denial of service attacks in wireless networks ppt

... high-income areas. Consider the following. The Durban Chamber of Commerce and Industry “has in recent years expressed the concern of its members regarding the increasing cost of doing business in ... better-off individuals have been the main beneficiaries of increasing ideological free-market funding systems Most development finance in the past has given priority to private profit – of developers, ... afford). In the context of South Africa, granting service quality along income lines was a guarantee that apartheid-era living standards would remain intact. Apart from the question of basic service...

Ngày tải lên: 06/03/2014, 04:20

... commissioner of prisons, ZPS] and judge fellow inmates and mete out punishments, including beatings, through night-time courts in their cells. According to both inmates and prison officials, drinking ... in- depth inter- view to provide a way of systematically presenting key indicators, as well as of allowing more thorough docu- mentation of conditions and nuanced understanding of the interrelation of ... regarding prison conditions, discipline and HIV/TB risk behaviour in open-ended, in- depth interviews. All interviews were conducted outside of the hearing of prison officers and other prisoners, in...

Ngày tải lên: 20/06/2014, 08:20

... contents-providing services, presence services, and E-911 locating services, have recently been drawing much attention in wireless network community. Since LBSs rely on the location information in providing ... a wireless link error scenario comes into play in order to see whether the fairness is supported in t ime-varying unreliable wireless link, whi ch is to ver ify the role of ω s i in calculating per-location ... dynamics of TaLE-enabled Hot Spot in the presence of wireless link errors. Table 8 Average per-location throughput of TaLE- enabled Hot Spot in the presence of wireless link errors. Time interval...

Ngày tải lên: 21/06/2014, 00:20

... M) Flooding (b) Stochastic pulsing attacks and flooding attacks Figure 7: Average detection time for pulsing and flooding attacks using Vanguard. 12 EURASIP Journal on Advances in Signal Processing Table ... 40M) Flooding (b) Stochastic pulsing attacks and flooding attacks Figure 8: Average detection time for pulsing and flooding attacks using the WCM method. value p = 0.01. The period and the burst width of ... pages doi:10.1155/2009/256821 Research Article Detecting Pulsing Denial- of- Service Attacks with Nondeterministic Attack Intervals XiapuLuo,EdmondW.W.Chan,andRockyK.C.Chang Department of Computing, The Hong Kong Polytechnic...

Ngày tải lên: 21/06/2014, 22:20

... paper. 2. Intrusion Detection in Wireless Networks This section examines the state of intrusion detection in wireless networks, with a particular emphasis on statistical approaches. The wireless intrusion ... clus- tering approach for intrusion detection in mobile ad hoc networks, ” in Proceedings of the 13th International Conference on Software, Telecommunications and Computer Networks (SoftCOM ’05), ... expected to appear in the near future. The intrinsic features of wireless mobile networks make them more vulnerable than wired fixed networks. For instance, the nature of wireless radio links renders...

Ngày tải lên: 21/06/2014, 22:20

... Barcelona, Spain 3 Division of Communication Systems, Department of Electrical Engineering, Link ă oping University, 581 83 Link ă oping, Sweden 4 Department of Electrical and Computer Engineering, University ... reproduction in any medium, provided the original work is properly cited. Next-generation wireless networks will go beyond the point- to-point or point-to-multipoint paradigms of classical cel- lular networks. ... transceivers, relays provide diversity by creating multiple replicas of the signal of interest. By properly coordinating different spatially distributed nodes in a wireless system, one can effectively synthesize...

Ngày tải lên: 21/06/2014, 22:20

Ngày tải lên: 21/06/2014, 23:20

Ngày tải lên: 22/06/2014, 22:20

Ngày tải lên: 22/06/2014, 23:20

Ngày tải lên: 18/10/2013, 12:15

... for incrementally increasing values of the self-interference coefficient. It alternates between twosteps:increasingthevalueofavirtualself-interference coefficient g v (note that this increasing is ... is intuitively explained by looking in to the network topology. When the self-interference is significantly canceled, the resultant interference at the receiver node of any link in the case of ... the case of wireless CDMA networks the interference coefficient g ij (t) would model the residual interference at the output of despreading filter of node rec(j)[7]. Similarly, in the case wireless...

Ngày tải lên: 21/06/2014, 11:20

Ngày tải lên: 23/06/2014, 00:20

... công thường là các máy có kết nối Internet bị người tấn công xâm nhập. DDOS - Distributed Denial Of Service. ã 1998 Chng trỡnh Trinoo Distributed Denial of Service (DDoS) được viết bởi Phifli. ... thấy rõ những vụ tấn công từ chối dịch vụ (Denial Of Services Attack ) và những cuộc tấn công về việc gửi nhửng gói dữ liệu tới máy chủ (Flood Data Of Services Attack) tới tấp là những mối lo ... reboot. ã Tn cụng t chi dch vụ có rất nhiều dạng như Ping of Death, Teardrop, Aland Attack, Winnuke, Smurf Attack, UDP/ICMP Flooding, TCP/SYN Flooding, Attack DNS. • Qua đó chúng tôi đã tham khảo...

Ngày tải lên: 17/12/2013, 13:15

... Denial of Service I/. Giới thiệu khái quát về DoS: DoS (Denial of Service) có thể mô tả như hành động ngăn cản những người dùng ... trạng thái chờ (đợi gói tin ACK từ phía yêu cầu thiết lập kết nối) và liên tục gửi gói tin SYN ACK để thiết lập kết nối . Một cách khác là giả mạo địa chỉ IP nguồn của gói tin yêu cầu thiết lập ... người dùng cũng như các nguồn tin trên mạng (các thông tin cập nhật định tuyến giữa các router cũng nên thiết lập ở chế độ xác thực) - Xây dựng hệ thống lọc thông tin trên router, firewall… và...

Ngày tải lên: 17/12/2013, 13:15

... Tìm hiểu về DoS- Denial of Service/ Tấn công từ chối dịch vụ Trong tấn công từ chối dịch vụ, kẻ tấn công cố gắng ngăn cản người dùng truy cập thông tin hoặc dịch vụ. Bằng cách nhằm ... mail và ngăn chặn bạn nhận được các mail khác. Thực chất của tấn công bằng từ chối dịch vụ (Denial Of Services Attack) là hacker sẽ chiếm dụng một lựợng lớn tài nguyên trên server, tài nguyên ... reboot. Mới nhất là tấn công từ chối dịch vụ theo phương pháp phản xạ DRDoS (DistributedReflection Denial of Service) . Để thực hiện "Tấn công từ chối dịch vụ phân tán DDoS", kẻ tấn công tìm...

Ngày tải lên: 26/12/2013, 00:16

... legitimate users, by overloading its resources A Distributed Denial of Service ( DDoS ) ã On the Internet , a distributed denial- of- service A Distributed Denial - of - Service ( DDoS ) attack: , (DDoS) ... familiarize you with : ã Denial of Service( D0S) Attack ã Types of DoS Attacks ã Tools that facilitate DoS Attack ãBOTs ã Distributed Denial of Service (DDoS) Attack ã Taxonomy of DDoS Attack T l th ... stop Packets arriving at your firewall may be blocked there, but they may just as easily overwhelm the incoming side of your Internet connection overwhelm the incoming side of your Internet connection If...

Ngày tải lên: 06/03/2014, 15:20

... consideration, we study the throughput maximization of a distributed single-hop wireless network with K links, operating in a bandwidth of W. Wireless networks using unlicensed spectrum (e.g., Wi-Fi systems based ... RH( ·)representstherighthandsideof the equations. 2. Network Model and Objectives 2.1. Network Model. In this work, we consider a single-hop wireless network consisting of K pairs of nodes indexed by {1, , K}, operating in ... derivative of (31)intermsofp i is positive too. Thus, (31)isaconvex function of p i .Itisknownthataconvex function attains its maximum at one of its extreme points of its domain [28]. In other...

Ngày tải lên: 21/06/2014, 08:20

... basically consists of two phases: training phase and testing phase. A training set is used in supervised training to present the proper network behavior, where each input to the network is introduced ... parameters of digital modulation used in training, validation, and evaluation of the proposed algorithm. Besides fast convergence, one of the main advantages of RPROP lies in the fact that no choice of ... network convergence. The training algorithm is mostly defined by the learning rule, that is, the weig hts update in each training epoch. There are a number of efficient training algorithms for ANNs....

Ngày tải lên: 21/06/2014, 16:20

... the caching management of streaming data in multihop wireless networks. In this paper, we present the theoretical foundations of C 3 and a set of general rules for applying C 3 in the caching management. ... benefits in multihop wireless networks [8–10]. In the caching-enhanced multihop wireless networks, single wireless node usually has limited space for caching and can only save part of streaming data. ... Coding and Caching (C 3 ); compre for example Network Coding (NC)and no coding at all (Non-NC ). 3.1. Overview of Cooperative Coding and Caching 3.1.1. Code words. In C 3 , instead of having...

Ngày tải lên: 21/06/2014, 17:20

... Schwartz, “The value of clustering in distributed estimation for sensor networks, ” in Proceedings of the International Conference on Wireless Networks, Communications and Mobile Computing, vol. 2, pp. ... Rabbat and R. Nowak, “Distributed optimization in sensor networks, ” in Proceedings of the 3rd International Symposium on Information Processing in Sensor Networks (IPSN ’04),pp. 20–27, ACM, New York, ... prediction of dynamic fields. Online optimization of this criterion by adding or removing kernel functions from the dictionary also seems interesting. Finally, in a broader perspective, controlling the...

Ngày tải lên: 21/06/2014, 17:20