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Universally composable one-time signature and broadcast authentication

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Science China(Information Sciences) 2010年第3期53卷 567-580页

作者： moon SangJae Mobile Network Security Technology Research Center Kyungpook National University

Broadcast authentication is a vital security primitive for the management of a copious number of parties. In the universally composable framework, this paper investigates broadcast authentication using one-time signature based on the fact that one-time signature has efficient signature generation and verification suitable for low-power devices, and gives immediate authentication, which is a favorable property for time-critical messages. This paper first formulates a broadcast authentication model with the ideal functionalities such as one-time signature and broadcast authentication, and proposes a broadcast authentication scheme in the hybrid model. This paper then improves HORS, which is secure based on a strong assumption (i.e., a subset-resilient hash function) and presents the improved version as HORS+, which diffiers from HORS such that it is a secure one-time signature based on weaker assumptions, i.e. one-way functions, one-way hash functions and collisionresistant hash functions. At the same time, a protocol OWC using one-way chains is proposed to provide more registered keys for multi-message broadcast authentication. Our broadcast authentication scheme constructed by the combined use of HORS+ and OWC is universally composable secure and suitable for low-power devices.

关键词： network security universally composable security broadcast authentication one-time signature

Provably Secure Identity-based Group Key Exchange Protocol

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China Communications 2007年第4期4卷 11-22页

作者： SangJae moon Mobile Network Security Technology Research Center Kyungpook National University

Group key management is one of the basic building blocks in securing group communication.A number of solutions to group key exchange have been proposed,but most of them are not scalable and,in particular,require at least 0(log n) communication *** formally present a constant -round Identity-based protocol with forward secrecy for group key exchange,which is provably secure in the security model introduced by Bresson et *** protocol focuses on round efficiency and the number of communication round is only one greater than the lower bound presented by Becker and ***,the protocol provides a batch verification technique,which simultaneously verifies the validity of messages from other group participants and greatly improves computational ***,in our protocol,it is no necessary of always-online key generation center during the execution of the protocol compared to other Identity-based protocols.

关键词： provable security group key exchange bilinear pairings

Authentication Methods for 802.11s Mesh Networks

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China Communications 2007年第1期4卷 56-65页

作者： SangJae moon Mobile Network Security Technology Research Center

With the rapid development of the WLAN,the 802. 11 s mesh network is ***,adaptability and scalability are the most important attributes of a mesh ***,the security in an 802.11s mesh network is not well defined or specified,and there is no standard method to authenticate a mesh point that is creating a mesh *** this paper,we propose solutions for the authentication of mesh *** the Basic Infrastructure Security Mode,we combine the 802.1X/EAP and neighbor graph to realize the fast mutual authentication between a new mesh point and every its mesh *** prove that our scheme maintains the security of the standardized EAP authentication *** the same time,the simulation result shows that the authentication latency of our scheme is much lower than that of the scheme in[2].In the Basic Decentralized Security Mode(BDSM),802.11s mesh networks are very similar to ad hoc networks,but they are different in several *** first analyze the differences between *** on this analysis, we investigate the main authentication methods used in ad hoc networks and select the pairwise key pre-distribution model and identity-based model for the WLAN mesh network.

关键词： authentication 802.11s mesh networks ad hoc networks

Universally composable secure TNC model and EAP-TNC protocol in IF-T

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Science China(Information Sciences) 2010年第3期53卷 465-482页

作者： moon SangJae Mobile Network Security Technology Research Center Kyungpook National University

This paper analyzes trusted network connect (TNC) protocols within the universally composable (UC) framework. We propose the first TNC model in the UC framework by first designing the TNC ideal functionality FTNC, the EAP ideal functionality FEAP and the EAP-TNC ideal functionality FE-PA. Then, we construct a trusted network connect protocol named TK-TNC that UC-realizes FTNC in the (FEAP, FE-PA)- hybrid model. Subsequently, we perform a security analysis on protocol D-H PN given in the TCG specification and show that this protocol cannot securely realize the EAP-TNC ideal functionality and be resistant to an attack. Finally, we propose an alternative protocol using the twin Diffie-Hellman key-exchange technique, named protocol TD-H PN, which can securely realize the EAP-TNC ideal functionality in the (FREG, FCERT)-hybrid model.

关键词： network security universally composable security trusted network connect

Effect of chromium interlayer thickness on interfacial thermal conductance across copper/diamond interface

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International Journal of Minerals,Metallurgy and Materials 2022年第11期29卷 2020-2031页

作者： Xiaoyan Liu Fangyuan Sun Wei Wang Jie Zhao Luhua Wang Zhanxun Che Guangzhu Bai Xitao Wang Jinguo Wang moon JKim Hailong Zhang State Key Laboratory for Advanced Metals and Materials University of Science and Technology BeijingBeijing 100083China School of Energy and Environmental Engineering University of Science and Technology BeijingBeijing 100083China Beijing Institute of Structure and Environment Engineering Beijing 100076China Department of Materials Science and Engineering University of Texas at DallasRichardsonTX 75080USA Institute of Engineering Thermophysics Chinese Academy of SciencesBeijing 100190China Shandong Provincial Key Laboratory for High Strength Lightweight Metallic Materials Advanced Materials InstituteQilu University of Technology(Shandong Academy of Sciences)Jinan 250014China Collaborative Innovation Center of Steel Technology University of Science and Technology BeijingBeijing 100083China

The thermal conductivity of diamond particles reinforced copper matrix composite as an attractive thermal management material is significantly lowered by the non-wetting *** paper investigates the heat transport behavior between a 200-nm Cu layer and a single-crystalline diamond substrate inserted by a chromium(Cr)interlayer having a series of thicknesses from 150 nm down to 5 *** purpose is to detect the impact of the modifying interlayer thickness on the interfacial thermal conductance(h)between Cu and *** time-domain thermoreflectance measurements suggest that the introduction of Cr interlayer dramatically improves the h between Cu and diamond owing to the enhanced interfacial adhesion and bridged dissimilar phonon states between Cu and *** h value exhibits a decreasing trend as the Cr interlayer becomes thicker because of the increase in thermal resistance of Cr *** high h values are observed for the Cr interlayer thicknesses below 21 nm since phononic transport channel dominates the thermal conduction in the ultrathin Cr *** findings provide a way to tune the thermal conduction across the metal/nonmetal heterogeneous interface,which plays a pivotal role in designing materials and devices for thermal management applications.

关键词： sputtering diamond metal/nonmetal interface interfacial thermal conductance time-domain thermoreflectance

Risk factors for metachronous gastric carcinoma development after endoscopic resection of gastric dysplasia: Retrospective, single-center study

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World Journal of Gastroenterology 2017年第24期23卷 4407-4415页

作者： Hee Seok moon Gee Young Yun Ju Seok Kim Hyuk Soo Eun Sun hyung Kang Jae Kyu Sung Hyun Yong Jeong Kyu-Sang Song Department of Internal Medicine Chungnam National University Hospital Chungnam National University School of Medicine Department of Pathology Chungnam National University Hospital Chungnam National University School of Medicine

AIM To determine the gastric adenocarcinoma(GAC)occurrence rate and related factors,we evaluated the follow-up results of patients confirmed to have gastric dysplasia after endoscopic resection(ER).METHODS We retrospectively analyzed the medical records,endoscopic examination records,endoscopic procedure records,and histological records of 667 cases from641 patients who were followed-up for at least 12mo,from among 1273 patients who were conformed to have gastric dysplasia after Endoscopic mucosal resection(EMR)or endoscopic submucosal dissection (ESD)of gastric mucosal lesions between January 2007and August 2013 at the Chungnam National University *** The mean follow-up period was 33.8 mo,and the median follow-up period was 29 mo(range:12-87).During the follow-up period,the occurrence of metachronous GAC was 4.0%(27/667).The mean and median interval periods between the occurrence of metachronous GAC and endoscopic treatment of gastric dysplasia were 36.3 and 34 mo,respectively(range:16-71).The factors related to metachronous GAC occurrence after ER for gastric dysplasia were male sex(5.3%vs 1.0%),open-type atrophic gastritis(9.5%vs3.4%),intestinal metaplasia(6.8%vs 2.4%),and highgrade dysplasia(HGD;8.4%vs 3.2%).Among them,male sex[OR:5.05(1.18-21.68),P=0.029],intestinal metaplasia[OR:2.78(1.24-6.23),P=0.013],and HGD[OR:2.70(1.16-6.26),P=0.021]were independent related factors in multivariate ***,24of 27 GAC cases(88.9%)occurred at sites other than the previous resection sites,and 3(11.1%)occurred at the same site as the previous resection *** Male sex,intestinal metaplasia,and HGD were significantly related to the occurrence of metachronous GAC after ER of gastric dysplasia,and most GACs occurred at sites other than the previous resection sites.

关键词：胃的发育异常瘤秒主要内视镜的 mucosal 切除术胃瘤

Paeonol attenuates inflammation-mediated neurotoxicity and microglial activation

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Neural Regeneration Research 2013年第18期8卷 1637-1643页

作者： Kyong Nyon Nam Byung-Cheol Woo Sang-Kwan moon Seong-Uk Park Joo-young Park Jae-Woong Hwang hyung-Sup Bae Chang-Nam Ko Eunjoo Hwang Lee Graduate School of East-West Medical Science Kyung Hee University Department of Cardiovascular & Neurologic Diseases (Stroke Center) Hospital of Oriental Medicine Kyung Hee University

Chronic activation of microglial cells endangers neuronal survival through the release of various proinflammatory and neurotoxic factors. The root of Paeonia lactiflora Pall has been considered useful for the treatment of various disorders in traditional oriental medicine. Paeonol, found in the root of Paeonia lactiflora Pall, has a wide range of pharmacological functions, including anti-oxidative, anti-inflammatory and neuroprotective activities. The objective of this study was to examine the efficacy of paeonol in the repression of inflammation-induced neurotoxicity and microglial cell activation. Organotypic hippocampal slice cultures and primary microglial cells from rat brain were stimulated with bacterial lipopolysaccharide. Paeonol pretreatment was performed for 30 minutes prior to lipopolysaccharide addition. Cell viability and nitrite （the production of nitric oxide）, tumor necrosis factor-alpha and interleukin-lbeta products were measured after lipopolysaccharide treatment. In organotypic hippocampal slice cultures, paeonol blocked lipopolysaccharide-related hippocampal cell death and inhibited the release of nitrite and interleukin-lbeta. Paeonol was effective in inhibiting nitric oxide release from primary microglial cells. It also reduced the lipopolysaccharide-stimulated release of tumor necrosis factor-alpha and intefleukin-1β from microglial cells. Paeonol possesses neuroprotective activity in a model of inflammation-induced neurotoxicity and reduces the release of neurotoxic and proinflammatory factors in activated microglial cells.

关键词： neural regeneration traditional Chinese medicine brain inflammation interleukin-lbeta microglia neurotoxicity neuroprotection nitric oxide organotypic hippocampal slice culture Paeonia lactifloraPall paeonol tumor necrosis factor-alpha neuroregeneration

Enhancing ammonia production rates from electrochemical nitrogen reduction by engineering three-phase boundary with phosphorus-activated Cu catalysts

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Journal of Energy Chemistry 2023年第9期84卷 394-401页

作者： Jeehye Kim Cho Hee Lee Yong Hyun moon Min Hee Lee Eun Hyup Kim Sun Hee Choi Youn Jeong Jang Jae Sung Lee School of Energy and Chemical Engineering Ulsan National Institute of Science and Technology(UNIST)Ulsan 44919Republic of Korea Department of Chemical Engineering Hanyang UniversitySeoul 04763Republic of Korea Pohang Accelerator Laboratory(PAL) Pohang University of Science and Technology(POSTECH)Pohang 37673Republic of Korea

Electrochemical N_(2) reduction reaction(eNRR) over Cu-based catalysts suffers from an intrinsically low activity of Cu for activation of stable N_(2) molecules and the limited supply of N_(2) to the catalyst due to its low solubility in aqueous ***,we propose phosphorus-activated Cu electrocatalysts to generate electron-deficient Cu sites on the catalyst surface to promote the adsorption of N_(2) *** eNRR system is further modified using a gas diffusion electrode(GDE) coated with polytetrafluoroethylene(PTFE) to form an effective three-phase boundary of liquid water-gas N_(2)-solid catalyst to facilitate easy access of N_(2) to the catalytic *** a result,the new catalyst in the flow-type cell records a Faradaic efficiency of 13.15% and an NH_(3) production rate of 7.69 μg h^(-1) cm^(-2) at-0.2 V_(RHE),which represent 3.56 and 59.2 times increases from those obtained with a pristine Cu electrode in a typical electrolytic *** work represents a successful demonstration of dual modification strategies;catalyst modification and N_(2) supplying system engineering,and the results would provide a useful platform for further developments of electrocatalysts and reaction systems.

关键词： Electrochemical nitrogen reduction reaction Ammonia production Phosphorous modified copper electrodes Gas diffusion electrodes Three-phase boundary PTFE coating

Neurotoxicity of cancer chemotherapy

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Neural Regeneration Research 2013年第17期8卷 1606-1614页

作者： Miyoung Yang Changjong moon Department of Veterinary Anatomy College of Veterinary Medicine and Animal Medical Institute Chonnam National University Department of Physiology and Neuroscience Program Michigan State University

There is accumulating clinical evidence that chemotherapeutic agents induce neurological side effects, including memory deficits and mood disorders, in cancer patients who have undergone chemotherapeutic treatments. This review focuses on chemotherapy-induced neurodegeneration and hippocampal dysfunctions and related mechanisms as measured by in vivo and in vitro approaches. These investigations are helpful in determining how best to further explore the causa mechanisms of chemotherapy-induced neurological side effects and in providing direction for the future development of novel optimized chemotherapeutic agents.

关键词： neural regeneration reviews neurogenesis behavioral dysfunction chemotherapy hippocampaldysfunction memory deficit mood disorder neurodegeneration neuron neuroplasticity neurotoxicity grants-supported paper neuroregeneration