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Displaying 1-28 out of 28 total
Nearby Friend Alert: Location Anonymity in Mobile Geosocial Networks
Found in: IEEE Pervasive Computing
By Hong Ping Li,Haibo Hu,Jianliang Xu
Issue Date:October 2013
pp. 62-70
Mobile geosocial networking services could be the killer app for next-generation mobile computing. However, the privacy issue--in particular, location privacy--has both users and government authors concerned. The authors address this issue for the "ne...
 
VERDICT: Privacy-preserving authentication of range queries in location-based services
Found in: 2013 IEEE International Conference on Data Engineering (ICDE 2013)
By Haibo Hu,Qian Chen,Jianliang Xu
Issue Date:April 2013
pp. 1312-1315
We demonstrate VERDICT, a location-based range query service featuring the privacy-preserving authentication capability. VERDICT adopts the common data-as-a-service (DaaS) model, which consists of the data owner (a location registry or a mobile operator) w...
 
Processing private queries over untrusted data cloud through privacy homomorphism
Found in: Data Engineering, International Conference on
By Haibo Hu,Jianliang Xu,Chushi Ren,Byron Choi
Issue Date:April 2011
pp. 601-612
Query processing that preserves both the data privacy of the owner and the query privacy of the client is a new research problem. It shows increasing importance as cloud computing drives more businesses to outsource their data and querying services. Howeve...
 
DigestJoin: Exploiting Fast Random Reads for Flash-Based Joins
Found in: Mobile Data Management, IEEE International Conference on
By Yu Li, Sai Tung On, Jianliang Xu, Byron Choi, Haibo Hu
Issue Date:May 2009
pp. 152-161
Flash disks have been an emerging secondary storage media. In particular, there have been portable devices, multimedia players and laptop computers that are configured with no magnetic disks but flash disks.It is envisioned that some RDBMSs will operate on...
 
Lazy-Update B+-Tree for Flash Devices
Found in: Mobile Data Management, IEEE International Conference on
By Sai Tung On, Haibo Hu, Yu Li, Jianliang Xu
Issue Date:May 2009
pp. 323-328
With the rapid increasing capacity of flash chips, flash-aware indexing techniques are highly desirable for flash devices. The unique features of flash memory, such as the erase-before-write constraint and the asymmetric read/write cost, severely deteriora...
 
Non-Exposure Location Anonymity
Found in: Data Engineering, International Conference on
By Haibo Hu, Jianliang Xu
Issue Date:April 2009
pp. 1120-1131
Location cloaking has been proposed and well studied to protect user privacy. It blurs the accurate user location (i.e., a point withcoordinates) and replaces it with a well-shaped cloaked region (usually a circle or a rectangle). However, to obtain such a...
 
iPDA: Supporting Privacy-Preserving Location-Based Mobile Services
Found in: Mobile Data Management, IEEE International Conference on
By Jing Du, Jianliang Xu, Xueyan Tang, Haibo Hu
Issue Date:May 2007
pp. 212-214
No summary available.
 
Range Nearest-Neighbor Query
Found in: IEEE Transactions on Knowledge and Data Engineering
By Haibo Hu, Dik Lun Lee
Issue Date:January 2006
pp. 78-91
A range nearest-neighbor (RNN) query retrieves the nearest neighbor (NN) for every point in a range. It is a natural generalization of point and continuous nearest-neighbor queries and has many applications. In this paper, we consider the ranges as (hyper)...
 
Semantic Location Modeling for Location Navigation in Mobile Environment
Found in: Mobile Data Management, IEEE International Conference on
By Haibo Hu, Dik-Lun Lee
Issue Date:January 2004
pp. 52
<p>Location-based applications require a well-formed representation of spatial knowledge. Current location models can be classified into symbolic or geometric models. The former attempts to represent logical entities and their semantics, but requires...
 
Towards Real-time Parallel Processing of Spatial Queries
Found in: Parallel Processing, International Conference on
By Haibo Hu, Manli Zhu, Dik-Lun Lee
Issue Date:October 2003
pp. 565
Spatial databases are entering an era of mass deployment in various real-life applications, especially mobile and location-based services. The real-time processing of spatial queries to meet different performance goals poses new problems to the real-time a...
 
Security Analysis of Random Phase Encoding Based Image Encryption in Gyrator Transform Domains
Found in: 2013 Ninth International Conference on Computational Intelligence and Security (CIS)
By Jun Sang,Bin Cai,Bing Zhang,Daxiang Hong,Haibo Hu
Issue Date:December 2013
pp. 579-582
Gyrator transform is a new tool for image encryption. In this paper, the security of image encryption based on random phase encoding in gyrator transform domains was analyzed. For image encryption with single random phase encoding and gyrator transform, th...
 
Incremental Maintenance of the Minimum Bisimulation of Cyclic Graphs
Found in: IEEE Transactions on Knowledge and Data Engineering
By Jintian Deng,Byron Choi,Jianliang Xu,Haibo Hu,Sourav S. Bhowmick
Issue Date:November 2013
pp. 2536-2550
There have been numerous recent applications of graph databases (e.g., the Semantic Web, ontology representation, social networks, XML, chemical databases, and biological databases). A fundamental structural index for data graphs, namely minimum bisimulati...
 
Optimizing Nonindexed Join Processing in Flash Storage-Based Systems
Found in: IEEE Transactions on Computers
By Yu Li, Sai Tung On, Jianliang Xu,Byron Choi, Haibo Hu
Issue Date:July 2013
pp. 1417-1431
Flash memory-based disks (or simply flash disks) have been widely used in today's computer systems. With their continuously increasing capacity and dropping price, it is envisioned that some database systems will operate on flash disks in the near future. ...
 
Range-Based Skyline Queries in Mobile Environments
Found in: IEEE Transactions on Knowledge and Data Engineering
By Xin Lin,Jianliang Xu,Haibo Hu
Issue Date:April 2013
pp. 835-849
Skyline query processing for location-based services, which considers both spatial and nonspatial attributes of the objects being queried, has recently received increasing attention. Existing solutions focus on solving point- or line-based skyline queries,...
 
Flag Commit: Supporting Efficient Transaction Recovery in Flash-Based DBMSs
Found in: IEEE Transactions on Knowledge and Data Engineering
By Sai Tung On,Jianliang Xu,Byron Choi,Haibo Hu,Bingsheng He
Issue Date:September 2012
pp. 1624-1639
Owing to recent advances in semiconductor technologies, flash disks have been a competitive alternative to traditional magnetic disks as external storage media. In this paper, we study how transaction recovery can be efficiently supported in database manag...
 
Fractional Order PID Controller Based on Particle Swarm Optimization Implemented with FPGA
Found in: Artificial Intelligence and Computational Intelligence, International Conference on
By Liguo Qu, Haibo Hu, Yourui Huang
Issue Date:October 2010
pp. 165-169
According to parameters adjustment problems of fractional order PID controller applied in time-varying、nonlinear、real-time demanding higher systems, an improved particle swarm optimization (PSO) algorithm is adopted to optimize fractional order PID control...
 
2PASS: Bandwidth-Optimized Location Cloaking for Anonymous Location-Based Services
Found in: IEEE Transactions on Parallel and Distributed Systems
By Haibo Hu, Jianliang Xu
Issue Date:October 2010
pp. 1458-1472
Protection of users' location privacy is a critical issue for location-based services. Location cloaking has been proposed to blur users' accurate locations with cloaked regions. Although various cloaking algorithms have been studied, none of the prior wor...
 
Privacy-Conscious Location-Based Queries in Mobile Environments
Found in: IEEE Transactions on Parallel and Distributed Systems
By Jianliang Xu, Xueyan Tang, Haibo Hu, Jing Du
Issue Date:March 2010
pp. 313-326
In location-based services, users with location-aware mobile devices are able to make queries about their surroundings anywhere and at any time. While this ubiquitous computing paradigm brings great convenience for information access, it also raises concer...
 
PAM: An Efficient and Privacy-Aware Monitoring Framework for Continuously Moving Objects
Found in: IEEE Transactions on Knowledge and Data Engineering
By Haibo Hu, Jianliang Xu, Dik Lun Lee
Issue Date:March 2010
pp. 404-419
Efficiency and privacy are two fundamental issues in moving object monitoring. This paper proposes a privacy-aware monitoring (PAM) framework that addresses both issues. The framework distinguishes itself from the existing work by being the first to holist...
 
Side-Effect Estimation: A Filtering Approach to the View Update Problem
Found in: IEEE Transactions on Knowledge and Data Engineering
By Yun Peng,Byron Choi,Jianliang Xu,Haibo Hu,Sourav S. Bhowmick
Issue Date:September 2014
pp. 1-1
Views and their updates have long been a fundamental technology required in a wide range of applications. However, it has been known that updates through views is a classical intractable problem. In this paper, we propose a novel, data-oriented approach to...
 
Authenticating Location-Based Skyline Queries in Arbitrary Subspaces
Found in: IEEE Transactions on Knowledge and Data Engineering
By Xin Lin,Jianliang Xu,Haibo Hu,Wang-Chien Lee
Issue Date:June 2014
pp. 1-1
With the ever-increasing use of smartphones and tablet devices, location-based services (LBSs) have experienced explosive growth in the past few years. To scale up services, there has been a rising trend of outsourcing data management to Cloud service prov...
 
Private search on key-value stores with hierarchical indexes
Found in: 2014 IEEE 30th International Conference on Data Engineering (ICDE)
By Haibo Hu,Jianliang Xu,Xizhong Xu,Kexin Pei,Byron Choi,Shuigeng Zhou
Issue Date:March 2014
pp. 628-639
Query processing that preserves both the query privacy at the client and the data privacy at the server is a new research problem. It has many practical applications, especially when the queries are about the sensitive attributes of records. However, most ...
   
Report on the third international workshop on cloud datamanagement (CloudDB 2011)
Found in: Proceedings of the 20th ACM international conference on Information and knowledge management (CIKM '11)
By Haibo Hu, Xiaofeng Meng, Zhiming Ding
Issue Date:October 2011
pp. 2637-2638
Managing Interoperability and Complexity in Health Systems, MIXHS'11, aims to be a forum focussing on recent research and technical results in knowledge management and information systems in bio-medical and electronic health systems. The workshop will prov...
     
PCMLogging: reducing transaction logging overhead with PCM
Found in: Proceedings of the 20th ACM international conference on Information and knowledge management (CIKM '11)
By Bingsheng He, Byron Choi, Haibo Hu, Jianliang Xu, Shen Gao
Issue Date:October 2011
pp. 2401-2404
Phase Changing Memory (PCM), as one of the most promising next-generation memory technologies, offers various attractive properties such as non-volatility, bit-alterability, and low idle energy consumption. In this paper, we present PCMLogging, a novel log...
     
Authentication of location-based skyline queries
Found in: Proceedings of the 20th ACM international conference on Information and knowledge management (CIKM '11)
By Haibo Hu, Jianliang Xu, Xin Lin
Issue Date:October 2011
pp. 1583-1588
In outsourced spatial databases, the location-based service (LBS) provides query services to the clients on behalf of the data owner. However, if the LBS is not trustworthy, it may return incorrect or incomplete query results. Thus, authentication is neede...
     
StableBuffer: optimizing write performance for DBMS applications on flash devices
Found in: Proceedings of the 19th ACM international conference on Information and knowledge management (CIKM '10)
By Byron Choi, Haibo Hu, Jianliang Xu, Yu Li
Issue Date:October 2010
pp. 339-348
Flash devices have been widely used in embedded systems, laptop computers, and enterprise servers. However, the poor random writes have been an obstacle to running write-intensive DBMS applications on flash devices. In this paper, we exploit the recently d...
     
Privacy-aware location data publishing
Found in: ACM Transactions on Database Systems (TODS)
By Haibo Hu, Jianliang Xu, Jing Du, Joseph Kee-Yin Ng, Sai Tung On
Issue Date:July 2010
pp. 1-42
This article examines a new problem of k-anonymity with respect to a reference dataset in privacy-aware location data publishing: given a user dataset and a sensitive event dataset, we want to generalize the user dataset such that by joining it with the ev...
     
A generic framework for monitoring continuous spatial queries over moving objects
Found in: Proceedings of the 2005 ACM SIGMOD international conference on Management of data (SIGMOD '05)
By Dik Lun Lee, Haibo Hu, Jianliang Xu
Issue Date:June 2005
pp. 479-490
This paper proposes a generic framework for monitoring continuous spatial queries over moving objects. The framework distinguishes itself from existing work by being the first to address the location update issue and to provide a common interface for monit...
     
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