countermeasure for Advanced Encryption Standard (AES) cryptographic circuit to defend against both power and fault attacks. According to the target AES circuit, we first design and construct a dual complementary AES circuit to defend against power attacks, which can balance the power consumption when processing different data. Besides, to defend against fault attacks, in the dual complementary AES circuit, we design an improved random infection mechanism to diffuse the effect of injected faults. Experiment results show that the proposed countermeasure can thwart both power and fault attacks effectively. Compared with those AES circuits which can only defend against single attack, our designed circuit increases greatly the security under extra 83.1% area overhead and 2.1% impacts on the maximum working frequency.
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Evaluation of freezing tolerance in Actinidia germplasm based on relative electrolyte leakage
Shihang Sun,Xiujuan Qi,Ran Wang,Miaomiao Lin,Jinbao Fang 한국원예학회 2020 Horticulture, Environment, and Biotechnology Vol.61 No.4
Cold stress in winter can have a disastrous eff ect on kiwifruit yield and aff ect geographical distribution. However, freezingtolerance in Actinidia genotypes remains largely unknown. Here, we report changes in metabolite content and enzymeactivity in the shoots of Actinidia genotypes exposed to low-temperature stress (− 5 °C, − 10 °C, − 15 °C, − 20 °C, − 25 °Cand − 30 °C). Moreover, the relative electrolyte leakage method was used to evaluate the freezing tolerance of kiwifruitgermplasm; 51 genotypes from 16 species of Actinidia were evaluated in total. The data revealed that relative electrolyteleakage, proline (Pro), soluble protein, and catalase (CAT) activity changed with diff erent low temperatures. Results showedthat among 16 species, A. kolomikta , A. polygama , and A. arguta had lower LT50 than other species. A. arguta , originatingfrom the northeast of China, exhibited stronger freezing resistance than the ones from other places. There was little diff erencein freezing tolerance between A. chinensis and A. deliciosa . These fi ndings provide new insights into the freezing toleranceability and mechanisms of kiwifruit and further contribute to our understanding of the relationship between freezing toleranceand geographic distribution.
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Zhi Li,Yunpeng Zhong,Danfeng Bai,Miaomiao Lin,Xiujuan Qi,Jinbao Fang 한국원예학회 2020 Horticulture, Environment, and Biotechnology Vol.61 No.5
Kiwifruit ( Actinidia sp.) vines are poorly adapted to waterlogging stress. Actinidia valvata is more tolerant against waterloggingstress than Actinidia deliciosa , and the latter contains some common rootstocks that are frequently used in kiwifruit cultivation. Little is known about the responses of A. valvata genotypes against waterlogging stress and during post-waterloggingrecovery. Here, we compared physiological traits of three A. valvata genotypes (KR1, KR3, and KR5) during waterloggingstress and recovery. Kiwifruit vines displayed water loss, a decline in the net photosynthetic rate, and inhibited shoot elongationduring waterlogging. These three genotypes could endure long-term waterlogging owing to their unique root systemconfi gurations as well as by sustaining carbohydrate reserves in the roots. Feeder roots of KR1 vines were damaged earlierand lost water more quickly than the other genotypes. Under the same stress, KR3 formed adventitious roots more rapidly,while KR5 had an improved ability to control water loss in above-ground tissues. After reoxygenation, growth of vineswas partially recovered due to water loss control, photosynthetic recovery, and carbohydrate replenishment. KR3 and KR5recovered their growth earlier and replenished more carbohydrates than KR1 after re-aeration. During waterlogging, both therelative water content and carbohydrate levels of vines can limit the recovery effi ciency after re-aeration. Our results revealedmutual and distinct responses of diff erent A. valvata genotypes during waterlogging stress and recovery and provided moreinsight into the physiological basis of their adaptation to waterlogging stress.
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