The 25th Annual International Conference on Mobile Computing and Networking最新文献_第5页

Touch Well Before Use: Intuitive and Secure Authentication for IoT Devices 使用前触摸:物联网设备的直观和安全认证

The 25th Annual International Conference on Mobile Computing and Networking Pub Date : 2019-08-05 DOI: 10.1145/3300061.3345434

Xiaopeng Li, Fengyao Yan, F. Zuo, Qiang Zeng, Lannan Luo

{"title":"Touch Well Before Use: Intuitive and Secure Authentication for IoT Devices","authors":"Xiaopeng Li, Fengyao Yan, F. Zuo, Qiang Zeng, Lannan Luo","doi":"10.1145/3300061.3345434","DOIUrl":"https://doi.org/10.1145/3300061.3345434","url":null,"abstract":"Internet of Things (IoT) are densely deployed in smart environments, such as homes, factories and laboratories, where many people have physical access to IoT devices. How to authenticate users operating on these devices is thus an important problem. IoT devices usually lack conventional user interfaces, such as keyboards and mice, which makes traditional authentication methods inapplicable. We present a virtual sensing technique that allows IoT devices to virtually sense user 'petting' (in the form of some very simple touches for about 2 seconds) on the devices. Based on this technique, we build a secure and intuitive authentication method that authenticates device users by comparing the petting operations sensed by devices and those captured by the user wristband. The authentication method is highly secure as physical operations are required, rather than based on proximity. It is also intuitive, adopting very simple authentication operations, e.g., clicking buttons, twisting rotary knobs, and swiping touchscreens. Unlike the state-of-the-art methods, our method does not require any hardware modifications of devices, and thus can be applied to commercial off-the-shelf (COTS) devices. We build prototypes and evaluate them comprehensively, demonstrating their high effectiveness, security, usability, and efficiency.","PeriodicalId":223523,"journal":{"name":"The 25th Annual International Conference on Mobile Computing and Networking","volume":"325 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-08-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129428900","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 35

OFDMA-Enabled Wi-Fi Backscatter 启用ofdma的Wi-Fi反向散射

The 25th Annual International Conference on Mobile Computing and Networking Pub Date : 2019-08-05 DOI: 10.1145/3300061.3300121

R. Zhao, Fengyuan Zhu, Yuda Feng, Siyu Peng, Xiaohua Tian, Hui Yu, Xinbing Wang

{"title":"OFDMA-Enabled Wi-Fi Backscatter","authors":"R. Zhao, Fengyuan Zhu, Yuda Feng, Siyu Peng, Xiaohua Tian, Hui Yu, Xinbing Wang","doi":"10.1145/3300061.3300121","DOIUrl":"https://doi.org/10.1145/3300061.3300121","url":null,"abstract":"In this paper, we for the first time demonstrate how to enable OFDMA in Wi-Fi backscatter for capacity and concurrency enhancement. With our approach, the excitation signal is reflected, modulated and shifted to lie in the frequency band of the OFDM subcarrier by the tag; OFDMA is realized by coordinating tags to convey information to the receiver with orthogonal subcarriers concurrently through backscatter. The crux of the design is to achieve strict synchronization among communication components, which is more challenging than in regular OFDMA systems due to the more prominent hardware diversity and uncertainty for backscattering. We reveal how the subtle asychnronization scenarios particularly for backscattering can incur system offsets, and present a series of novel designs for the excitation signal transmitter, tag, and receiver to address the issue. We build a prototype in 802.11g OFDM framework to validate our design. Experimental results show that our system can achieve 5.2-16Mbps aggregate throughput by allowing 48 tags to transmit concurrently, which is 1.45-5x capacity and 48x concurrency compared with the existing design respectively. We also design an OFDMA tag IC, and the simulation and numerical analysis results show that the tag's power consumption is in tens of μW.","PeriodicalId":223523,"journal":{"name":"The 25th Annual International Conference on Mobile Computing and Networking","volume":"20 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-08-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128289273","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 61

Optimizing Energy Efficiency of Browsers in Energy-Aware Scheduling-enabled Mobile Devices 在具有能量感知调度功能的移动设备中优化浏览器的能源效率

The 25th Annual International Conference on Mobile Computing and Networking Pub Date : 2019-08-05 DOI: 10.1145/3300061.3345449

Yonghun Choi, Seonghoon Park, H. Cha

{"title":"Optimizing Energy Efficiency of Browsers in Energy-Aware Scheduling-enabled Mobile Devices","authors":"Yonghun Choi, Seonghoon Park, H. Cha","doi":"10.1145/3300061.3345449","DOIUrl":"https://doi.org/10.1145/3300061.3345449","url":null,"abstract":"Web browsing, previously optimized for the desktop environment, is being fine-tuned for energy-efficient use on mobile devices. Although active attempts have been made to reduce energy consumption, the advent of energy-aware scheduling (EAS) integrated in the recent devices suggests the possibility of a new approach for optimizing energy use by browsers. Our preliminary analysis showed that the existing EAS-enabled system is overly optimized for performance, leading to energy inefficiencies while a web browser is running. In this paper, we analyze the characteristics of web browsers, and investigate the cause of energy inefficiency in EAS-enabled mobile devices. We then propose a system, called WebTune, to improve the energy efficiency of mobile browsers. Exploiting the reinforcement learning technique, WebTune learns the optimal execution speed of the web browser's processes, and adjusts the speed at runtime, thus saving energy and ensuring the quality of service (QoS). WebTune is implemented on the latest Android-based smartphones, and evaluated with Alexa's top 200 websites. The experimental results show that WebTune reduced the device-level energy consumption of the Google Pixel 2 XL and Samsung Galaxy S9 Plus smartphones by 18.7-22.0% and 13.7-16.1%, respectively, without degrading the QoS.","PeriodicalId":223523,"journal":{"name":"The 25th Annual International Conference on Mobile Computing and Networking","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-08-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128599922","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 12

Demo: Toward Continuous User Authentication Using PPG in Commodity Wrist-worn Wearables 演示:在商品腕戴式可穿戴设备中使用PPG实现持续用户认证

The 25th Annual International Conference on Mobile Computing and Networking Pub Date : 2019-08-05 DOI: 10.1145/3300061.3343375

Tianming Zhao, Yan Wang, Jian Liu, Yingying Chen

{"title":"Demo: Toward Continuous User Authentication Using PPG in Commodity Wrist-worn Wearables","authors":"Tianming Zhao, Yan Wang, Jian Liu, Yingying Chen","doi":"10.1145/3300061.3343375","DOIUrl":"https://doi.org/10.1145/3300061.3343375","url":null,"abstract":"We present a photoplethysmography (PPG)-based continuous user authentication (CA) system leveraging the pervasively equipped PPG sensor in commodity wrist-worn wearables such as the smartwatch. Compared to existing approaches, our system does not require any users' interactions (e.g., performing specific gestures) and is applicable to practical scenarios where the user's daily activities cause motion artifacts (MA). Notably, we design a robust MA removal method to mitigate the impact of MA. Furthermore, we explore the uniqueness of the human cardiac system and extract the fiducial features in the PPG measurements to train the gradient boosting tree (GBT) classifier, which can effectively differentiate users continuously using low training effort. In particular, we build the prototype of our system using a commodity smartwatch and a WebSocket server running on a laptop for CA. In order to demonstrate the practical use of our system, we will demo our prototype under different scenarios (i.e., static and moving) to show it can effectively detect MA caused by daily activities and achieve a high authentication success rate.","PeriodicalId":223523,"journal":{"name":"The 25th Annual International Conference on Mobile Computing and Networking","volume":"91 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-08-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121052523","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 2

DF-Mose: Device-Free Motion Sensing with Wireless Backscattering DF-Mose:无线后向散射的无设备运动传感

The 25th Annual International Conference on Mobile Computing and Networking Pub Date : 2019-08-05 DOI: 10.1145/3300061.3343374

Ning Xiao, Panlong Yang, Yubo Yan, Hao Zhou, Jiahui Hou, Xiangyang Li

引用次数: 1

Poster: Polarization-based QAM for Visible Light Backscatter Communication 海报:基于偏振的可见光反向散射通信QAM

The 25th Annual International Conference on Mobile Computing and Networking Pub Date : 2019-08-05 DOI: 10.1145/3300061.3343385

Purui Wang, Yue Wu, Chenren Xu

引用次数: 2

Blind Distributed MU-MIMO for IoT Networking over VHF Narrowband Spectrum 基于VHF窄带频谱的物联网盲分布MU-MIMO

The 25th Annual International Conference on Mobile Computing and Networking Pub Date : 2019-08-05 DOI: 10.1145/3300061.3345427

Chuhan Gao, Mehrdad Hessar, Krishna Chintalapudi, B. Priyantha

{"title":"Blind Distributed MU-MIMO for IoT Networking over VHF Narrowband Spectrum","authors":"Chuhan Gao, Mehrdad Hessar, Krishna Chintalapudi, B. Priyantha","doi":"10.1145/3300061.3345427","DOIUrl":"https://doi.org/10.1145/3300061.3345427","url":null,"abstract":"Longer range, in rural/urban IoT networks, allow a large geographical coverage with only a few base-stations, making their deployment and operation economical. In this paper we explore the 150-174 MHz spectrum for long range IoT networks comprising unlicensed MURS and licensed VHF narrowbands. Range in these bands is boosted by the lower RF frequencies as well as higher transmit powers allowed by the FCC. Through a 400 sq km wide area deployment study, we show that, these spectrum bands can provide > 20× the geographical coverage than that in the 900 MHz ISM band LoRa. Increased range translates to greater uplink IoT device traffic. The key contribution of this paper is a novel technique - Blind Distributed MU-MIMO, that allows capacity to scale with the number of antennas (base- stations) while not requiring any coordinated channel measurements between the devices and IoT base- stations. This requirement is crucial since in IoT networks power constrained IoT devices typically sleep and wake up to transmit short messages in response to unpredictable events without any coordination with the base-stations. We demonstrate the efficacy of Blind Distributed MU-MIMO through a real wide area deployment.","PeriodicalId":223523,"journal":{"name":"The 25th Annual International Conference on Mobile Computing and Networking","volume":"16 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-08-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126536640","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 12

S3'19 -- Wireless of the Students, by the Students, and for the Students Workshop S3'19 -学生的无线，由学生，为学生工作室

The 25th Annual International Conference on Mobile Computing and Networking Pub Date : 2019-08-05 DOI: 10.1145/3300061.3355632

Mallesham Dasari, E. Soltanaghaei, Chia-Yi Yeh

引用次数: 0

Learning to Coordinate Video Codec with Transport Protocol for Mobile Video Telephony 学习协调视频编解码器与移动视频电话传输协议

The 25th Annual International Conference on Mobile Computing and Networking Pub Date : 2019-08-05 DOI: 10.1145/3300061.3345430

Anfu Zhou, Huanhuan Zhang, Guangyuan Su, Leilei Wu, Ruoxuan Ma, Zhen Meng, Xinyu Zhang, Xiufeng Xie, Huadong Ma, Xiaojiang Chen

{"title":"Learning to Coordinate Video Codec with Transport Protocol for Mobile Video Telephony","authors":"Anfu Zhou, Huanhuan Zhang, Guangyuan Su, Leilei Wu, Ruoxuan Ma, Zhen Meng, Xinyu Zhang, Xiufeng Xie, Huadong Ma, Xiaojiang Chen","doi":"10.1145/3300061.3345430","DOIUrl":"https://doi.org/10.1145/3300061.3345430","url":null,"abstract":"Despite the pervasive use of real-time video telephony services, the users' quality of experience (QoE) remains unsatisfactory, especially over the mobile Internet. Previous work studied the problem via controlled experiments, while a systematic and in-depth investigation in the wild is still missing. To bridge the gap, we conduct a large-scale measurement campaign on appname, an operational mobile video telephony service. Our measurement logs fine-grained performance metrics over 1 million video call sessions. Our analysis shows that the application-layer video codec and transport-layer protocols remain highly uncoordinated, which represents one major reason for the low QoE. We thus propose name, a machine learning based framework to resolve the issue. Instead of blindly following the transport layer's estimation of network capacity, name reviews historical logs of both layers, and extracts high-level features of codec/network dynamics, based on which it determines the highest bitrates for forthcoming video frames without incurring congestion. To attain the ability, we train name with the aforementioned massive data traces using a custom-designed imitation learning algorithm, which enables name to learn from past experience. We have implemented and incorporated name into appname. Our experiments show that name outperforms state-of-the-art solutions, improving video quality while reducing stalling time by multi-folds under various practical scenarios.","PeriodicalId":223523,"journal":{"name":"The 25th Annual International Conference on Mobile Computing and Networking","volume":"95 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-08-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123583128","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 53

Poster: FlexDP-Flexible Data Plane for ENFV 海报:flexdp -面向ENFV的灵活数据平面

The 25th Annual International Conference on Mobile Computing and Networking Pub Date : 2019-08-05 DOI: 10.1145/3300061.3343382

Amit Samanta, Xinlei Chen, Yong Li

引用次数: 3