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Universally composable oblivious transfer from ideal lattice

Frontiers of Computer Science 2019年第4期13卷 879-906页

作者： momeng liu Yupu HU State Key Laboratory of Integrated Service Networks Xidian University Xi'an 710071 China

As a fundamental cryptographic primitive, oblivious transfer (OT) is developed for the sake of efficient usability and combinational feasibility. However, most OT protocols are built upon some quantum non-immune cryptosystems by assuming the hardness of discrete logarithm or factoring problem, whose security will break down directly in the quantum setting. Therefore, as a subarea of postquantum cryptography, lattice-based cryptography is viewed as a promising alternative and cornerstone to support for building post-quantum protocols since it enjoys some attractive properties, such as provable security against quantum adversaries and lower asymptotic complexity. In this paper, we first build an efficient 1-out-of-2 OT protocol upon the hardness of ring learning with errors (RLWE) problem, which is at least as hard as some worst-case ideal lattice problems. We show that this 1-out-of-2 OT protocol can be universally composable and secure against static corruptions in the random oracle model. Then we extend it to a general case, i.e., 1-out-of-N OT with achieving the same level of security. Furthermore, on the basis of the above OT structure, we obtain two improved OT protocols using two improved lattice-based key exchange protocols (respectively relying on the RLWE problem and learning with errors (LWE) problem, and both achieving better efficiency by removing the Gaussian sampling for saving cost) as building blocks. To show that our proposed OT protocol indeed achieves comparable security and efficiency, we make a comparison with another two lattice-based OT protocols in the end of the paper. With concerning on the potential threat from quantum computing and expecting on the practical use of OT with high efficiency, an efficient post-quantum OT protocol is pressing needed. As shown in this paper, our proposed OT protocols may be considered as post-quantum OT candidates since they can both preserve provable security relying on lattice problems and enjoy practical eff

关键词： oblivious transfer universally composability lattice-based cryptography learning with errors ring learning with errors random oracle model

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Identity-Based Blind Signature from Lattices

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Wuhan University Journal of Natural Sciences 2017年第4期22卷 355-360页

作者： GAO Wen HU Yupu WANG Baocang XIE Jia liu momeng State Key Laboratory of Integrated Service Networks Xidian University Xi'an 710071 Shaanxi China

Blind signature allows a user to get a signature of a signer on an arbitrary message,and the verifier can convince that the signature is indeed signed by the signer without leaking any information about the *** property is necessary when the user’s privacy needs protection,such as a bank bill,a trade secret,*** an alternative of public key infrastructure,the identity-based system can simplify the key management procedures in certificate-based public key *** by the requirement of identity-based blind signature in the post quantum world,we research on identity-based blind signature based on hard lattice problems under the random Oracle *** propose a construction built upon the blind signature by Rückert,and it is proved to be one-more unforgeable against selective identity and chosen message attacks（s ID-CMA）and unconditionally *** proposed scheme has 2 moves,and its security can be reduced to the small integer solution（SIS）problem.

关键词： lattice-based cryptography identity-based blind signature unforgeable

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基于代理车辆的车载网络消息认证技术

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计算机工程与应用 2022年第5期58卷 131-137页

作者：王梦婷王伟张强刘沫萌西安工程大学计算机科学学院西安710048

车载自组织网络(vehicular ad hoc network,VANET)的固有特性使其存在诸多安全问题。特别地,当路边单元(RSU)的覆盖区域中出现大量车辆时,现有认证方法难以确保RSU快速对每辆车进行签名认证。因此,提出一种新的基于代理车辆的消息认证... 详细信息

车载自组织网络(vehicular ad hoc network,VANET)的固有特性使其存在诸多安全问题。特别地,当路边单元(RSU)的覆盖区域中出现大量车辆时,现有认证方法难以确保RSU快速对每辆车进行签名认证。因此,提出一种新的基于代理车辆的消息认证方法。代理车辆对其他车辆的消息进行验证,将验证结果传输给附近的RSU,RSU再验证代理车辆的输出结果,从而达到降低RSU计算开销的目的。在椭圆曲线离散对数问题下,证明了提出的方法满足消息认证的安全需求。仿真结果表明,与传统认证方法相比,采用所提出的认证方法验证3000条消息所需时间减少了76%,更高效地满足VANET的消息认证。

关键词：代理车辆消息认证隐私保护

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融合纹理增强和注意力图的面部属性编辑方法

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纺织高校基础科学学报 2021年第3期34卷 112-120页

作者：项家伟王伟刘沫萌西安工程大学计算机科学学院陕西西安710048

针对现有面部编辑方法存在着修改与特定属性无关区域,无法编辑细粒度面部的问题,提出一种融合注意力图和纹理增强的细粒度特征空间的面部属性编辑方法。在生成对抗网络中引入纹理增强和注意力图,解决空间特征提取不明显问题;采用多尺度... 详细信息

针对现有面部编辑方法存在着修改与特定属性无关区域,无法编辑细粒度面部的问题,提出一种融合注意力图和纹理增强的细粒度特征空间的面部属性编辑方法。在生成对抗网络中引入纹理增强和注意力图,解决空间特征提取不明显问题;采用多尺度鉴别器,获得有关原始图像更多语义场信息和细节信息;采用交替训练策略,提高面部属性编辑图像质量和算法鲁棒性。在CelebA数据集上验证了提出面部属性编辑方法的正确率和有效性。实验结果表明,提出的方法不仅能准确的编辑细粒度面部属性,而且能大幅度提高图像质量。

关键词：面部属性编辑生成对抗网络注意力图纹理增强特征空间

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一种面向符号社交网络的负链路预测方法

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西安工程大学学报 2021年第3期35卷 100-106页

作者：王伟薛苗苗刘沫萌西安工程大学计算机科学学院陕西西安710048

针对符号社交网络中存在负链路特征融合和挖掘有效信息不足,导致预测性能较低的问题,提出了一种新的特征融合的负链路预测方法。该方法在经典的结构平衡理论和社会地位理论基础上,构造出4种与负符号相关的特征,包括节点特征、结构特征... 详细信息

针对符号社交网络中存在负链路特征融合和挖掘有效信息不足,导致预测性能较低的问题,提出了一种新的特征融合的负链路预测方法。该方法在经典的结构平衡理论和社会地位理论基础上,构造出4种与负符号相关的特征,包括节点特征、结构特征、相似性特征和评分特征,利用逻辑回归算法实现了负链路预测。在Epinions和Slashdot 2个典型的符号网络数据集上对其有效性进行验证。实验结果表明:与基准方法相比,提取的方法的精确率在2个数据集上分别提高了约4.5%和10.4%,F 1分数分别提高了约27.3%和31.5%,达到了提升负链路预测效果的目的。

关键词：符号网络社会网络链路预测负面关系特征融合

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热图引导连接的人体姿态估计方法

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西安工程大学学报 2021年第5期35卷 107-115页

作者：王伟王仓龙裴哲刘沫萌西安工程大学计算机科学学院陕西西安710048

人体姿态估计是计算机视觉研究领域的重要方向之一,广泛应用于人类活动识别、人机交互等方面,但人体姿态估计方法准确度上通常表现较差。基于上述问题,提出一种基于热图引导连接(heatmap-guided connection,HGC)的人体姿态估计方法,用... 详细信息

人体姿态估计是计算机视觉研究领域的重要方向之一,广泛应用于人类活动识别、人机交互等方面,但人体姿态估计方法准确度上通常表现较差。基于上述问题,提出一种基于热图引导连接(heatmap-guided connection,HGC)的人体姿态估计方法,用于在保持低算法复杂度的同时提高回归精度。HGC方法利用关键点热图引导关键点回归,并采用一种尺度自适应热图估计,以处理人体实例在尺度的多样性;然后,通过构建一种联合最终姿态结构和关键点热值的评分网络,实现待估计姿势与数据集中真实姿态良好的拟合效果。实验结果表明,低复杂度情况下,所提出的HGC方法在COCO数据中平均精度得分达到72.9,优于当前主流的算法。

关键词：人体姿态估计热图引导连接关键点检测尺度自适应

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一种基于身份的车载网消息认证方法

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西安工程大学学报 2020年第6期34卷 86-91,98页

作者：王梦婷王伟张强刘沫萌西安工程大学计算机科学学院陕西西安710048

车载网(vehicular ad hoc network,VANET)的认证方法大多采用双线性对运算,不但计算成本较高,且存在节点身份易在非安全传输信道遭受泄露、消息认证速度不够理想等问题。为此,提出一种基于身份的消息认证方法,实现VANET环境下的消息认... 详细信息

车载网(vehicular ad hoc network,VANET)的认证方法大多采用双线性对运算,不但计算成本较高,且存在节点身份易在非安全传输信道遭受泄露、消息认证速度不够理想等问题。为此,提出一种基于身份的消息认证方法,实现VANET环境下的消息认证。该方法在使用匿名认证保护用户隐私的同时,采用批量消息认证:一方面满足了车辆节点与路边单元节点间的消息认证的需求,另一方面确保了车载网络信息的安全传输。仿真结果表明:提出的方法执行批量验证过程的时间较传统方法提高了约72.5%,达到了降低运算复杂性的目的。

关键词：匿名认证消息认证隐私保护车载自组织网络批量认证

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Interplay between creeping fat and gut microbiota: A brand-new perspective on fecal microbiota transplantation in Crohn's disease

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World Journal of Gastroenterology 2025年第2期31卷 138-143页

作者： Ying Wang Jie liu Department of Life Sciences and Medicine South District of Endoscopic CenterThe First Affiliated Hospital of University of Science and Technology of ChinaUniversity of Science and Technology of ChinaHefei 230001Anhui ProvinceChina Department of Gastroenterology The First Affiliated Hospital of University of Science and Technology of ChinaHefei 230001Anhui ProvinceChina

Inflammatory bowel disease,particularly Crohn's disease(CD),has been linked to modifications in mesenteric adipose tissue(MAT)and the phenomenon known as"creeping fat"(CrF).The presence of CrF is believed to serve as a predictor for early clinical recurrence following surgical intervention in patients with ***,the incorporation of the mesentery during ileocolic resection for CD has been correlated with a decrease in surgical recurrence,indicating the significant role of MAT in the pathogenesis of *** numerous studies have indicated that dysbiosis of the gut microbiota is a critical factor in the development of CD,the functional implications of translocated microbiota within the MAT of CD patients remain *** manuscript commentary discusses a recent basic research conducted by Wu et *** their study,intestinal bacteria from individuals were transplanted into CD model mice,revealing that fecal microbiota trans-plantation(FMT)from healthy donors alleviated CD symptoms,whereas FMT from CD patients exacerbated these ***,FMT was found to affect intestinal permeability,barrier function,and the levels of proinflammatory factors and ***,these findings suggest that targeting MAT and CrF may hold therapeutic potential for patients with ***,the study did not evaluate the composition of the intestinal microbiota of the donors or the subsequent alterations in the gut ***,the gut microbiota plays a crucial role in the histopathology of CD,and thus,targeting MAT and CrF may represent a promising avenue for treatment in this patient population.

关键词： Crohn's disease Mesenteric adipose tissue Creeping fat Fecal microbiota transplantation Gut microbiota

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Network pharmacology:Changes the treatment mode of"one disease-one target"in cancer treatment

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World Journal of Gastrointestinal Oncology 2025年第1期17卷 268-271页

作者： Shuai liu Yong-Wei Yu Department of Cardiology The First People’s Hospital of JiashanJiaxing 314100Zhejiang ProvinceChina Department of Critical Care Medicine The First Affiliated Hospital of Zhejiang University School of MedicineHangzhou 310000Zhejiang ProvinceChina

The article concluded that network pharmacology provides new ideas and insights into the molecular mechanism of traditional Chinese medicine(TCM)treatment of *** is a new choice and hot spot in the field of cancer *** have also previously published studies on TCM and network *** this letter,we summarize the new paradigm of network pharmacology in cancer treatment mechanisms.

关键词： Network pharmacology Cancer Multicomponent Multitarget Therapy

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Interconnections between diabetic corneal neuropathy and diabetic retinopathy:diagnostic and therapeutic implications

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Neural Regeneration Research 2025年第8期20卷 2169-2180页

作者： Mingyi Yu Faith Teo En Ning Chang liu Yu-Chi liu Tissue Engineering and Stem Cell Group Singapore Eye Research InstituteSingapore Yong Loo Lin School of Medicine National University of SingaporeSingapore Department of Cornea and External Eye Disease Singapore National Eye CenterSingapore Ophthalmology and Visual Sciences Academic Clinical Program Duke-NUS Medical SchoolSingapore

Diabetic corneal neuropathy and diabetic retinopathy are ocular complications occurring in the context of diabetes *** corneal neuropathy refers to the progressive damage of corneal *** retinopathy has traditionally been considered as damage to the retinal ***,growing evidence suggests that diabetic retinopathy is a complex neurovascular disorder resulting from dysfunction of the neurovascular unit,which includes both the retinal vascular structures and neural *** retinopathy is one of the leading causes of blindness and is frequently screened for as part of diabetic ocular ***,diabetic corneal neuropathy is commonly overlooked and underdiagnosed,leading to severe ocular surface *** studies have found that these two conditions tend to occur together,and they share similarities in their pathogenesis pathways,being triggered by a status of chronic *** review aims to discuss the interconnection between diabetic corneal neuropathy and diabetic retinopathy,whether diabetic corneal neuropathy precedes diabetic retinopathy,as well as the relation between the stage of diabetic retinopathy and the severity of corneal *** also endeavor to explore the relevance of a corneal screening in diabetic eyes and the possibility of using corneal nerve measurements to monitor the progression of diabetic retinopathy.

关键词： cornea corneal nerves diabetes diabetic corneal neuropathy diabetic retinopathy retina

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