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arXiv 2022年

作者： Chen, Xiaofeng Gao, Ying School of Cyber Science and Technology Beihang University China Key Laboratory of Aerospace Network Security Ministry of Industry and Information Technology China

Redactable blockchains allow modifiers or voting committees with modification privileges to edit the data on the chain. Trapdoor holders in chameleon-based hash redactable blockchains can quickly compute hash collisions for arbitrary data, and without breaking the link of the hash-chain. However, chameleon-based hash redactable blockchain schemes have difficulty solving the problem of multi-level editing requests and competing for modification privileges. In this paper, we propose CDEdit, a highly applicable redactable blockchain with controllable editing privilege and diversified editing types. The proposed scheme increases the cost of invalid or malicious requests by paying the deposit on each edit request. At the same time, the editing privilege is subdivided into request, modification, and verification privileges, and the modification privilege token is distributed efficiently to prevent the abuse of the modification privilege and collusion attacks. We use chameleon hashes with ephemeral trapdoor (CHET) and ciphertext policy attribute-based encryption (CP-ABE) to implement two editing types of transaction-level and block-level, and present a practical instantiation and security analysis. Finally, the implementation and evaluation show that our scheme only costs low-performance overhead and is suitable for multi-level editing requests and modification privilege competition scenarios. Copyright © 2022, The Authors. All rights reserved.

关键词： blockchain

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CDEdit: Redactable blockchain with Cross-audit and Diversity Editing

CDEdit: Redactable Blockchain with Cross-audit and Diversity...

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IEEE International Conference on Trust, security and Privacy in Computing and Communications (TrustCom)

作者： Xiaofeng Chen Ying Gao School of Cyber Science and Technology Beihang University China Key Laboratory of Aerospace Network Security Ministry of Industry and Information Technology China

Redactable blockchain allows modifiers or voting committees with modification privileges to edit the data on the chain. Among them, trapdoor holders in chameleon-based hash redactable blockchains can quickly compute hash collisions for arbitrary data without breaking the link of the hash-chain. However, chameleon-based hash redactable blockchain schemes have difficulty solving issues such as editing operations with different granularity or conflicts and auditing modifiers that abuse editing privileges. To address the above challenges, we propose a redactable blockchain with Cross-audit and Diversity Editing (CDEdit). The proposed scheme distributes subdivided transaction-level and block-level tokens to the matching modifier committee to weaken the influence of central power. A number of modifiers are unpredictably selected based on reputation value proportions and the mapping of the consistent hash ring to enable diversity editing operations, and resist Sybil attacks. Meanwhile, an adaptive cross-auditing protocol is proposed to adjust the roles of modifiers and auditors dynamically. This protocol imposes a reputation penalty on the modifiers of illegal edits and solves the problems of abuse of editing privileges and collusion attacks. In addition, We used ciphertext policy attribute-based encryption (CP-ABE) and chameleon hashes with ephemeral trapdoor (CHET) for data modification, and present a system steps and security analysis of CDEdit. Finally, the extensive comparisons and evaluations show that our scheme costs less time overhead than other schemes and is suitable for complex application scenarios, e.g. IoT data management.

关键词： Performance evaluation data privacy Protocols Costs System performance Resists blockchains

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Ppt4j: Patch Presence Test for Java Binaries

Ppt4j: Patch Presence Test for Java Binaries

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International Conference on Software Engineering (ICSE)

作者： Zhiyuan Pan Xing Hu Xin Xia Xian Zhan David Lo Xiaohu Yang The State Key Laboratory of Blockchain and Data Security Zhejiang University Hangzhou China Software Engineering Application Technology Lab Huawei Hangzhou China The Hong Kong Polytechnic University Hong Kong China School of Computing and Information Systems Singapore Management University Singapore

ISBN: (数字)9798400702174

ISBN: (纸本)9798350382143

The number of vulnerabilities reported in open source software has increased substantially in recent years. security patches provide the necessary measures to protect software from attacks and vulnerabilities. In practice, it is difficult to identify whether patches have been integrated into software, especially if we only have binary files. Therefore, the ability to test whether a patch is applied to the target binary, a.k.a. patch presence test, is crucial for practitioners. However, it is challenging to obtain accurate semantic information from patches, which could lead to incorrect results. In this paper, we propose a new patch presence test framework named Ppt4j (Patch Presence Test forJava Binaries). Ppt4j is designed for open-source Java libraries. It takes Java binaries (i.e. bytecode files) as input, extracts semantic information from patches, and uses feature-based techniques to identify patch lines in the binaries. To evaluate the effectiveness of our proposed approach Ppt4j, we construct a dataset with binaries that include 110 vulnerabilities. The results show that Ppt4j achieves an F1 score of 98.5% with reasonable efficiency, improving the baseline by 14.2%. Furthermore, we conduct an in-the-wild evaluation of Ppt4j on JetBrains IntelliJ IDEA. The results suggest that a third-party library included in the software is not patched for two CVEs, and we have reported this potential security problem to the vendor.

关键词： Java Semantics Feature extraction Libraries security Software measurement data mining

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Improved Density-Based data Association Method Under Azimuth Rate Constraint

Improved Density-Based Data Association Method Under Azimuth...

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IEEE/OES China Ocean Acoustics (COA)

作者： Bin Qi Chenxin Hui Yu Hao Xiang Li P. Takis Mathiopoulos National Key Laboratory of Underwater Acoustic Technology Harbin Engineering University Harbin China Key Laboratory of Marine Information Acquisition and Security (Harbin Engineering University) Ministry of Industry and Information Technology Harbin China College of Underwater Acoustic Engineering Harbin Engineering University Harbin China Department of Informatics and Telecommunications National and Kapodistrian University of Athens Greece

ISBN: (数字)9798350340297

ISBN: (纸本)9798350340303

Passive sonar has been extensively researched in recent years. However, bearing-only tracking faces significant challenges because passive detection only provides target information. Traditional algorithms estimate target states using Rao-Blackwellized Monte Carlo data Association and form target trajectories using clustering and label management algorithms. However, the tracking effectiveness of this method depends on the results of the clustering algorithm, which leads to trajectory discontinuity in scenarios with target trajectory crossings. This study addresses the problem of trajectory crossing in passive scenarios by proposing an improved clustering method and label management logic. The experimental results confirmed that the proposed algorithm in this scenario can accurately estimate the number of targets and achieve robust target tracking.

关键词： Target tracking Accuracy Monte Carlo methods Azimuth Simulation Oceans Clustering algorithms Sonar Trajectory Faces

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Cooperative Estimation to Reconstruct the Time-varying Flow Field Using Multiple AUVs

Cooperative Estimation to Reconstruct the Time-varying Flow ...

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第43届中国控制会议

作者： Yue Yu Jing Yan Chenxu Pan Jianhang Zhou Xian Yang Zhigang Shang Institute of Electrical Engineering Yanshan University National Key Laboratory of Underwater Acoustic Technology Harbin Engineering University Key Laboratory of Marine Information Acquisition and Security (Harbin Engineering University) Ministry of Industry and Information Technology College of Underwater Acoustic Engineering Harbin Engineering University Sanya Nanhai Innovation and Development Base of Harbin Engineering University

ISBN: (数字)9789887581581

ISBN: (纸本)9798350366907

We investigate the problem of recovering the flow field of time-varying parameters from the motion data of sensors of an autonomous underwater vehicle(AUV) in this *** develop a parametric flow model based on the concept of incompressibility to provide physical theoretical ***,considering the influence of the unknown flow field on the AUVs trajectory,we define:1) the deviation between the actual relative position and the predicted relative position between each vehicle and its neighbors are regarded as the relative motion integral error,which can be obtained by local measurement;2) The deviation between the actual position and the predicted position of each vehicle is regarded as the absolute motion integral error,which can be obtained by the global positioning system(GPS).We establish the relationship between the motion integration error and the time-varying flow field,and formulate it as a set of nonlinear equations,a row-wise iterative algorithm is proposed to estimate the time-varying flow ***,the effectiveness of the algorithm is verified by simulation.

关键词： Multi-autonomous Underwater Vehicle Time-varying Flow Field Motion Integration Error Parametric Model

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Suppression of Cross-Terms in the Wigner-Ville Distribution of Underwater Static Target Echo

Suppression of Cross-Terms in the Wigner-Ville Distribution ...

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IEEE/OES China Ocean Acoustics (COA)

作者： Wencheng Xu Xiukun Li Ge Yu National Key Laboratory of Underwater Acoustic Technology (Harbin Engineering University) Key Laboratory of Marine Information Acquisition and Security (Harbin Engineering University) Ministry of Industry and Information Technology College of Underwater Acoustic Engineering (Harbin Engineering University) Harbin China Sanya Nanhai Innovation and Development Base of Harbin Engineering University Harbin and Sanya China

ISBN: (数字)9798350340297

ISBN: (纸本)9798350340303

The echo information components of underwater static targets are intricate and encompass vital details regarding target shape and structure. When the active sonar emission signal adopts a linear frequency modulation (LFM) signal, the target echo comprises superimpositions of multiple LFM signals with varying amplitudes and delays. Although the Wigner-Ville distribution (WVD) serves as a potent tool for analyzing LFM signals, the WVD for multicomponent LFM signals yields numerous cross-terms. These cross-terms impede further assessment of signal quantity and information content. Consequently, in this study, a novel approach to suppress cross-terms is proposed. By extracting the WVD along the frequency slope direction, the extracted results undergo filtering via a window function and are subsequently multiplied by a summation suppression factor to further attenuate cross-terms and noise. Moreover, in this study, a comparative analysis of different window functions is conducted. Simulation experiments and practical data processing confirm the effectiveness of the proposed method in this study.

关键词： Frequency modulation Chirp modulation Shape Filtering Oceans Noise Sonar data processing data models Delays

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Integration of Deep Neural Networks and Local Mean Decomposition for Accurate Underwater Acoustic Channel Estimation

Integration of Deep Neural Networks and Local Mean Decomposi...

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International Bhurban Conference on Applied Sciences & technology, IBCAST

作者： Mansoor Jan Suleman Mazhar Muhammad Adil Aman Muhammad Qiao Gang National Key Laboratory of Underwater Acoustic Technology Harbin Engineering University Harbin China Key Laboratory of Marine Information Acquisition and Security Ministry of Industry and Information Technology Harbin Engineering University Harbin China College of Underwater Acoustic Engineering Harbin Engineering University Harbin China

ISBN: (数字)9798350308259

ISBN: (纸本)9798350308266

Accurate estimation of underwater acoustic channel is crucial for reliable communication in harsh underwater conditions. However, because of the dynamic nature of the underwater acoustic channel, reliable estimation of underwater acoustic channel is difficult. To overcome this problem, we offer a new method for improving UWA channel estimations that combines Deep Neural Networks (DNNs) with Local Mean Decomposition (LMD). To efficiently understand the complicated relationships within the UWA channel data, our proposed technique integrates Convolutional Neural Networks (CNNs) and Recurrent Neural Networks (RNNs) which captures both spatial and temporal dependencies by using the capabilities of both CNNs and RNN s, allowing for a comprehensive understanding of the UW A channel properties. In addition, we use LMD as a post-processing step at the receiver. LMD enables us to extract meaningful information from noisy signals, improving the accuracy of the estimated underwater acoustic channel. We can limit the negative impacts of noise and interference on received signals by successfully mitigating noise from them, resulting in increased performance. We performed simulations to compare the performance of our proposed model with conventional underwater acoustic channel estimation strategies. Results from simulations show that our approach surpasses these existing algorithms on key parameters including bit error rate (BER) and signal-to-noise ratio (SNR). These results suggest that our technique has a lot of potential for enhancing the reliability and efficiency of underwater acoustic communication systems in complicated underwater environments. The implications of our proposed method are significant, since it allows for improved performance in severe underwater environments. Our method improves the overall reliability of underwater communication systems by giving more precise estimations of the underwater acoustic channel. This remarkable development has far-reaching impli

关键词： Wireless sensor networks Accuracy Recurrent neural networks Bit error rate Channel estimation Estimation Receivers Reliability Underwater acoustics Signal to noise ratio

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Energy-Efficient Routing Protocol Based on data Dissemination for Underwater Wireless Sensor Network

Energy-Efficient Routing Protocol Based on Data Disseminatio...

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OCEANS

作者： Xuerui Liu Feng Zhou National Key Laboratory of Underwater Acoustic Technology Harbin Engineering University Harbin China Key Laboratory of Marine Information Acquisition and Security Harbin Engineering University Ministry of Industry and Information Technology Harbin China College of Underwater Acoustic Engineering Harbin Engineering University Harbin China

Underwater wireless sensor network (UWSN) has attracted much research interest in recent years, especially suitable routing protocols. In this paper, we design a multi-hop energy-efficient routing protocol based on data distribution. Specifically, we consider the actual underwater three-dimensional model, which results in severe energy consumption. During data transmission, relay nodes will serve for data distribution for the purpose of energy efficiency, where the nodes farther away from the surface sink node undertake fewer data forwarding tasks. The amount of data transmitted by each relay node is quantitatively related to the distance. Meanwhile, the TDMA MAC protocol is reasonably applied to the acoustic link. The simulations demonstrate that our routing protocol outperforms the reference algorithms in terms of network lifetime and energy consumption balance.

关键词：

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A Q-Learning-Based Multi-Hop Energy-Efficient and Low Collision MAC Protocol for Underwater Acoustic Wireless Sensor Networks

A Q-Learning-Based Multi-Hop Energy-Efficient and Low Collis...

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International Bhurban Conference on Applied Sciences & technology, IBCAST

作者： Wazir Ur Rahman Qiao Gang Zhou Feng Zahid Ullah Khan Muhammad Aman Irfan Ullah National Key Laboratory of Underwater Acoustic Technology Harbin Engineering University Harbin China Key Laboratory of Marine Information Acquisition and Security Ministry of Industry and Information Technology (Harbin Engineering University) Harbin China College of Underwater Acoustic Engineering Harbin Engineering University Harbin China

ISBN: (数字)9798350308259

ISBN: (纸本)9798350308266

Underwater acoustic wireless sensor networks (UAWSNs) are being confess as a valuable tool for studying and monitoring aquatic environments. However, the unique characteristics of acoustic communication in UAWSNs present significant challenges. These challenges include high latency, which refers to delays in transmitting data, low available bandwidth, which limits the amount of data that can be transmitted, and a high bit error rate, which refers to errors that occur during the transmission of data. Addressing these aforementioned challenges is critical to the successful deployment and operation of UAWSNs for environmental monitoring and other applications. Contention-based medium access control (MAC) protocols are not suited for use in UAWSNs because to their lower efficiency as compared to terrestrial networks because of the distinctive attributes of UAWSNs. To address this issue, a contention-free MAC protocol is deemed more suitable, as it offers greater reliability and flexibility in overcoming the challenges posed by acoustic signals. This protocol may also increase the network's throughput and energy efficiency by removing the potential of collisions, thereby achieving high performance. In this research, we proposed a new multi-hop energy-efficient and low collision MAC protocol using Q-learning technique for UAWSNs. The proposed MAC protocol is designed to address the challenges of UAWSNs, such as low available bandwidth, high latency, and high bit error rate. By utilizing a Q-learning approach, the protocol is able to make informed decisions in selecting the optimal communication path while minimizing energy consumption and reducing the occurrence of collisions. This is achieved through a multi-hop approach that allows for efficient data transmission across the network. The protocol's energy efficiency and collision avoidance capabilities make it a promising candidate for use in various underwater applications, including environmental monitoring, underwater

关键词： Wireless sensor networks Energy consumption Protocols Q-learning Media Access Control Spread spectrum communication Throughput Energy efficiency Environmental monitoring Underwater acoustics

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Experimental Verification of Vertical Line Array Shape Estimation Based on Single Normal Mode Extraction

Experimental Verification of Vertical Line Array Shape Estim...

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2021 OES China Ocean Acoustics, COA 2021

作者： Tan, Peng Lu, Licheng Ren, Qunyan Yang, Desen Acoustic Science and Technology Laboratory Key Laboratory of Marine Information Acquisition and Security Harbin Engineering University Ministry of Industry and Information Technology College of Underwater Acoustic Engineering Harbin China Chinese Academy of Sciences Key Laboratory of Underwater Acoustic Environment Institute of Acoustics Beijing China

ISBN: (纸本)9781728181905

The shape of the long line array is required to correct signal processing data and locate underwater targets precisely. In this paper, the warping transform form with waveguide invariant (β) is adopted to extract the single normal mode (3rd and 4th) through the compression processing broadband sound source signal of the vertical line array, which is based on underwater acoustic propagation sea trial data conducted in shallow waters of the South China Sea in November 2017. This method verifies the relationship between the single normal mode phase for the vertical line array sound field and shape. The results are consistent with the vertical line array attitude sensor measurement method. © 2021 IEEE.

关键词： Extraction

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