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2021 International Conference on Computer, Information and Telecommunication Systems (CITS)最新文献

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Stealthy Data Exfiltration via TCP Sequence Numbers based Covert Channel 基于隐蔽通道的TCP序列号的秘密数据泄露
Jonah Goverman, Ali Tekeoglu
Ex-filtration of confidential data from a compromised network node become increasingly difficult given modern day defenses, such as deep packet inspection filters, next generation firewalls, anomaly based behavioral intrusion detection systems, and data loss/leak prevention systems. There are various proposed methods in the literature to establish covert channels for stealthy data extraction, however most of them cause anomalies in the network traffic and could be flagged by the state-of-the art defensive network technologies. In this paper, we describe a novel approach, along with a proof-of-concept implementation, for creating a covert channel that fits well within the bounds of RFC-793, utilizing Transmission Control Protocol (TCP) Sequence Numbers. This method encodes the data to be ex-filtrated within TCP sequence numbers, and adds random bytes as payload to each packet to keep the communication compatible with TCP. By designing the proposed data ex-filtration channel to function within RFC standards, we aimed to increase our ability to blend into the regular network traffic and hide from network monitoring tools. We tested our method against an open source intrusion detection system, Snort, and was able to evade detection.
考虑到现代防御措施,如深度包检测过滤器、下一代防火墙、基于异常的行为入侵检测系统和数据丢失/泄漏预防系统,从受损网络节点中过滤机密数据变得越来越困难。文献中提出了各种方法来建立隐蔽通道以进行隐形数据提取,但是大多数方法会导致网络流量异常,并且可以通过最先进的防御网络技术进行标记。在本文中,我们描述了一种新颖的方法,以及一个概念验证实现,用于利用传输控制协议(TCP)序列号创建一个非常适合RFC-793边界的隐蔽通道。该方法将需要过滤的数据编码在TCP序列号中,并在每个数据包中添加随机字节作为有效载荷,以保持与TCP的通信兼容。通过设计建议的数据过滤通道,使其在RFC标准中发挥作用,我们的目标是提高我们融入常规网络流量和隐藏网络监控工具的能力。我们针对开源入侵检测系统Snort测试了我们的方法,并且能够逃避检测。
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引用次数: 0
Location analysis for a grocery store based on a multi-objective optimization approach 基于多目标优化方法的杂货店选址分析
İpek Çebi, Dionysis Goularas
In this paper, we propose a method allowing to find the optimum location for a grocery store in an urban area. In our algorithm, we use a multi-objective optimization approach where for a given geographic area, we extract a set of solutions based on two criteria: The first one attempts to minimize the distance from places like restaurants, bus stations, etc. as these places denote a pedestrian traffic. The second one tries to maximize the distance from other existing grocery stores, in order to find a location with less competition. The multi-objective genetic algorithm (MOGA) utilized proposes a set of solutions that cannot dominate each other. Therefore, for the geographic area analyzed by MOGA, after detecting the surfaces corresponding to buildings based on color map information, we calculate the average weighted mean of the building surfaces. Hence, we are selecting among the solutions proposed by MOGA the closest one to the calculated weighted mean, in an effort to be located near a dense population. After testing the system with different scenarios, we show that this application is able to propose adequate locations in respect to the predefined criteria.
在本文中,我们提出了一种方法,允许找到一个杂货店在城市地区的最佳位置。在我们的算法中,我们使用了一种多目标优化方法,对于给定的地理区域,我们基于两个标准提取一组解决方案:第一个尝试最小化与餐馆、公交车站等地的距离,因为这些地方表示行人交通。第二种是尽量扩大与其他现有杂货店的距离,以便找到一个竞争较少的地点。多目标遗传算法(MOGA)提出了一组不相互支配的解。因此,对于MOGA分析的地理区域,在根据彩色地图信息检测出建筑物对应的表面后,计算建筑物表面的加权平均值。因此,我们在MOGA提出的解决方案中选择最接近计算加权平均值的解决方案,以努力位于密集人口附近。在用不同的场景测试了系统之后,我们证明了该应用程序能够根据预定义的标准提出适当的位置。
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引用次数: 0
CITS 2021 Cover Page CITS 2021封面
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引用次数: 0
Workload Distribution on Heterogeneous Platforms 异构平台上的工作负载分布
Mahmoud Alasmar, C. F. Bazlamaçci
This paper targets the problem of finding an efficient distribution of a computational task on a heterogeneous computing platform. The heterogeneity of the processing elements arise due to differences in computation speed and memory capacity of the processors. We first consider using a discrete functional performance model that integrates processing speed and capacity of processing elements and then develop a mathematical model and propose a heuristic mapping algorithm for distributing a given total workload of size N on p processing elements such that the total computation time is minimized. Computational results show that the proposed method provides a significant improvement in reducing the computation time in comparison to equal distribution approach.
本文针对异构计算平台上计算任务的高效分配问题进行了研究。由于处理器的计算速度和存储容量的差异,导致了处理元素的异构性。我们首先考虑使用一个离散函数性能模型,该模型集成了处理元素的处理速度和处理能力,然后建立了一个数学模型,并提出了一个启发式映射算法,用于将大小为N的给定总工作量分配到p个处理元素上,从而使总计算时间最小化。计算结果表明,与等分布方法相比,该方法在减少计算时间方面有显著改善。
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引用次数: 1
A Reinforcement Learning assisted Backoff Algorithm for LoRa networks 基于强化学习的LoRa网络退退算法
A. Valkanis, G. Beletsioti, Konstantinos F. Kantelis, Petros Nicopolitidis, Georgios I. Papadimitriou
The Long Range (LoRa) networks are able to provide both long-range coverage and low power consumption for sensing devices. These features make it one of the most attractive solutions for Internet of Things (IoT) applications. The default channel access mechanism used by the protocol is pure ALOHA, which due to its simplicity and lack of synchronization creates scalability problems when the number of supported end devices increases. The slotted ALOHA channel access mechanism has been proposed as an alternative, which through the synchronization of transmissions achieves the improvement of the efficiency and scalability of LoRa networks. One of the most important operating parameters of slotted ALOHA is the backoff algorithm. In this paper we present a novel backoff algorithm assisted by reinforcement learning mechanism, which regulates the offered load on the network by adjusting the congestion window. Simulation results show that the proposed algorithm improves efficiency and energy consumption for the end devices compared to other backoff algorithms from the literature.
远程(LoRa)网络能够为传感设备提供远程覆盖和低功耗。这些特性使其成为物联网(IoT)应用中最具吸引力的解决方案之一。该协议使用的默认通道访问机制是纯ALOHA,由于其简单性和缺乏同步,当支持的终端设备数量增加时,会产生可伸缩性问题。作为一种替代方案,提出了开槽ALOHA通道接入机制,该机制通过传输同步实现LoRa网络的效率和可扩展性的提高。开槽ALOHA最重要的工作参数之一是后退算法。本文提出了一种基于强化学习机制的后退算法,该算法通过调整拥塞窗口来调节网络提供的负载。仿真结果表明,与文献中其他退退算法相比,该算法提高了终端设备的效率和能耗。
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引用次数: 3
An Energy Efficient Hybrid FEC-ARQ Communication Scheme for Small Satellite Applications 一种用于小卫星的节能混合FEC-ARQ通信方案
Oliver Vassallo, Victor Buttigieg, M. Azzopardi
With the extensive cost reductions associated with small satellites, low Earth orbit missions are increasingly becoming popular, mostly with universities and the New-Space industry. However, a persistent limitation associated with the smallest satellites is the significant reduction in energy resources that each satellite has at its disposal. This limitation poses a challenge when using advanced communication systems, particularly those employing advanced forward error correction such as low-density parity check (LDPC) codes. To conserve the high computational energy required to decode such codes, we propose a novel early termination stopping criterion for LDPC decoders that is based on detecting the periodicity of syndrome weight oscillations. The technique is independent of the operating signal-to-noise ratio and results in reductions better than 80%, in the computational energy expended on a well-known bit-flipping decoding algorithm. Real world results are presented using an ARM-based microcontroller.
随着与小卫星相关的成本大幅降低,近地轨道任务越来越受欢迎,主要是在大学和新空间工业中。但是,与最小的卫星有关的一个持久的限制是,每颗卫星可使用的能源资源大大减少。当使用先进的通信系统时,特别是那些采用先进的前向纠错(如低密度奇偶校验(LDPC)码)的通信系统时,这种限制提出了挑战。为了节省解码此类码所需的高计算能量,我们提出了一种新的LDPC解码器早期终止停止准则,该准则基于检测综合征权重振荡的周期性。该技术与操作信噪比无关,在众所周知的比特翻转解码算法上消耗的计算能量降低了80%以上。使用基于arm的微控制器给出了实际结果。
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引用次数: 0
LoRaWAN-aided Waste-to-Energy Concept Model in Smart Cities lorawan辅助下的智慧城市垃圾发电概念模型
Elif Ak, Kıymet Kaya, Y. Yaslan, S. Oktug
With the use of sensor networks and machine learning (ML) techniques in data analysis, the impact of the works for smart cities is getting greater. As a sub-field o f s mart cities, waste management, and related waste transformations study and plan waste collection, disposal, and recycling. Especially, waste to energy transformation composes the major part of waste disposal. Predicting the energy to be obtained from waste and planning the energy supply accordingly depend on estimating the amount of waste and knowing its content. However, energy prediction from solid waste suffers from weak forecasting models, which lead to misguided management strategies in smart cities. Internet of Things (IoT) technologies like low-power, wide-area networking protocol (LoRaWAN) offer new opportunities to collect, monitor, and analyze data in smart cities, including waste management. In this study, we propose the LoRaWAN-aided Waste-to-Energy Concept Model to build the waste-to-energy prediction model with the provided smart city use case using LoRa network as an underlying data collection step. Consequently, we benefit from the pre-trained Gradient Boosting Regression (GBR) model whose process details are provided in our previous study, to predict municipal solid waste using daily data along with other relevant variables such as temperature.
随着传感器网络和机器学习(ML)技术在数据分析中的应用,这些工作对智慧城市的影响越来越大。作为智慧城市的一个子领域,废物管理和相关的废物转化研究和规划废物收集,处置和回收。其中,垃圾能源转化是垃圾处理的重要组成部分。预测从废物中获得的能源,并相应地规划能源供应,取决于对废物数量的估计和废物含量的了解。然而,固体废物的能源预测受到预测模型薄弱的影响,这导致智慧城市的管理策略被误导。低功耗广域网协议(LoRaWAN)等物联网(IoT)技术为智能城市(包括废物管理)的数据收集、监控和分析提供了新的机会。在本研究中,我们提出了lorawan辅助的垃圾焚烧能源概念模型,以提供的智慧城市用例为基础,利用LoRa网络作为底层数据收集步骤,构建垃圾焚烧能源预测模型。因此,我们受益于预先训练的梯度增强回归(GBR)模型,该模型的过程细节在我们之前的研究中提供,使用日常数据以及其他相关变量(如温度)来预测城市固体废物。
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引用次数: 2
Multi-Round Joint Belief Propagation Decoding with Perturbation for JSCC System Based on DP-LDPC Codes 基于DP-LDPC码的JSCC系统多轮联合信念传播摄动译码
W. Lin, Zhiping Xu, Shaohua Hong, Lin Wang
In this paper, a multi-round joint belief propagation (BP) decoding with perturbation algorithm is proposed for joint source-channel coding (JSCC) system based on double protograph low-density parity-check (DP-LDPC) codes to improve decoding performance. In the proposed algorithm, the joint BP decoding is concatenated with cyclic redundancy check (CRC). The reliability of each variable node (VN) is evaluated in the joint BP decoding algorithm, and the CRC is used to check the error which is undetected by the joint BP. When error is detected, re-decoding process with perturbation for the unreliable VN is aroused. The simulation results indicate that the proposed method has a better bit error rate (BER) performance in comparison with the traditional joint BP algorithm.
针对联合信源信道编码(JSCC)系统中基于双原型低密度奇偶校验码(DP-LDPC)的编码,提出了一种基于微扰算法的多轮联合信念传播(BP)译码,以提高译码性能。在该算法中,联合BP解码与循环冗余校验(CRC)相连接。在联合BP解码算法中,对每个可变节点(VN)的可靠性进行评估,并使用CRC对联合BP无法检测到的错误进行检查。当检测到错误时,引起不可靠VN的扰动重解码过程。仿真结果表明,与传统的联合BP算法相比,该方法具有更好的误码率性能。
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引用次数: 0
Machine Learning-based Currency Information Retrieval for Aiding the Visually Impaired People 基于机器学习的视障人士货币信息检索
Kajal Chatterjee, M. Obaidat, D. Samanta, SK Hafizul Islam, Niju P. Joseph
Paper currency is one of the most in-demand and long-established payment modes across the globe. People suffering from visual disabilities often face difficulties while handling paper currencies. Over the years, assisting technology has been rekindling itself to serve the aged and disabled person more aptly. Image processing methods and other sophisticated technologies, like Artificial Intelligence, Deep Learning, etc., can be employed to identify banknotes and fetch other valuable pieces of information from them. This paper proposes a framework that focuses on an integrated approach to retrieving data from the paper currency’s uploaded image. The current version of the framework focuses on identifying the authenticity of the paper currency and classifying it according to its value. This work is an initiative to help visually impaired people to use paper currencies without assistance from other individuals and support them in living independently.
纸币是全球最受欢迎、历史最悠久的支付方式之一。患有视觉障碍的人在处理纸币时经常遇到困难。多年来,辅助科技重新焕发活力,为长者和残疾人士提供更合适的服务。图像处理方法和其他复杂的技术,如人工智能、深度学习等,可以用来识别纸币,并从中获取其他有价值的信息。本文提出了一个框架,该框架侧重于从纸币上传的图像中检索数据的集成方法。当前版本的框架侧重于识别纸币的真实性,并根据其价值对其进行分类。这项工作是一项倡议,旨在帮助视障人士在没有他人帮助的情况下使用纸币,并支持他们独立生活。
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引用次数: 0
V2X Architecture for Autonomous Platoon Management In Urban Environment 城市环境下自主排管理的V2X架构
Naila Bouchemal, Jae-Yun Jun
Platooning shows the potential to increase the efficiency and safety of future road traffic. Many researches illustrate its efficiency in highway scenarios where it is restricted to one lane. However, the biggest challenges lies in urban environments. Indeed, they are characterized by low-speed limits, intersections, traffic lights, buildings, vulnerable users..etc. We propose in this paper an Edge Cloud Vehicle-to-everything (V2X) architecture for full dynamic Platoon management in urban environments. We describe in this paper the overall phases of a Platoon, while considering the Cooperative Adaptive Cruise Control (C-ACC) function and the traffic light intersection.We focused in this paper on two main contributions: First, the V2X exchanges; indeed we created a new type of Intelligent Transportation Systems (ITS) message called ECEmessages based on the Cooperative-ITS (C-ITS) message structure as Cooperative Awareness Message (CAM), Decentralized Environmental Notification Message (DENM), Signal Phase and Timing (SPAT), and Map message (MAP).Then, in order to test the effectiveness of our proposal, we used the Gazebo ROS simulator. We performed the performance evaluations of the proposal by providing a mapping between the importance of the V2X communications, which is measured in terms of latency and reliability, and of the platoon, which is measured in terms of achievable inter-distance between vehicles.
队列驾驶系统显示出提高未来道路交通效率和安全性的潜力。许多研究表明,它的效率在高速公路场景,限制在一个车道。然而,最大的挑战在于城市环境。事实上,它们的特点是低速限制、十字路口、交通灯、建筑物、弱势用户等。我们在本文中提出了一种边缘云车对一切(V2X)架构,用于城市环境中的全动态排管理。本文在考虑协同自适应巡航控制(C-ACC)功能和交通灯交叉口的情况下,描述了一个排的整体阶段。我们在本文中主要关注两个方面的贡献:首先,V2X交换;事实上,我们创建了一种新型的智能交通系统(ITS)信息,称为ECEmessages,基于合作ITS (C-ITS)信息结构,如合作意识信息(CAM)、分散环境通知信息(DENM)、信号相位和定时(SPAT)和地图信息(Map)。然后,为了测试我们的建议的有效性,我们使用了Gazebo ROS模拟器。我们通过提供V2X通信的重要性(以延迟和可靠性为衡量标准)与车队的重要性(以车辆之间可实现的间隔距离为衡量标准)之间的映射,对该提案进行了性能评估。
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引用次数: 0
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2021 International Conference on Computer, Information and Telecommunication Systems (CITS)
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