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| 1 | NEW ID-BASED GROUP SIGNATURE FROM PAIRINGS显示文摘We argue that traditional identity-based systems from pairings seem unsuitable for designing group signature schemes due to the problem of key escrow. In this paper we first propose new ID-based public key systems without trusted PKG (Private Key Generator) from bilinear pairings. In our new ID-based systems, if the dishonest PKG impersonates an honest user to communicate with others, the user can provide a proof of treachery of the PKG afterwards, which is similar to certificate-based systems. Therefore, our systems reach the Girault’s trusted level 3. We then propose a group signature scheme under the new ID-based systems, the security and performance of which rely on the new systems. The size of the group public key and the length of the signature are independent on the numbers of the group. | Chen Xiaofeng Zhang Fangguo Kwangjo Kim | 2006 | Journal of Electronics(China)2006，23，6： | 7 |
| 2 | Abyssal Circulation in the Philippine Sea显示文摘The abyssal circulation in the Philippine Sea(PS)is investigated,with outputs from the Simple Ocean Data Assimilation version 2.2.4(SODA224).The deep-water currents in SODA224 are carefully evaluated,with sparse in situ observations in the North Pacific Ocean.In the upper deep layer(20003000 m)of the PS,a strong westward current,which originates from the Northeast Pacific Basin and enters the PS through the Yap-Mariana Junction,exists along 1114 N.This strong westward current bifurcates into two western boundary currents off the Philippines.The northward-flowing current flows out of the PS around 2021 N,whereas the southward-flowing current transports deep water from the northern hemisphere to the southern hemisphere.In the lower deep layer(30004500 m),the inflow water first flows northward to the east of the Western Mariana Basin and then turns westward at approximately 18 N.The inflow water mainly enters the Philippine Basin(PB),with a small part turning southward to constitute a weak cyclonic circulation.The water entering the PB mainly merges into a strong southward western boundary current in the south-ern PB.In the bottom layer(below 4500 m),both the northeast and northwest PB show single cyclonic gyres,whereas the south PB shows a single anticyclonic gyre.Moreover,comparisons with the observations indicate the possible existence of a cyclonic sense of circulation over the Philippine Trench.The current study provides the implications for future observations,which are needed to fur-ther investigate the temporospatial variations of the abyssal circulation in the PS on multiple scales. | ZHAI Fangguo GU Yanzhen | 2020 | Journal of Ocean University of China2020，19，2： | 5 |
| 3 | Efficient Tate pairing computation using double-base chains显示文摘Pairing-based cryptosystems have developed very fast in the last few years.The effi-ciencies of these cryptosystems depend on the computation of the bilinear pairings.In this paper,a new efficient algorithm based on double-base chains for computing the Tate pairing is proposed for odd characteristic p>3.The inherent sparseness of double-base number system reduces the computational cost for computing the Tate pairing evidently.The new algorithm is 9% faster than the previous fastest method for the embedding degree k=6. | ZHAO ChangAn ZHANG FangGuo HUANG JiWu | 2008 | Science in China(Series F)2008，51，8： | 5 |
| 4 | A shift in the upper-ocean temperature trends in the South China Sea since the late 1990s显示文摘In this paper, the interdecadal variability of upper-ocean temperature in the South China Sea(SCS) is investigated based on several objectively analyzed data sets and two reanalysis data sets. The trends of the SCS sea surface temperature(SST) have changed from warming to cooling since the late 1990 s. A heat budget analysis suggests that the warming of the surface mixed layer during 1984–1999 is primarily attributed to the horizontal heat advection and the decrease of upward long wave radiation, with the net surface heat flux playing a damping role due to the increase of upward latent and sensible heat fluxes. On the other hand, the cooling of the surface mixed layer during 2000–2009 is broadly controlled by net surface heat flux, with the radiation flux playing the dominant role. A possible mechanism is explored that the variation of a sea level pressure(SLP) over the North Pacific Ocean may change the prevailing winds over the SCS, which contributes to the change of the SST in the SCS through the horizontal heat advection and heat fluxes. | WANG Zhaoyun ZHAI Fangguo LI Peiliang | 2016 | Acta Oceanologica Sinica2016，35，11： | 4 |
| 5 | Revisiting the seasonal wave height variability in the South China Sea with merged satellite altimetry observations显示文摘The seasonal variability of the significant wave height(SWH) in the South China Sea(SCS) is investigated using the most up-to-date gridded daily altimeter data for the period of September 2009 to August 2015. The results indicate that the SWH shows a uniform seasonal variation in the whole SCS, with its maxima occurring in December/January and minima in May. Throughout the year, the SWH in the SCS is the largest around Luzon Strait(LS) and then gradually decreases southward across the basin. The surface wind speed has a similar seasonal variation, but with different spatial distributions in most months of the year. Further analysis indicates that the observed SWH variations are dominated by swell. The wind sea height, however, is much smaller. It is the the largest in two regions southwest of Taiwan Island and southeast of Vietnam Coast during the northeasterly monsoon, while the largest in the central/southern SCS during the southwesterly monsoon. The extreme wave condition also experiences a significant seasonal variation. In most regions of the northern and central SCS, the maxima of the 99 th percentile SWH that are larger than the SWH theoretically calculated with the wind speed for the fully developed seas mainly appear in August–November, closely related to strong tropical cyclone activities.Compared with previous studies, it is also implied that the wave climate in the Pacific Ocean plays an important role in the wave climate variations in the SCS. | SU Hui WEI Chunlei JIANG Shaocai LI Peiliang ZHAI Fangguo | 2017 | Acta Oceanologica Sinica2017，36，11： | 4 |
| 6 | Variation of the North Equatorial Current, Mindanao Current, and Kuroshio Current in a High-Resolution Data Assimilation during 2008–2012显示文摘Outputs from a high-resolution data assimilation system, the global Hybrid Coordinate Ocean Model and Navy Coupled Ocean Data Assimilation(HYCOM+NCODA) 1/12°analysis, were analyzed for the period September 2008 to February2012. The objectives were to evaluate the performance of the system in simulating ocean circulation in the tropical northwestern Pacific and to examine the seasonal to interannual variations of the western boundary currents. The HYCOM assimilation compares well with altimetry observations and mooring current measurements. The mean structures and standard deviations of velocities of the North Equatorial Current(NEC), Mindanao Current(MC) and Kuroshio Current(KC) also compare well with previous observations. Seasonal to interannual variations of the NEC transport volume are closely correlated with the MC transport volume, instead of that of the KC. The NEC and MC transport volumes mainly show well-defined annual cycles, with their maxima in spring and minima in fall, and are closely related to the circulation changes in the Mindanao Dome(MD) region. In seasons of transport maxima, the MD region experiences negative SSH anomalies and a cyclonic gyre anomaly, and in seasons of transport minima the situation is reversed. The sea surface NEC bifurcation latitude(NBL) in the HYCOM assimilation also agrees well with altimetry observations. In 2009, the NBL shows an annual cycle similar to previous studies, reaching its southernmost position in summer and its northernmost position in winter. In 2010 and 2011,the NBL variations are dominantly influenced by La Nina events. The dynamics responsible for the seasonal to interannual variations of the NEC–MC–KC current system are also discussed. | ZHAI Fangguo WANG Qingye WANG Fujun Hu Dunxin | 2014 | Advances in Atmospheric Sciences2014，31，6： | 3 |
| 7 | Climatology and seasonal variability of satellite-derived chlorophyll a around the Shandong Peninsula显示文摘The chlorophyll a(Chl a)is an important indicator of marine ecosystems.The spatiotemporal variation of the Chl a greatly aff ects the mariculture and marine ranching in coastal waters of the Shandong Peninsula.In the current study,the climatology and seasonal variability of surface Chl-a concentration around the Shandong Peninsula are investigated based on 16 years(December 2002-November 2018)of satellite observations.The results indicate that the annual mean Chl-a concentration is greater in the Bohai Sea than in the Yellow Sea and decreases from coastal waters to off shore waters.The highest Chl-a concentrations are found in Laizhou Bay(4.2-8.0 mg/m^(3)),Haizhou Bay(4.2-5.9 mg/m^(3))and the northeast coast of the Shandong Peninsula(4.4-5.0 mg/m^(3)),resulting from the combined eff ects of the intense riverine input and long residence time caused by the concave shape of the coastline.The seasonal Chl-a concentration shows a significant spatial variation.The Chl-a concentrations in these three subregions generally exhibit an annual maximum in August/September,due to the combined eff ects of sea surface temperature,river discharge and sea surface wind.In the southeast coast region,however,the Chl-a concentration is lowest throughout the year and reaches a maximum in February with a minimum in July,forced by the seasonal evolution of the Yellow Sea Cold Water and monsoon winds.The interannual Chl-a concentration trends vary among regions and seasons.There are significant increasing trends over a large area around Haizhou Bay from winter to summer,which are mainly caused by the rising sea surface temperature and eutrophication.In other coastal areas,the Chl-a concentration shows decreasing trends,which are clearest in summer and induced by the weakening land rainfall.This study highlights the differences in the Chl-a dynamics among regions around the Shandong Peninsula and is helpful for further studies of coupled physical-ecological-human interactions at multiple scales. | Xiukai SONG Yanzhen GU Fangguo ZHAI Peiliang LI Pengxia LIU Zizhou LIU Wenfan WU Yaozu CHEN Xiangyang JIANG Jianlong HE | 2021 | Journal of Oceanology and Limnology2021，39，4： | 3 |
| 8 | Complex duality quantum computers acting on pure and mixed states显示文摘The aim of this paper is to establish a mathematical fundamental of complex duality quantum computers(CDQCs) acting on vector-states(pure states) and operator-states(mixed states),respectively.A CDQC consists of a complex divider,a group of quantum gates represented by unitary operators,or quantum operations represented by completely positive and trace-preserving mappings,and a complex combiner.It is proved that the divider and the combiner of a CDQC are an isometry and a contraction,respectively.It is proved that the divider and the combiner of a CDQC acting on vector-states are dual,and in the finite dimensional case,it is proved that the divider and the combiner of a CDQC acting on operator-states(matrix-states) are also dual.Lastly,the loss of an input state passing through a CDQC is measured. | CAO HuaiXin CHEN ZhengLi GUO ZhiHua REN FangGuo | 2012 | Science China(Physics,Mechanics & Astronomy)2012，55，12： | 3 |
| 9 | Zhuifeng tougu capsules (追风透骨胶囊) improve rheumatoid arthritis symptoms in rats by regulating the toll-like receptor 2/4-nuclear factor kappa-B signaling pathway显示文摘OBJECTIVE: To investigate the efficacy of Zhuifeng tougu capsules(追风透骨胶囊, ZFTG) in the treatment of rheumatoid arthritis(RA) in rats and study its mechanism, focusing on the toll-like receptor 2/4-nuclear factor kappa-B(TLR2/4-NF-κB) signaling pathway.METHODS: TypeⅡ collagen and an artificial climate box were used to construct the rat model of collagen-induced arthritis with wind-cold-dampness arthralgia syndrome. The rats were divided randomly into a control group, wind-cold-dampness syndrome model group, and high-, medium-,and low-dose ZFTG groups. The methotrexate(MTX) control group was treated with the corresponding drug intervention for 28 d. The joint temperature, pain threshold, joint swelling degree, and arthritis index(AI) score were measured. The production of C-reactive protein(CRP), erythrocyte sedimentation rate(ESR), and rheumatoid factors(RFs) in the blood was detected by enzyme-linked immunosorbent assay. The protein expression of TLR2, TLR4, and NF-κB in synovial tissues was detected by Western blotting, and the m RNA expression of TLR2, TLR4, and NF-κB was detected by real-time polymerase chain reaction.RESULTS: Compared with the model group, the joint temperature in each treatment group, the MTX control group, and MTX group recovered, the degree of foot swelling, pain threshold, AI score decreased, serum CRP, ESR, RF level and the levels of TLR2, TLR4, and NF-κB in synovial tissue were decreased(P < 0.05). Among them, the curative effect in the medium-dose and MTX groups was more evident(P < 0.01).CONCLUSION: ZFTG has a significant effect on RA in rats, and its mechanism may involve regulating CRP levels, the ESR, and RFs via the TLR2/4-NF-κB signaling pathway. | GONG Hui KUANG Gaoyan WU Yongrong LU Fangguo DENG Yihui HE Yanlin WANG Hengxin | 2021 | Journal of Traditional Chinese Medicine2021，41，3： | 2 |
| 10 | Seasonal variability in dissolved oxygen in the Bohai Sea,China显示文摘Deoxygenation has frequently appeared in coastal ecosystems over the past century due to the joint infl uence of increasing anthropogenically induced nutrient inputs and global warming.The semi-enclosed Bohai Sea is a typical system that is prone to deoxygenation,with regular hypoxia events consistently recorded in recent decades.Based on in-situ observation data collected in large-scale voyage surveys in the Bohai Sea during 2008-2017,the seasonal variability in dissolved oxygen(DO)and its controlling mechanisms were studied.The results indicated that in spring and autumn,the DO distributions exhibited similar spatial patterns in the surface and bottom layers,while in summer,its spatial distribution was characterized by large-scale oxygen-poor zones distributed off the Qinhuangdao Coast and the central southern Bohai Sea in the bottom layer.The controlling mechanisms of the DO distribution varied from season to season.Spring and autumn DO distributions were dominated by the seawater temperature.Under the combined eff ects of stratifi cation and decomposition,the summer bottom DO exhibited dual-core distribution.On the one hand,stratifi cation could greatly impede vertical mixing,resulting in reduced bottom DO replenishment.On the other hand,the increased bottom organic matter intensifi ed the decomposition processes,inducing massive DO consumption and elevated dissolved inorganic nitrogen concentrations.In addition,the stronger stratifi cation might be the reason for the more severe deoxygenation in the southern oxygen-poor zones in summer.Our study provides guidance for an in-depth understanding of the DO seasonality in the Bohai Sea and the mechanisms that modulate it and for the improvement of hypoxia forecasts in ocean models. | Yaozu CHEN Fangguo ZHAI Yanzhen GU Jing CAO Cong LIU Xingchuan LIU Zizhou LIU Peiliang LI | 2022 | Journal of Oceanology and Limnology2022，40，1： | 2 |
| 11 | RING PROXY SIGNATURES显示文摘Proxy signatures have been used to enable the transfer of digital signing power within some context and ring signatures can be used to provide the anonymity of a signer. By combining the functionalities of proxy signatures and ring signatures, this paper introduces a new concept, named ring proxy signature, which is a proxy signature generated by an anonymous member from a set of potential signers. The paper also constructs the first concrete ring proxy signature scheme based on the provably secure Schnorr's signatures and two ID-based ring proxy signature schemes. The security analysis is provided as well. | Wei Baodian Zhang Fangguo Chen Xiaofeng | 2008 | Journal of Electronics(China)2008，25，1： | 1 |
| 12 | Cold Water in the Lee of the Batanes Islands in the Luzon Strait显示文摘Using satellite remote sensing data and hydrological observation data,this study investigated the cold water in the lee of the Batanes Islands in the Luzon Strait.The formation of cold water in climate is mainly due to the geostrophic heat advection on the east and west sides of the Batanes Islands:the Kuroshio separates into two branches on the east and west sides of the Batanes Islands.These two branches cause two warm tongues by transferring heat from low latitudes to mid-latitudes,and then the two warm tongues lead to the formation of the relatively cold water in the lee of the Batanes Islands.Further study shows that the cold water range has obvious seasonal and inter-annual variations.Except for August,the seasonal variation of the cold water range is caused by the interaction of geostrophic heat advection and net surface heat flux,whereas the low temperature in August in the lee of the Batanes Islands is caused by the island wake effect.The inter-annual of the cold water range is related to the difference in the meridional velocity between the east and west sides of the Batanes Islands,and the correlation coefficient can reach−0.68 at the 95%confidence level. | SUN Ruili ZHAI Fangguo ZHANG Guosheng GU Yanzhen CHI Nianping | 2020 | Journal of Ocean University of China2020，19，6： | 1 |
| 13 | New receipt-free voting scheme using double-trapdoor commitment显示文摘 | CHEN Xiaofeng WU Qianhong ZHANG Fangguo | 2011 | Information Sciences2011，181，8： | 1 |
| 14 | Outcome of hepatitis C virus infection in Chinese paid plasma donors: A 12–19‐year cohort study显示文摘 | Hui‐YingRao De‐GuiSun Rui‐FengYang FengLiu JianWang BoFeng NanWu Ji‐LianFang Guang‐JunSong HuiMa FangGuo Jiang‐HuaWang Xiao‐BoLi QianJin HongQin HuiZhuang LaiWei | 2012 | Journal of Gastroenterology and Hepatology2012，，3： | 1 |
| 15 | A note on the Ate pairing显示文摘 | Zhao Chang-an Zhang Fangguo Huang Jiwu | 2008 | International Journal of Information Security2008，，6： | 1 |
| 16 | Dynamic asymmetric group key agreement for Ad Hoc networks显示文摘 | Zhao Xingwen Zhang Fangguo Tian Haibo | 2011 | Ad Hoc Networks2011，，9： | 1 |
| 17 | Discrete logarithm based Chameleon hashing and signatures without key exposure显示文摘 | CHEN Xiaofeng ZHANG Fangguo TIAN Haibo | 2011 | Com- puters and Electrical Engineering2011，37，4： | 1 |
| 18 | Selectively unforgeable but existentially forgeable signature schemes and applications显示文摘This paper gives definitions,constructions and applications of signature schemes,which are selectively unforgeable but existentially forgeable(SUEF).We formalize the special notion under conditions of chosen message attack(CMA) and known message attack(KMA).Then two general constructions are presented with two concrete examples.We apply the SUEF secure signature schemes to an elementary authentication mechanism,the challenge-response mechanism,to obtain a basic deniable authentication method.The method is presented as a deniable message transmission(MT) authenticator in the extension framework of Raimondo. | TIAN HaiBo ZHANG FangGuo CHEN XiaoFeng WEI BaoDian | 2013 | Science China(Information Sciences)2013，56，1： | 1 |
| 19 | Dynamic asymmetric group key agreement for ad hoc networks 显示文摘 | Zhao Xingwen Zhang Fangguo Tian Haibo | 2011 | Ad Hoc Networks2011，9，5： | 1 |
| 20 | Memory leakage-resilient secret sharing schemes显示文摘A secret sharing scheme is a method to share secrets among some shareholders such that the shared secrets can be recovered only by certain authorized sets, not by the unauthorized sets. However, in practice,attackers who corrupted an unauthorized set are often able to obtain some or even all of the uncorrupted shareholders' memory information by a great variety of side channel attacks. Then, they can illegally obtain the partial information or even all of the shared secrets. Facing such attacks, all existing secret sharing schemes are no longer secure. In this paper, we investigate how to construct secure secret sharing schemes with the presence of memory leakage, we call them memory leakage-resilient secret sharing schemes(MLR-SS schemes).We present the formal definition of MLR-SS scheme and construct two MLR-SS schemes by combining the existing secret sharing schemes with physical unclonable functions(PUFs). With these two concrete examples,we are attempting to demonstrate the use of PUFs in constructing MLR-SS schemes. | DAI ShuGuang WEI JinFeng ZHANG FangGuo | 2015 | Science China(Information Sciences)2015，58，11： | 1 |
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