Data security in wireless network has posed as a threat that has stuck to the core of data communication from point A to point B. There have been a variety of security issues raised in wired and wireless networks and ...Data security in wireless network has posed as a threat that has stuck to the core of data communication from point A to point B. There have been a variety of security issues raised in wired and wireless networks and security specialists proposed a variety of solutions. The proposed security solutions in wired networks could not be successfully implemented in wireless networks to identify, authenticate and authorize users due to infrastructural and working principles of wireless networks. Data on wireless network are much exposed to threats because the network is been broadcasted unlike a wired network. Researchers have proposed WEP and WPA to provide security in wireless networks. This research is going to compare the WEP and WPA mechanism for better understanding of their working principles and security bugs.展开更多
Objective Aiming at lots of vulnerabilities in the Wired Equivalent Privacy (WEP) which threats the authentication and confidentiality in wireless communication, a new kind of mutual authentication and privacy mechan...Objective Aiming at lots of vulnerabilities in the Wired Equivalent Privacy (WEP) which threats the authentication and confidentiality in wireless communication, a new kind of mutual authentication and privacy mechanism named MWEP(Modified WEP) is proposed. Methods MWEP is based on pseudo random number generator (PRNG) and asymmetric cryptograph approach, it generates a unique session key like “One Time Password” for each data frame transmission between any two mobile stations. Results Using this session key to encrypt the transmission data, not only can it avoid replay attack, but also provide a good secure virtual channel for the sender and receiver. MWEP can be incorporated into IEEE 802.11. Conclusion It shows that the proposed mechanism is effective and practical after comparison with WEP and simulation.展开更多
Handoff in IEEE 802.11 requires the repeated authentication and key exchange procedures, which will make the provision of seamless services in wireless LAN more difficult. To reduce the overhead, the proactive caching...Handoff in IEEE 802.11 requires the repeated authentication and key exchange procedures, which will make the provision of seamless services in wireless LAN more difficult. To reduce the overhead, the proactive caching schemes have been proposed. However, they require too many control packets delivering the security context information to neighbor access points. Our contribution＇ is made in two-fold： one is a significant decrease in the number of control packets for proactive caching and the other is a superior cache replacement algorithm.展开更多
In Wireless Sensor Networks (WSNs), it is necessary to predict computational overheads of security mechanisms without final implementations to provide guidelines for system design. This paper presents an accurate and ...In Wireless Sensor Networks (WSNs), it is necessary to predict computational overheads of security mechanisms without final implementations to provide guidelines for system design. This paper presents an accurate and flexible model to predict overheads of these mechanisms. This model is based on overheads of basic operations frequently used in cryptography algorithms, which are essential elements of security mechanisms. Several popular cryptography algorithms and security mechanisms are evaluated using this model. According to simulation results, relative prediction errors are less than 7% for most cryptography algorithms and security mechanisms.展开更多
Underwater Wireless Sensor Networks(UWSNs)are becoming increasingly popular in marine applications due to advances in wireless and microelectronics technology.However,UWSNs present challenges in processing,energy,and ...Underwater Wireless Sensor Networks(UWSNs)are becoming increasingly popular in marine applications due to advances in wireless and microelectronics technology.However,UWSNs present challenges in processing,energy,and memory storage due to the use of acoustic waves for communication,which results in long delays,significant power consumption,limited bandwidth,and packet loss.This paper provides a comprehensive review of the latest advancements in UWSNs,including essential services,common platforms,critical elements,and components such as localization algorithms,communication,synchronization,security,mobility,and applications.Despite significant progress,reliable and flexible solutions are needed to meet the evolving requirements of UWSNs.The purpose of this paper is to provide a framework for future research in the field of UWSNs by examining recent advancements,establishing a standard platform and service criteria,using a taxonomy to determine critical elements,and emphasizing important unresolved issues.展开更多
文摘Data security in wireless network has posed as a threat that has stuck to the core of data communication from point A to point B. There have been a variety of security issues raised in wired and wireless networks and security specialists proposed a variety of solutions. The proposed security solutions in wired networks could not be successfully implemented in wireless networks to identify, authenticate and authorize users due to infrastructural and working principles of wireless networks. Data on wireless network are much exposed to threats because the network is been broadcasted unlike a wired network. Researchers have proposed WEP and WPA to provide security in wireless networks. This research is going to compare the WEP and WPA mechanism for better understanding of their working principles and security bugs.
基金ThisprojectwassupportedbytheFoundationofNational863ClimbingProject (No .2 001BA101A01).HarvardUniversityDivisionofEngineeringandAppliedScience+1 种基金Cambridge MA0 2 1 38.
文摘Objective Aiming at lots of vulnerabilities in the Wired Equivalent Privacy (WEP) which threats the authentication and confidentiality in wireless communication, a new kind of mutual authentication and privacy mechanism named MWEP(Modified WEP) is proposed. Methods MWEP is based on pseudo random number generator (PRNG) and asymmetric cryptograph approach, it generates a unique session key like “One Time Password” for each data frame transmission between any two mobile stations. Results Using this session key to encrypt the transmission data, not only can it avoid replay attack, but also provide a good secure virtual channel for the sender and receiver. MWEP can be incorporated into IEEE 802.11. Conclusion It shows that the proposed mechanism is effective and practical after comparison with WEP and simulation.
文摘Handoff in IEEE 802.11 requires the repeated authentication and key exchange procedures, which will make the provision of seamless services in wireless LAN more difficult. To reduce the overhead, the proactive caching schemes have been proposed. However, they require too many control packets delivering the security context information to neighbor access points. Our contribution＇ is made in two-fold： one is a significant decrease in the number of control packets for proactive caching and the other is a superior cache replacement algorithm.
基金Supported by 863 Project of China (No.2006AA01Z224)
文摘In Wireless Sensor Networks (WSNs), it is necessary to predict computational overheads of security mechanisms without final implementations to provide guidelines for system design. This paper presents an accurate and flexible model to predict overheads of these mechanisms. This model is based on overheads of basic operations frequently used in cryptography algorithms, which are essential elements of security mechanisms. Several popular cryptography algorithms and security mechanisms are evaluated using this model. According to simulation results, relative prediction errors are less than 7% for most cryptography algorithms and security mechanisms.
文摘Underwater Wireless Sensor Networks(UWSNs)are becoming increasingly popular in marine applications due to advances in wireless and microelectronics technology.However,UWSNs present challenges in processing,energy,and memory storage due to the use of acoustic waves for communication,which results in long delays,significant power consumption,limited bandwidth,and packet loss.This paper provides a comprehensive review of the latest advancements in UWSNs,including essential services,common platforms,critical elements,and components such as localization algorithms,communication,synchronization,security,mobility,and applications.Despite significant progress,reliable and flexible solutions are needed to meet the evolving requirements of UWSNs.The purpose of this paper is to provide a framework for future research in the field of UWSNs by examining recent advancements,establishing a standard platform and service criteria,using a taxonomy to determine critical elements,and emphasizing important unresolved issues.
