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National Tsing Hua University
(33 results)-
White Papers
A Real-Time Intrusion Detection System Using Data Mining Technique
August 28, 2008, 12:00am PDT
Presently, most computers authenticate user ID and password before users can login these systems. However, danger soon comes if the two items are known to hackers. This paper, proposes a system,...
Provided by National Tsing Hua University
-
White Papers
Using Adaptive Bandwidth Allocation Approach to Defend DDoS Attacks
October 1, 2008, 12:00am PDT
Denial of service attacks occur when the attacks are from a single host, whereas distributed denial of service attacks occur when multiple affected systems flood the bandwidth or resources of a...
Provided by National Tsing Hua University
-
White Papers
Fault-Tolerant and Reliable Computation in Cloud Computing
August 25, 2010, 12:00am PDT
Cloud computing, with its great potentials in low cost and on-demand services, is a promising computing platform for both commercial and non-commercial computation clients. In this work, the...
Provided by National Tsing Hua University
-
White Papers
Comments on Two Multi-Server Authentication Protocols
January 1, 2011, 12:00am PST
Recently, Tsai and Liao et al. each proposed a multi-server authentication protocol. They claimed their protocols are secure and can withstand various attacks. But the authors found some security...
Provided by National Tsing Hua University
-
White Papers
On the Security of Chien's Ultralightweight RFID Authentication Protocol
February 25, 2008, 12:00am PST
RFID systems will soon be widely deployed. Currently, they are not secure enough, and hence researchers have proposed various solutions as introduced by Chien in. Chien classified these protocols...
Provided by National Tsing Hua University
-
White Papers
A Privacy-Flexible Password Authentication Scheme for Multi-Server Environment
July 12, 2010, 12:00am PDT
Since Kerberos suffers from KDC (Key Distribution Center) compromise and impersonation attack, a multi-server password authentication protocol which highlights no verification table in the server...
Provided by National Tsing Hua University
-
White Papers
Comments on Five Smart Card Based Password Authentication Protocols
March 19, 2010, 12:00am PDT
Smart card based password authentication protocols are widely adopted for logging into the remote servers. The protocols can provide mutual authentication between the client and the server over an...
Provided by National Tsing Hua University
-
White Papers
Asymptotic Spectral Distribution of Crosscorrelation Matrix in Asynchronous CDMA
October 6, 2008, 12:00am PDT
Asymptotic Spectral Distribution (ASD) of the crosscorrelation matrix is investigated for a random spreading short/long-code asynchronous Direct Sequence-Code Division Multiple Access (DS-CDMA)...
Provided by National Tsing Hua University
-
White Papers
Identifying Large-Scale RFID Tags Using Non-Cryptographic Approach
April 11, 2011, 12:00am PDT
In this paper, the authors propose a new approach to identify a tag of a RFID system in constant time while keeping untraceability to the tag. The scheme does not use any cryptographic primitives....
Provided by National Tsing Hua University
-
White Papers
A Novel k-out-of-n Oblivious Transfer Protocol from Bilinear Pairing
January 1, 2011, 12:00am PST
As traditional oblivious transfer protocols are treated as cryptographic primitives in most cases, they are usually executed without the consideration of possible attacks, e.g., impersonation,...
Provided by National Tsing Hua University
-
White Papers
A Novel Non-Interactive Deniable Authentication Protocol With Designated Verifier on Elliptic Curve Cryptosystem
October 27, 2010, 12:00am PDT
Recently, many Non-Interactive Deniable Authentication (NIDA) protocols have been proposed. They are mainly composed of two types, signature-based and shared-secrecy based. After reviewing these...
Provided by National Tsing Hua University
-
White Papers
Improvements on Two Password-Based Authentication Protocols
November 17, 2009, 12:00am PST
Recently, Liao et al. and Hölbl et al. each proposed a user authentication protocol, respectively. Both claimed that their schemes can withstand various attacks. However, Xiang et al. pointed out...
Provided by National Tsing Hua University
-
White Papers
An Efficient Secure Oblivious Transfer
October 10, 2009, 12:00am PDT
As traditional oblivious transfer protocols are treated as a cryptographic primitive, they are usually executed without the consideration of possible attacks, e.g., impersonation, replaying, and...
Provided by National Tsing Hua University
-
White Papers
A Novel Multi-Server Authentication Protocol
April 21, 2009, 12:00am PDT
Recently, Tsai and Hsiang et al. each proposed a multi-server authentication protocol. They claimed their protocols are secure and can withstand various attacks. However, after the analysis, the...
Provided by National Tsing Hua University
-
White Papers
A Sub-Pixel Image Registration Technique With Applications to Defect Detection
June 17, 2009, 12:00am PDT
This paper presents a useful sub-pixel image registration method using line segments and a sub-pixel edge detector. In this approach, straight line segments are first extracted from gray images at...
Provided by National Tsing Hua University
-
White Papers
Ramsey Fiscal Policy And Endogenous Growth: A Comment
September 20, 2010, 12:00am PDT
Recently, Park (2009, Economic Theory 39, 377 - 398) extended the Barro endogenous growth model (1990) by assuming that tax rate is optimally chosen by the government and labor supply is elastic....
Provided by National Tsing Hua University
-
Whitepapers
Coverage-Extended Cooperative Geographic Routing With Optimal Power Allocation for Wireless Multihop Networks
July 17, 2012, 12:00am PDT
Cooperative geographic routing has emerged as an efficient, scalable routing paradigm that exploits the joint merit of cooperative diversity and position-aided localized operation to enhance the...
Provided by National Tsing Hua University
-
Whitepapers
TGMD: A Trajectory-Based Group Message Delivery Protocol for Vehicular Ad Hoc Networks
May 24, 2012, 12:00am PDT
Infrastructure-To-Vehicle (I2V) group message delivery is a common operation required by a wide variety of Vehicular Ad hoc NETwork (VANET) applications. However, due to the highly dynamic...
Provided by National Tsing Hua University
-
Whitepapers
Pushing Uplink Goodput of an Asymmetric Access Network Beyond Its Uplink Bandwidth
May 24, 2012, 12:00am PDT
Asymmetric access networks with downlink bandwidth 10 - 1000 times higher than uplink bandwidth are common, and upgrading these links may not be economically feasible in many usage scenarios. In...
Provided by National Tsing Hua University
-
Whitepapers
Flooding-Assisted Informed Dynamic Scheduling for Rateless Codes
March 12, 2012, 12:00am PDT
As part of the tradeoff between error performance, decoding complexity and the overhead of rate-less codes, the combination of Incremental Decoding (ID) and Informed Dynamic Scheduling (IDS),...
Provided by National Tsing Hua University
-
Whitepapers
Throughput Maximization for Cognitive Radio Networks With Wideband Spectrum Sensing
March 12, 2012, 12:00am PDT
Spectrum sensing is an important issue in Cognitive Radio (CR) networks. In a periodic sensing frame structure, the spectrum sensing performance and the protection to the primary network improves...
Provided by National Tsing Hua University
-
Whitepapers
Linear Precoding and Power Allocation Optimization With Partial CSI Under Per BS Power Constraints for Cooperative MIMO TDD Systems
November 21, 2012, 12:00am PST
In downlink, multicell cooperation is a powerful method to mitigate intercell interference and to increase transmit diversity. The cooperation can especially improve the Bit Error Rate (BER)...
Provided by National Tsing Hua University
-
Whitepapers
Efficient Authentication and Key Agreement Procedure in IP Multimedia Subsystem for UMTS
February 1, 2012, 12:00am PST
In a Universal Mobile Telecommunications System (UMTS), a User Equipment (UE) can access IP multimedia services through IP Multimedia Subsystems (IMS). In addition to passing IMS authentication,...
Provided by National Tsing Hua University
-
Whitepapers
A New Data Hiding Scheme Based on DNA Sequence
January 1, 2012, 12:00am PST
A new DNA sequence-based data-hiding scheme is presented in this paper. The authors establish an injective mapping between one complementary rule and two secret bits in a message. Based on this...
Provided by National Tsing Hua University
-
Whitepapers
New Convolutive-Error-Measure and Minimum Total-Model-Order Determination Algorithm for Equalization in Communications
October 27, 2009, 12:00am PDT
Model order determination is a fundamental problem in a wide variety of signal processing and telecommunication applications, such as linear predictive coding of speech signal, image segmentation...
Provided by National Tsing Hua University
-
Whitepapers
An Optimized Joint Time Synchronization and Channel Estimation Scheme for OFDM Systems
April 15, 2008, 12:00am PDT
In this paper, the authors propose a new joint time synchronization and channel estimation scheme based on a conventional training sequence. The training sequence is composed of a maximal length...
Provided by National Tsing Hua University
-
Whitepapers
Probabilistic SINR Constrained Robust Transmit Beamforming: A Bernstein-Type Inequality Based Conservative Approach
February 18, 2011, 12:00am PST
Recently, robust transmit beamforming has drawn considerable attention because it can provide guaranteed receiver performance in the presence of channel state information (CSI) errors. Assuming...
Provided by National Tsing Hua University
-
White Papers
Design and Implementation of RFID-Based Object Locator
November 1, 2007, 12:00am PDT
An object locator is a device designed to assist its user in finding misplaced household and personal objects in a home. This paper describes alternative designs and a proof-of-concept prototype...
Provided by National Tsing Hua University
-
White Papers
A Cross-Layer Design Based on Geographic Information for Cooperative Wireless Networks
July 28, 2010, 12:00am PDT
Most of geographic routing approaches in wireless ad hoc and sensor networks do not take into consideration the Medium Access Control (MAC) and physical layers when designing a routing protocol....
Provided by National Tsing Hua University
-
White Papers
Cooperative Localization With Pre-Knowledge Using Bayesian Network for Wireless Sensor Networks
September 16, 2007, 12:00am PDT
Obtaining location information by localization schemes for sensor nodes makes applications of Wireless Sensor Networks (WSNs) more meaningful. Most of localization schemes only use the information...
Provided by National Tsing Hua University
-
Whitepapers
Routing With Hexagonal Virtual Coordinates in Wireless Sensor Networks
September 1, 2009, 12:00am PDT
Using geographic routing, like GPSR, is efficient for ad hoc and wireless sensor networks, but it requires that nodes be aware of their physical positions. However, if there are holes in the...
Provided by National Tsing Hua University
-
Whitepapers
Distributed Transmission Power Control Algorithm for Wireless Sensor Networks
April 10, 2008, 12:00am PDT
In this paper, the authors propose a distributed transmission power control algorithm which cannot only prolong the lifetime of sensor nodes by saving the energy consumption but enhance the...
Provided by National Tsing Hua University
-
Whitepapers
Ontology Application to Question Generation in E-Learning Systems in Mobile Industry
April 20, 2012, 12:00am PDT
Due to the rapid development of information technologies in recent years, the application of information systems and the spread of networks gradually change the life style of people today. It also...
Provided by National Tsing Hua University
-
Whitepapers
Probabilistic SINR Constrained Robust Transmit Beamforming: A Bernstein-Type Inequality Based Conservative Approach
February 18, 2011, 12:00am PST
Recently, robust transmit beamforming has drawn considerable attention because it can provide guaranteed receiver performance in the presence of channel state information (CSI) errors. Assuming...
Provided by National Tsing Hua University
-
Whitepapers
An Optimized Joint Time Synchronization and Channel Estimation Scheme for OFDM Systems
April 15, 2008, 12:00am PDT
In this paper, the authors propose a new joint time synchronization and channel estimation scheme based on a conventional training sequence. The training sequence is composed of a maximal length...
Provided by National Tsing Hua University
-
Whitepapers
New Convolutive-Error-Measure and Minimum Total-Model-Order Determination Algorithm for Equalization in Communications
October 27, 2009, 12:00am PDT
Model order determination is a fundamental problem in a wide variety of signal processing and telecommunication applications, such as linear predictive coding of speech signal, image segmentation...
Provided by National Tsing Hua University
-
Whitepapers
A New Data Hiding Scheme Based on DNA Sequence
January 1, 2012, 12:00am PST
A new DNA sequence-based data-hiding scheme is presented in this paper. The authors establish an injective mapping between one complementary rule and two secret bits in a message. Based on this...
Provided by National Tsing Hua University
-
Whitepapers
Efficient Authentication and Key Agreement Procedure in IP Multimedia Subsystem for UMTS
February 1, 2012, 12:00am PST
In a Universal Mobile Telecommunications System (UMTS), a User Equipment (UE) can access IP multimedia services through IP Multimedia Subsystems (IMS). In addition to passing IMS authentication,...
Provided by National Tsing Hua University
-
Whitepapers
Linear Precoding and Power Allocation Optimization With Partial CSI Under Per BS Power Constraints for Cooperative MIMO TDD Systems
November 21, 2012, 12:00am PST
In downlink, multicell cooperation is a powerful method to mitigate intercell interference and to increase transmit diversity. The cooperation can especially improve the Bit Error Rate (BER)...
Provided by National Tsing Hua University
-
Whitepapers
Throughput Maximization for Cognitive Radio Networks With Wideband Spectrum Sensing
March 12, 2012, 12:00am PDT
Spectrum sensing is an important issue in Cognitive Radio (CR) networks. In a periodic sensing frame structure, the spectrum sensing performance and the protection to the primary network improves...
Provided by National Tsing Hua University
-
Whitepapers
Flooding-Assisted Informed Dynamic Scheduling for Rateless Codes
March 12, 2012, 12:00am PDT
As part of the tradeoff between error performance, decoding complexity and the overhead of rate-less codes, the combination of Incremental Decoding (ID) and Informed Dynamic Scheduling (IDS),...
Provided by National Tsing Hua University
-
Whitepapers
Pushing Uplink Goodput of an Asymmetric Access Network Beyond Its Uplink Bandwidth
May 24, 2012, 12:00am PDT
Asymmetric access networks with downlink bandwidth 10 - 1000 times higher than uplink bandwidth are common, and upgrading these links may not be economically feasible in many usage scenarios. In...
Provided by National Tsing Hua University
-
Whitepapers
TGMD: A Trajectory-Based Group Message Delivery Protocol for Vehicular Ad Hoc Networks
May 24, 2012, 12:00am PDT
Infrastructure-To-Vehicle (I2V) group message delivery is a common operation required by a wide variety of Vehicular Ad hoc NETwork (VANET) applications. However, due to the highly dynamic...
Provided by National Tsing Hua University
-
Whitepapers
Coverage-Extended Cooperative Geographic Routing With Optimal Power Allocation for Wireless Multihop Networks
July 17, 2012, 12:00am PDT
Cooperative geographic routing has emerged as an efficient, scalable routing paradigm that exploits the joint merit of cooperative diversity and position-aided localized operation to enhance the...
Provided by National Tsing Hua University
-
Whitepapers
Ontology Application to Question Generation in E-Learning Systems in Mobile Industry
April 20, 2012, 12:00am PDT
Due to the rapid development of information technologies in recent years, the application of information systems and the spread of networks gradually change the life style of people today. It also...
Provided by National Tsing Hua University
-
Whitepapers
Distributed Transmission Power Control Algorithm for Wireless Sensor Networks
April 10, 2008, 12:00am PDT
In this paper, the authors propose a distributed transmission power control algorithm which cannot only prolong the lifetime of sensor nodes by saving the energy consumption but enhance the...
Provided by National Tsing Hua University
-
Whitepapers
Routing With Hexagonal Virtual Coordinates in Wireless Sensor Networks
September 1, 2009, 12:00am PDT
Using geographic routing, like GPSR, is efficient for ad hoc and wireless sensor networks, but it requires that nodes be aware of their physical positions. However, if there are holes in the...
Provided by National Tsing Hua University
-
White Papers
Cooperative Localization With Pre-Knowledge Using Bayesian Network for Wireless Sensor Networks
September 16, 2007, 12:00am PDT
Obtaining location information by localization schemes for sensor nodes makes applications of Wireless Sensor Networks (WSNs) more meaningful. Most of localization schemes only use the information...
Provided by National Tsing Hua University
-
White Papers
A Cross-Layer Design Based on Geographic Information for Cooperative Wireless Networks
July 28, 2010, 12:00am PDT
Most of geographic routing approaches in wireless ad hoc and sensor networks do not take into consideration the Medium Access Control (MAC) and physical layers when designing a routing protocol....
Provided by National Tsing Hua University
-
White Papers
Design and Implementation of RFID-Based Object Locator
November 1, 2007, 12:00am PDT
An object locator is a device designed to assist its user in finding misplaced household and personal objects in a home. This paper describes alternative designs and a proof-of-concept prototype...
Provided by National Tsing Hua University
-
White Papers
Ramsey Fiscal Policy And Endogenous Growth: A Comment
September 20, 2010, 12:00am PDT
Recently, Park (2009, Economic Theory 39, 377 - 398) extended the Barro endogenous growth model (1990) by assuming that tax rate is optimally chosen by the government and labor supply is elastic....
Provided by National Tsing Hua University
-
White Papers
A Sub-Pixel Image Registration Technique With Applications to Defect Detection
June 17, 2009, 12:00am PDT
This paper presents a useful sub-pixel image registration method using line segments and a sub-pixel edge detector. In this approach, straight line segments are first extracted from gray images at...
Provided by National Tsing Hua University
-
White Papers
A Novel Multi-Server Authentication Protocol
April 21, 2009, 12:00am PDT
Recently, Tsai and Hsiang et al. each proposed a multi-server authentication protocol. They claimed their protocols are secure and can withstand various attacks. However, after the analysis, the...
Provided by National Tsing Hua University
-
White Papers
An Efficient Secure Oblivious Transfer
October 10, 2009, 12:00am PDT
As traditional oblivious transfer protocols are treated as a cryptographic primitive, they are usually executed without the consideration of possible attacks, e.g., impersonation, replaying, and...
Provided by National Tsing Hua University
-
White Papers
Improvements on Two Password-Based Authentication Protocols
November 17, 2009, 12:00am PST
Recently, Liao et al. and Hölbl et al. each proposed a user authentication protocol, respectively. Both claimed that their schemes can withstand various attacks. However, Xiang et al. pointed out...
Provided by National Tsing Hua University
-
White Papers
A Novel Non-Interactive Deniable Authentication Protocol With Designated Verifier on Elliptic Curve Cryptosystem
October 27, 2010, 12:00am PDT
Recently, many Non-Interactive Deniable Authentication (NIDA) protocols have been proposed. They are mainly composed of two types, signature-based and shared-secrecy based. After reviewing these...
Provided by National Tsing Hua University
-
White Papers
A Novel k-out-of-n Oblivious Transfer Protocol from Bilinear Pairing
January 1, 2011, 12:00am PST
As traditional oblivious transfer protocols are treated as cryptographic primitives in most cases, they are usually executed without the consideration of possible attacks, e.g., impersonation,...
Provided by National Tsing Hua University
-
White Papers
Identifying Large-Scale RFID Tags Using Non-Cryptographic Approach
April 11, 2011, 12:00am PDT
In this paper, the authors propose a new approach to identify a tag of a RFID system in constant time while keeping untraceability to the tag. The scheme does not use any cryptographic primitives....
Provided by National Tsing Hua University
-
White Papers
Asymptotic Spectral Distribution of Crosscorrelation Matrix in Asynchronous CDMA
October 6, 2008, 12:00am PDT
Asymptotic Spectral Distribution (ASD) of the crosscorrelation matrix is investigated for a random spreading short/long-code asynchronous Direct Sequence-Code Division Multiple Access (DS-CDMA)...
Provided by National Tsing Hua University
-
White Papers
Comments on Five Smart Card Based Password Authentication Protocols
March 19, 2010, 12:00am PDT
Smart card based password authentication protocols are widely adopted for logging into the remote servers. The protocols can provide mutual authentication between the client and the server over an...
Provided by National Tsing Hua University
-
White Papers
A Privacy-Flexible Password Authentication Scheme for Multi-Server Environment
July 12, 2010, 12:00am PDT
Since Kerberos suffers from KDC (Key Distribution Center) compromise and impersonation attack, a multi-server password authentication protocol which highlights no verification table in the server...
Provided by National Tsing Hua University
-
White Papers
On the Security of Chien's Ultralightweight RFID Authentication Protocol
February 25, 2008, 12:00am PST
RFID systems will soon be widely deployed. Currently, they are not secure enough, and hence researchers have proposed various solutions as introduced by Chien in. Chien classified these protocols...
Provided by National Tsing Hua University
-
White Papers
Comments on Two Multi-Server Authentication Protocols
January 1, 2011, 12:00am PST
Recently, Tsai and Liao et al. each proposed a multi-server authentication protocol. They claimed their protocols are secure and can withstand various attacks. But the authors found some security...
Provided by National Tsing Hua University
-
White Papers
Fault-Tolerant and Reliable Computation in Cloud Computing
August 25, 2010, 12:00am PDT
Cloud computing, with its great potentials in low cost and on-demand services, is a promising computing platform for both commercial and non-commercial computation clients. In this work, the...
Provided by National Tsing Hua University
-
White Papers
Using Adaptive Bandwidth Allocation Approach to Defend DDoS Attacks
October 1, 2008, 12:00am PDT
Denial of service attacks occur when the attacks are from a single host, whereas distributed denial of service attacks occur when multiple affected systems flood the bandwidth or resources of a...
Provided by National Tsing Hua University
-
White Papers
A Real-Time Intrusion Detection System Using Data Mining Technique
August 28, 2008, 12:00am PDT
Presently, most computers authenticate user ID and password before users can login these systems. However, danger soon comes if the two items are known to hackers. This paper, proposes a system,...
Provided by National Tsing Hua University
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