containing denialofservice attacks in broadcast authentication in sensor networks

Ngày tải lên: 21/06/2014, 11:20

... a very large database of RSS fingerprints. Machine learning techniques are employed to extract the location information from online RSS measurements showing promising performance for room-level ... robustness to NLOS errors, indoor positioning, and localization in wireless sensor networks (WSNs). The first group of articles deals with the interaction of positioning and communications at ... reproduction in any medium, provided the original work is properly cited. al. propose a channel parameter estimator for joint com- munications and positioning systems, using soft infor- mation concerning...

Ngày tải lên: 20/06/2014, 21:20

Ngày tải lên: 21/06/2014, 08:20

Ngày tải lên: 22/06/2014, 22:20

Ngày tải lên: 31/07/2013, 09:43

... labor wisely. Against this backdrop, using factory-terminated fiber in stations makes a lot of sense. The labor savings associated with using factory- terminated cables in most instances make it ... elimination of wasted material and time offered by using factory-terminated fiber optic cable make a little re-orientation in engineering mindset and practice more than worthwhile. Top Ten Things ... Connector Termination Top Ten Things to Know Page 9 Common practice among broadcast engineers calls for cutting coax to the desired length and attaching connectors in the field. Doing so with coax...

Ngày tải lên: 10/12/2013, 02:15

... reflected into cladding along Ø 3 n 1 n 2 Fiber Casing Fiber Core polishing creates a rounded finish WHITE PAPER Fiber in Broadcast and Production Facilities Top Ten Things to Know Top Ten Things ... the broadcast business evolves from a single analog channel to a digital broadcast world, the continued roll of coax cable is being re-evaluated. In its place, fiber optic cable is emerging ... such as following a 1.5-inch bend radius policy, guarding against excessive cable pile-up, troughing horizontal runs, implementing vertical cable protection and providing for expanding slack...

Ngày tải lên: 21/12/2013, 07:17

Ngày tải lên: 01/01/2014, 20:12

... CHAP Challenge message containing a session ID and an arbitrary challenge string. 2. The remote access client returns a CHAP Response message containing the user name in plain text and a hash ... Response message containing the user name in plain text and a hash of the challenge string, session ID, and the MD4 hash of the client's password using the MD4 one-way hashing algorithm. ... document may be reproduced, stored in or introduced into a retrieval system, or transmitted in any form or by any means (electronic, mechanical, photocopying, recording, or otherwise), or for any...

Ngày tải lên: 18/01/2014, 05:20

... customer authentication, as described in the 2005 Guidance, is broad. It includes more than the initial authentication of the customer when he/she connects to the financial institution at login. Since ... related to: initial login and authentication of customers requesting access to the institution’s electronic banking system; and initiation of electronic transactions involving the transfer ... continued to innovate in response to the increasing cyber threat environment. In addition to some of the control methods previously discussed, other examples of customer authentication include...

Ngày tải lên: 17/02/2014, 21:20

... after receiving his B.Sc. degree in electrical engineering; he worked as a broadcasting engineer for two years and is currently attempting to pursue his educational knowledge by undertaking a Ph.D ... node Passive information gathering Sybil attacks Sinkhole attacks wormhole attacks False node and malicious data International Journal of Computer Science & Engineering Survey (IJCSES) ... using these protocols. The main purpose of these nodes is to gather information or events occurring from their targets. The main functions associated with sensor nodes include: collecting information...

Ngày tải lên: 05/03/2014, 23:20

... train- ing set by either oversampling the minority class or downsampling the majority class. In this prelimi- nary study of sampling approaches for handling im- balanced data for CRF training, ... using constraint classifiers. In Proceedings of HLT/NAACL. D. Hillard, M. Ostendorf, and E. Shriberg. 2003. De- tection of agreement vs. disagreement in meetings: Training with unlabeled data. In ... these two sam- pling approaches as well as the baseline are shown in Table 3. Both sampling approaches achieved sig- nificant improvement over the baseline, i.e., train- ing on the original data set,...

Ngày tải lên: 07/03/2014, 22:20

... 10.1109/TNET.2005.857076 Fig. 1. Typical sensor network topology with event and sink. The sink is only interested in collective information of sensor nodes within the event radius and not in their individual data. To ... PROBLEM IN WSN In the preceding discussions, we introduced the notion of event-to-sink reliability in WSN and pointed out the inapplica- bility of existing transport solutions. Before proceeding ... wireless sensor networks, ” in Proc. ACM WSNA, Atlanta, GA, Sep. 2002, pp. 1–11. [13] J. Zhao and R. Govindan, “Understanding packet delivery performance in dense wireless sensor networks, ” in Proc....

Ngày tải lên: 16/03/2014, 19:20

... Culler. Taming the underlying challenges of reliable multihop routing in sensor networks. In Proc. of SenSys, 2003. [31] Yong Yao and Johannes Gehrke. Query processing in sensor net- works. In Proceedings ... node, and then sending this result back to the node containing the original table and joining again. This semi-join technique is an interesting possible optimization, though our Bloom-filter ... Processing. In IPSN, 2003. [7] M. Chu, et al. Scalable information-driven sensor querying and routing for ad hoc heterogeneous sensor networks. Int. Journal of High Perform- ance Computing, 2002....

Ngày tải lên: 30/03/2014, 16:20

... Ula 20 arcsin( ) c t d θ ∆ = (3.1) 0 2 2 sin( )AA AOA c T c BN N f σ π θ ≥ ∆ (3.2) Đồ án 2 Localization in the wireless sensor networks 1 [min(x +d ),min(y +d )] i i i i P = 2 [max(x -d ),min(y +d ... án 2 Localization in the wireless sensor networks 2.2 THU THẬP THÔNG TIN XỬ LÝ VÀ LƯU TRỮ DỮ LIỆU - Ứng dụng trong giao thông: Mục tiêu của các hệ thống này là thu nhập thông tin thông qua các ... 2 Localization in the wireless sensor networks - WSNs hỗ trợ kích cỡ mạng khác nhau, từ một đến vài trăm nút.Có thể trải trên một phạm vị rộng lớn. - Tiết kiệm chi phí. - Tính linh hoạt của hệ...

Ngày tải lên: 27/05/2014, 11:41

... communication SNR levels. It is interesting to see that using more training symbols does not improve the performance of the MLE as expected, because inserting training symbols will reduce the energy ... discussed, inserting training symbols is a heuristic way to improve the performance. It is shown in the 25 Decentralized estimation over orthogonal multiple- access fading channels in wireless sensor networks optimal ... sor s can transmit training symbols to facilitate channel estimation. The training symbols can be incorporated into the message function c(x). Then, t he MLE with training symbols available is...

Ngày tải lên: 18/06/2014, 22:20

... communication SNR levels. It is interesting to see that using more training symbols does not improve the performance of the MLE as expected, because inserting training symbols will reduce the energy ... designed in [10–12]. The optimal trade-off between the number of active sensors and the quantization bit rate of each sensor is investigated u nd e r total energy constraint in [13]. In binary 2 During ... first inequality in (76) and t he second inequality in (77) are satisfied. From the condition f(θ)(θ − Φ) < 0, it is not hard to find that the second inequality in (76) and the first inequality in...

Ngày tải lên: 20/06/2014, 04:20

... multi-sink WSN in which the deployment of sensors is performed in a random fashion, e.g., dropping sensors from helicopters flying above the field [4]. As shown in Figure 1, in this mobile multi-sink ... diffusion [5] is a flooding-based approach introducing data-centric routing for sensor networks. In this approach, each sink must periodically flood its location information through the sensor field. This ... line (i.e., line r) as sink. In Figure 6, where both the sink and the node E are located on the line s, node E in cell [2, 0] forwards the packet to the cell [4, 1] according to the rule in line...

Ngày tải lên: 20/06/2014, 20:20

... wireless sensor networks, in Proceedings of IEEE WoWMoM, Kos, Greece, 15–19 (June 2009) 11. J Choi, C Lee, Energy modeling inside a cluster for the multi-hop clustered sensor networks, in Proceedings ... models in determining the optimal probability of being a cluster-head, thus minimizing the energy consumed in the network. The optimal probability p*obtainedfromtheNewton method is provided in Table ... lifetime analysis in clustered multi-hop wireless sensor networks using the probabilistic cluster-head selection method Jinchul Choi and Chaewoo Lee * Abstract Clustering sensor nodes into groups is...

Ngày tải lên: 20/06/2014, 22:20