Search results for: Wanyu Zang

Items from 1 to 15 out of 15 results

article

Extraction and Analysis of the Characteristic Parameters in Back‐to‐Back Connected Asymmetric Schottky Diode

Zuo Wang, Wanyu Zang, Yeming Shi, Xingyu Zhu, more

physica status solidi (a) > 217 > 8 > n/a - n/a

The physical Schottky parameters of devices based on Schottky contact are important to analyze the working mechanism. This article theoretically studies the parameter characteristics of the current–voltage curve of two back‐to‐back connected Schottky contacts via the thermionic emission model, and it is found that not all the parameters are able to be extracted under some constraints. Compared with...

chapter

A Dead-Lock Free Self-healing Algorithm for Distributed Transactional Processes

Wanyu Zang, Meng Yu

Lecture Notes in Computer Science > Information Systems Security > Threat Analysis, Detection and Recovery > 289-302

Even though self-healing techniques for transactional processes have attracted enough attention in recent years, several critical issues regarding the distributed systems have not been addressed. For example, if we do the recovery under sustained attacks, in which condition the recovery can terminate? Is a synchronized clock necessary for distributed recovery? In this paper, we proposed a dead-lock...

book

Security in Emerging Wireless Communication and Networking Systems

Qijun Gu, Wanyu Zang, Meng Yu

Lecture Notes of the Institute for Computer Sciences, Social Informatics and Telecommunications Engineering

This book constitutes the proceedings of the First International ICST Workshop, SEWCN 2009, held in Athens, Greece, in September 2009. The workshop emphasizes on new ideas for secure architectures and protocols to enhance the emerging wireless systems. The 7 selected full papers cover topics on applied cryptography, key management, vulnerability analysis, privacy, authentication, and intrusion detection...

article

Energy efficient approximate self-adaptive data collection in wireless sensor networks

Bin Wang, Xiaochun Yang, Guoren Wang, Ge Yu, more

Frontiers of Computer Science > 2016 > 10 > 5 > 936-950

To extend the lifetime of wireless sensor networks, reducing and balancing energy consumptions are main concerns in data collection due to the power constrains of the sensor nodes. Unfortunately, the existing data collection schemesmainly focus on energy saving but overlook balancing the energy consumption of the sensor nodes. In addition, most of them assume that each sensor has a global knowledge...

chapter

AppGuard: A hardware virtualization based approach on protecting user applications from untrusted commodity operating system

Zili Zha, Min Li, Wanyu Zang, Meng Yu, more

2015 International Conference on Computing, Networking and Communications (ICNC) > 685 - 689

2015 International Conference on Computing, Networking and Communications (ICNC)

The security of user applications largely relies on the proper execution of the underlying operating system. However, existing commodity OSes are inevitably vulnerable due to their enormous code base containing a whole bunch of bugs that can be easily exploited by attackers. In such situations, a proper way of protecting users' data privacy and integrity at runtime is a paramount task that needs efficient...

article

Exploiting and defending trust models in cooperative spectrum sensing

David S Jackson, Wanyu Zang, Qijun Gu, Wei Cheng, more

EURASIP Journal on Wireless Communications and Networking > 2015 > 2015 > 1 > 1-18

Cognitive radios are currently presented as the solution to the ever-increasing spectrum shortage problem. However, their increased capabilities over traditional radios introduce a new dimension of security threats. Cooperative spectrum sensing (CSS) has been proposed as a means to protect cognitive radio networks from the well-known security threats: primary user emulation (PUE) and spectrum sensing...

article

Risk balance defense approach against intrusions for network server

Chengpo Mu, Meng Yu, Yingjiu Li, Wanyu Zang

International Journal of Information Security > 2014 > 13 > 3 > 255-269

The paper presents a new defense approach based on risk balance to protect network servers from intrusion activities. We construct and implement a risk balance system, which consists of three modules, including a comprehensive alert processing module, an online risk assessment module, and a risk balance response decision-making module. The alert processing module improves the information quality of...

article

Quantitative survivability evaluation of three virtual machine-based server architectures

Yan Yang, Yulong Zhang, Alex Hai Wang, Meng Yu, more

Journal of Network and Computer Applications > 2013 > 36 > 2 > 781-790

Virtual machine-based services have become very popular in data centers and cloud computing in recent years. Efficient redundancy technology of virtual machine provides good availability for services; thus, it has become possible to provide continuous services even if the system suffers intrusions. So far, many intrusion tolerant server architectures have been developed based on virtual machine technology...

chapter

Collaborative Traffic-Aware Intrusion Monitoring in Multi-channel Mesh Networks

Qijun Gu, Wanyu Zang, Meng Yu, Peng Liu

2012 IEEE 11th International Conference on Trust, Security and Privacy in Computing and Communications > 793 - 800

2012 IEEE 11th International Conference on Trust, Security and Privacy in Computing and Communications (TrustCom)

Intrusion monitoring is an indispensable security measure for multi-channel wireless mesh networks. This paper studies how to use mesh routers to monitor a network while supporting regular traffic. This paper shows that the traffic aware monitoring (TRAM) problem is an NP-hard problem, which is challenging in coordinating monitoring and traffic forwarding to provide maximal monitoring coverage. This...

chapter

Lightweight Attacks against Channel Assignment Protocols in MIMC Wireless Networks

Qijun Gu, Meng Yu, Wanyu Zang, Peng Liu

2011 IEEE International Conference on Communications (ICC) > 1 - 6

ICC 2011 - 2011 IEEE International Conference on Communications

Although multi-interface multi-channel (MIMC) wireless networks have drawn much attention, they are susceptible to various attacks. This paper describes three new types of attacks against a variety of channel assignment protocols: utilization-based conflict attack, link break attack, and denial-of-data attack. These attacks exploit the vulnerabilities arising from the inherent properties of channel...

chapter

Evaluating survivability and costs of three virtual machine based server architectures

Meng Yu, Alex Hai Wang, Wanyu Zang, Peng Liu

2010 International Conference on Security and Cryptography (SECRYPT) > 1 - 8

2010 International Conference on Security and Cryptography (SECRYPT 2010)

Virtual machine based services are becoming predominant in data centers or cloud computing since virtual machines can provide strong isolation and better monitoring for security purposes. While there are many promising security techniques based on virtual machines, it is not clear how significant the difference between various system architectures can be in term of survivability. In this paper, we...

chapter

An Attack-Resilient Channel Assignment MAC Protocol

Wanyu Zang, Qijun Gu, Meng Yu, Peng Liu

2009 International Conference on Network-Based Information Systems > 246 - 253

2009 12th International Conference on Network-Based Information Systems (NBiS 2009)

Although multi-channel wireless protocols are becoming predominant, security mechanisms of channel assignment are far from sufficient to protect the channel usage. In this paper, we discuss radio jamming attacks, ripple effect attacks and false information injection attacks in multi-interface and multi-channel wireless networks. We propose a security mechanism to secure channel management in multi-channel...

article

The implementation and evaluation of a recovery system for workflows

Meng Yu, Peng Liu, Wanyu Zang

Journal of Network and Computer Applications > 2009 > 32 > 1 > 158-183

Workflow systems are popular in daily business processing. Since vulnerability cannot be totally removed from a workflow management system, successful attacks always happen and may inject malicious tasks or incorrect data into the workflow system. Moreover, legitimate tasks referring to the incorrect data will further corrupt more data objects in the system. As a result, the integrity level of the...

chapter

Decentralized Trust Management based on the Reputation of Information Sources

Meng Yu, Wanyu Zang, B. Reagor

2007 IEEE International Conference on Networking, Sensing and Control > 212 - 217

2007 IEEE International Conference Networking, Sensing and Control

In a distributed system, the classic PGP and PKI techniques provide means to establish trust based on credentials. However, the credentials are not bound to integrity levels. Furthermore, the structure of certification authority (CA) is centralized, which is vulnerable to be the single point failure even if backups are present. In this paper, we propose a decentralized method to establish trust in...

chapter

Defensive execution of transactional processes against attacks

Meng Yu, Wanyu Zang, Peng Liu

21st Annual Computer Security Applications Conference (ACSAC'5) > 10 pp. - 526

Proceedings. 21st Annual Computer Security Applications Conference

It is a well known problem that the attack recovery of a self-healing system rolls back not only malicious transactions, but also legitimate transactions that are dependent on the malicious transactions. Rolling back and re-executing damaged transactions increase the response time of the system and may cause a significant processing delay. In such situations, the availability of the system is compromised...

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