Guan-Hua Tu

54 papers A* 14A 3Misc 2Journal 19Unranked 15
YearRankTypeTitle / Venue / Authors
2025 J jnl
CellSecInspector: Safeguarding Cellular Networks via Automated Security Analysis on Specifications.
CoRR
Ke Xie, Xingyi Zhao, Yiwen Hu, Munshi Saifuzzaman, Wen Li, Shuhan Yuan, Tian Xie, Guan-Hua Tu
2025 J jnl
IMS is Not That Secure on Your 5G/4G Phones.
GetMobile Mob. Comput. Commun.
Jingwen Shi, Sihan Wang, Min-Yue Chen, Yiwen Hu, Guan-Hua Tu, Tian Xie, Man-Hsin Chen, Chi-Yu Li, Chunyi Peng
2025 — conf
PDCA: Practical Dynamic Client Association in Wi-Fi Mesh Networks Using Easymesh.
ICC
Yu-Shao Su, Kuan-Lin Chen, Ming-Huang Hsieh, Tzu-Chi Yu, Chi-Yu Li, Guan-Hua Tu
2024 J jnl
Dissecting Operational Cellular IoT Service Security: Attacks and Defenses.
IEEE/ACM Trans. Netw.
Sihan Wang, Tian Xie, Min-Yue Chen, Guan-Hua Tu, Chi-Yu Li, Xinyu Lei, Po-Yi Chou, Fu-Cheng Hsieh, Yiwen Hu, Li Xiao, Chunyi Peng
2024 A* conf
IMS is Not That Secure on Your 5G/4G Phones.
MobiCom
Jingwen Shi, Sihan Wang, Min-Yue Chen, Guan-Hua Tu, Tian Xie, Man-Hsin Chen, Yiwen Hu, Chi-Yu Li, Chunyi Peng
2024 — conf
InstaMAuth: Instant Mobile Authentication Service Based on 5G Authenticated Call Sessions.
DSC
Yi-Chen Hsieh, Tzu-Chi Yu, Chi-Yu Li, Guan-Hua Tu
2024 A* conf
Practical Latency-Aware Scheduling for Low-Latency Elephant VR Flows in Wi-Fi Networks.
PerCom
Shao-Jung Lu, Wei-Xun Chen, Yu-Shao Su, Yu-Shou Chang, Yao-Wen Liu, Chi-Yu Li, Guan-Hua Tu
2024 J jnl
Taming the Insecurity of Cellular Emergency Services (9-1-1): From Vulnerabilities to Secure Designs.
IEEE/ACM Trans. Netw.
Min-Yue Chen, Yiwen Hu, Guan-Hua Tu, Chi-Yu Li, Sihan Wang, Jingwen Shi, Tian Xie, Ren-Chieh Hsu, Li Xiao, Chunyi Peng, Zhaowei Tan, Songwu Lu
2024 A* conf
Uncovering Problematic Designs Hindering Ubiquitous Cellular Emergency Services Access.
MobiCom
Yiwen Hu, Min-Yue Chen, Haitian Yan, Chuan-Yi Cheng, Guan-Hua Tu, Chi-Yu Li, Tian Xie, Chunyi Peng, Li Xiao, Jiliang Tang
2023 — conf
A Runtime Anomaly Detector via Service Communication Proxy for 5G Mobile Networks.
INFOCOM Workshops
Yin-Chi Li, Ping-Tsan Liu, Yi-An Tai, Che-Hung Liu, Man-Hsin Chen, Chi-Yu Li, Guan-Hua Tu
2023 J jnl
Insecurity of Operational IMS Call Systems: Vulnerabilities, Attacks, and Countermeasures.
IEEE/ACM Trans. Netw.
Yu-Han Lu, Sandy Hsin-Yu Hsiao, Chi-Yu Li, Yi-Chen Hsieh, Po-Yi Chou, Yao-yu Li, Tian Xie, Guan-Hua Tu
2023 J jnl
MPKIX: Towards More Accountable and Secure Internet Application Services via Mobile Networked Systems.
IEEE Trans. Mob. Comput.
Tian Xie, Sihan Wang, Xinyu Lei, Jingwen Shi, Guan-Hua Tu, Chi-Yu Li
2023 — conf
Remote Detection of 4G/5G UEs Vulnerable to Stealthy Call DoS.
INFOCOM Workshops
Man-Hsin Chen, Chiung-I Wu, Yin-Chi Li, Chi-Yu Li, Guan-Hua Tu
2023 J jnl
The Security in Optical Wireless Communication: A Survey.
ACM Comput. Surv.
Xiao Zhang, Griffin Klevering, Xinyu Lei, Yiwen Hu, Li Xiao, Guan-Hua Tu
2023 J jnl
Unveiling the Insecurity of Operational Cellular Emergency Services (911): Vulnerabilities, Attacks, and Countermeasures.
GetMobile Mob. Comput. Commun.
Yiwen Hu, Min-Yue Chen, Guan-Hua Tu, Chi-Yu Li, Sihan Wang, Jingwen Shi, Tian Xie, Li Xiao, Chunyi Peng, Zhaowei Tan, Songwu Lu
2023 — conf
When Good Turns Evil: Encrypted 5G/4G Voice Calls Can Leak Your Identities.
CNS
Jingwen Shi, Tian Xie, Guan-Hua Tu, Chunyi Peng, Chi-Yu Li, Andrew Z. Hou, Sihan Wang, Yiwen Hu, Xinyu Lei, Min-Yue Chen, Li Xiao, Xiaoming Liu
2022 A* conf
Uncovering insecure designs of cellular emergency services (911).
MobiCom
Yiwen Hu, Min-Yue Chen, Guan-Hua Tu, Chi-Yu Li, Sihan Wang, Jingwen Shi, Tian Xie, Li Xiao, Chunyi Peng, Zhaowei Tan, Songwu Lu
2022 J jnl
Wi-Fi-Based Tracking of Human Walking for Home Health Monitoring.
IEEE Internet Things J.
Chi-Lun Lin, Wen-Jia Chang, Guan-Hua Tu
2021 — conf
BFastPay: A Routing-free Protocol for Fast Payment in Bitcoin Network.
CODASPY
Xinyu Lei, Guan-Hua Tu, Tian Xie, Sihan Wang
2021 J jnl
How Can IoT Services Pose New Security Threats In Operational Cellular Networks?
IEEE Trans. Mob. Comput.
Tian Xie, Guan-Hua Tu, Chi-Yu Li, Chunyi Peng
2021 A* conf
Insecurity of operational cellular IoT service: new vulnerabilities, attacks, and countermeasures.
MobiCom
Sihan Wang, Guan-Hua Tu, Xinyu Lei, Tian Xie, Chi-Yu Li, Po-Yi Chou, Fu-Cheng Hsieh, Yiwen Hu, Li Xiao, Chunyi Peng
2021 — conf
Security Threats from Bitcoin Wallet Smartphone Applications: Vulnerabilities, Attacks, and Countermeasures.
CODASPY
Yiwen Hu, Sihan Wang, Guan-Hua Tu, Li Xiao, Tian Xie, Xinyu Lei, Chi-Yu Li
2021 J jnl
The Untold Secrets of WiFi-Calling Services: Vulnerabilities, Attacks, and Countermeasures.
IEEE Trans. Mob. Comput.
Tian Xie, Guan-Hua Tu, Bangjie Yin, Chi-Yu Li, Chunyi Peng, Mi Zhang, Hui Liu, Xiaoming Liu
2020 A conf
An Inter-blockchain Escrow Approach for Fast Bitcoin Payment.
ICDCS
Xinyu Lei, Tian Xie, Guan-Hua Tu, Alex X. Liu
2020 — conf
Fast and Secure kNN Query Processing in Cloud Computing.
CNS
Xinyu Lei, Guan-Hua Tu, Alex X. Liu, Tian Xie
2020 A* conf
Ghost calls from operational 4G call systems: IMS vulnerability, call DoS attack, and countermeasure.
MobiCom
Yu-Han Lu, Chi-Yu Li, Yao-yu Li, Sandy Hsin-Yu Hsiao, Tian Xie, Guan-Hua Tu, Wei-Xun Chen
2020 A conf
SecWIR: securing smart home IoT communications via wi-fi routers with embedded intelligence.
MobiSys
Xinyu Lei, Guan-Hua Tu, Chi-Yu Li, Tian Xie, Mi Zhang
2019 — conf
Exploring the Insecurity of Google Account Registration Protocol via Model Checking.
SSCI
Tian Xie, Sihan Wang, Guan-Hua Tu, Chi-Yu Li, Xinyu Lei
2019 A* conf
SecEQP: A Secure and Efficient Scheme for SkNN Query Problem Over Encrypted Geodata on Cloud.
ICDE
Xinyu Lei, Alex X. Liu, Rui Li, Guan-Hua Tu
2018 J jnl
Device-Customized Multi-Carrier Network Access on Commodity Smartphones.
IEEE/ACM Trans. Netw.
Yuanjie Li, Chunyi Peng, Haotian Deng, Zengwen Yuan, Guan-Hua Tu, Jiayao Li, Songwu Lu, Xi Li
2018 — conf
How Voice Service Threatens Cellular-Connected IoT Devices in the Operational 4G LTE Networks.
ICC
Tian Xie, Chi-Yu Li, Jiliang Tang, Guan-Hua Tu
2018 — conf
Mobile Edge Computing Platform Deployment in 4G LTE Networks: A Middlebox Approach.
HotEdge
Chi-Yu Li, Hsueh-Yang Liu, Po-Hao Huang, Hsu-Tung Chien, Guan-Hua Tu, Pei-Yuan Hong, Ying-Dar Lin
2018 — conf
The Dark Side of Operational Wi-Fi Calling Services.
CNS
Tian Xie, Guan-Hua Tu, Chi-Yu Li, Chunyi Peng, Jiawei Li, Mi Zhang
2018 — conf
The Insecurity of Home Digital Voice Assistants - Vulnerabilities, Attacks and Countermeasures.
CNS
Xinyu Lei, Guan-Hua Tu, Alex X. Liu, Chi-Yu Li, Tian Xie
2018 J jnl
The Untold Secrets of Operational Wi-Fi Calling Services: Vulnerabilities, Attacks, and Countermeasures.
CoRR
Tian Xie, Guan-Hua Tu, Bangjie Yin, Chi-Yu Li, Chunyi Peng, Mi Zhang, Hui Liu, Xiaoming Liu
2018 — conf
V2PSense: Enabling Cellular-Based V2P Collision Warning Service through Mobile Sensing.
ICC
Chi-Yu Li, Giovanni Salinas, Po-Hao Huang, Guan-Hua Tu, Guo-Huang Hsu, Tien-Yuan Hsieh
2017 J jnl
The Insecurity of Home Digital Voice Assistants - Amazon Alexa as a Case Study.
CoRR
Xinyu Lei, Guan-Hua Tu, Alex X. Liu, Chi-Yu Li, Tian Xie
2016 J jnl
Detecting Problematic Control-Plane Protocol Interactions in Mobile Networks.
IEEE/ACM Trans. Netw.
Guan-Hua Tu, Yuanjie Li, Chunyi Peng, Chi-Yu Li, Songwu Lu
2016 A* conf
New Security Threats Caused by IMS-based SMS Service in 4G LTE Networks.
CCS
Guan-Hua Tu, Chi-Yu Li, Chunyi Peng, Yuanjie Li, Songwu Lu
2016 Misc conf
VoLTE*: A Lightweight Voice Solution to 4G LTE Networks.
HotMobile
Guan-Hua Tu, Chi-Yu Li, Chunyi Peng, Zengwen Yuan, Yuanjie Li, Xiaohu Zhao, Songwu Lu
2016 Misc conf
iCellular: Device-Customized Cellular Network Access on Commodity Smartphones.
NSDI
Yuanjie Li, Haotian Deng, Chunyi Peng, Zengwen Yuan, Guan-Hua Tu, Jiayao Li, Songwu Lu
2015 — —
Control-Plane Protocol Interactions in Mobile Networks.
Guan-Hua Tu
2015 — conf
How voice call technology poses security threats in 4G LTE networks.
CNS
Guan-Hua Tu, Chi-Yu Li, Chunyi Peng, Songwu Lu
2015 A* conf
Insecurity of Voice Solution VoLTE in LTE Mobile Networks.
CCS
Chi-Yu Li, Guan-Hua Tu, Chunyi Peng, Zengwen Yuan, Yuanjie Li, Songwu Lu, Xinbing Wang
2015 J jnl
New Threats to SMS-Assisted Mobile Internet Services from 4G LTE Networks.
CoRR
Guan-Hua Tu, Yuanjie Li, Chunyi Peng, Chi-Yu Li, Muhammad Taqi Raza, Hsiao-Yun Tseng, Songwu Lu
2015 J jnl
iCellular: Define Your Own Cellular Network Access on Commodity Smartphones.
CoRR
Yuanjie Li, Haotian Deng, Chunyi Peng, Guan-Hua Tu, Jiayao Li, Zengwen Yuan, Songwu Lu
2014 A* conf
Control-plane protocol interactions in cellular networks.
SIGCOMM
Guan-Hua Tu, Yuanjie Li, Chunyi Peng, Chi-Yu Li, Hongyi Wang, Songwu Lu
2014 A* conf
Real Threats to Your Data Bills: Security Loopholes and Defenses in Mobile Data Charging.
CCS
Chunyi Peng, Chi-Yu Li, Hongyi Wang, Guan-Hua Tu, Songwu Lu
2013 A conf
Accounting for roaming users on mobile data access: issues and root causes.
MobiSys
Guan-Hua Tu, Chunyi Peng, Chi-Yu Li, Xingyu Ma, Hongqi Wang, Tao Wang, Songwu Lu
2013 A* conf
How voice calls affect data in operational LTE networks.
MobiCom
Guan-Hua Tu, Chunyi Peng, Hongqi Wang, Chi-Yu Li, Songwu Lu
2012 A* conf
Can we pay for what we get in 3G data access?
MobiCom
Chunyi Peng, Guan-Hua Tu, Chi-Yu Li, Songwu Lu
2012 A* conf
Mobile data charging: new attacks and countermeasures.
CCS
Chunyi Peng, Chi-Yu Li, Guan-Hua Tu, Songwu Lu, Lixia Zhang
2006 J jnl
An Improved GGSN Failure Restoration Mechanism for UMTS.
Wirel. Networks
Phone Lin, Guan-Hua Tu
2005 J jnl
An intelligent GGSN dispatching mechanism for UMTS.
Comput. Commun.
Shin-Ming Cheng, Phone Lin, Guan-Hua Tu, Li-Chen Fu, Ching-Feng Liang