security issues in wireless systems

... from disciplines such as Information Science (Studies), Library Science, Management Information Systems, Computer Science, Information Engineering, System Engineering, Electrical Engineering, Communication ... (Witten, 2002) • Text Indexing and Retrieval: Indexing is another rapidly growing topic of interest in digital libraries Indexing is an important task for retrieval However, while indexing research is ... benefits include cost saving, avoiding duplication of effort, broadening of the communication process, reduction in time in announcing findings, expansion of audience, and, above all, preserving information...

Ngày tải lên: 01/06/2014, 00:46

... currently in the process of defending his Ph.D thesis in telecommunications in the School of Electrical Engineering and Computer Science in the University of Patras, Greece His main interests are wireless ... wireless ATM MAC protocol,” in Proceedings of Wireless ATM Workshop, Helsinki, Finland, September 1996 [15] J Sanchez, R Martinez, and M W Marcellin, “A survey of MAC protocols proposed for wireless ... has been studying in the Electrical and Computer Engineering School of University of Patras, Greece, since 2001, and he is currently in his last year of studies His interests include wireless local...

Ngày tải lên: 22/06/2014, 22:20

Ngày tải lên: 17/09/2012, 09:13

... other Linksys 802.11a products Linksys WAP51AB Dual Band Access Point Wireless Linksys WPC51AB 802.11a only PCMCIA Adapter Wireless Linksys WPC11 802.11b only PCMCIA Adapter Wireless M40 - Wireless ... AirPlus products Wireless Router and Print Server D-Link AB520 AirPro DWL- 802.11a, 802.11b Wireless PCI Adapter Linksys BEFW11S4 802.11b only Wireless Access with 4-port switch Point 802.11a, 802.11b, ... bị Wireless LANs Product Name D-Link 650+AirPlus Type Features DWL- 802.11b, 22Mbps with AirPlus products PCMCIA Adapter Wireless D-Link DWL6000AP AirPro Multimode Access Point D-Link AirPlus Wireless...

Ngày tải lên: 01/09/2013, 10:43

... will continue to be a significant application, the wireless Internet combination will shift the nature of wireless systems from today’s voice-oriented wireless systems towards data-centric systems ... expected to decline, the industry is up against a new challenge: that of integration with the Internet The result of this integration, the wireless Internet, is expected to significantly increase the ... 166 Independent Basic Service Set (IBSS), 265 Indoor propagation, 39 Infrared band, 29 Infrared physical layer, 247 Infrastructure wireless LAN, 243 Insertion attacks, 329 Integrity, 331 Interception,...

Ngày tải lên: 29/09/2013, 21:20

... termination and invokes the report generator when the conditions for terminating the simulation are satisfied Simulation begins at time with the main program invoking the initialization routine, ... delay in the path including the Internet routing delays We simulated a data combined multimedia network operating in a WLAN environment The network has 20 wireless stations capable of transferring ... correct [1–10] Systems in general can be classified into stochastic and deterministic types [1–3]: † Stochastic systems In this case, the system contains a certain amount of randomness in its transitions...

Ngày tải lên: 29/09/2013, 21:20

... exploiting the inherent frequency diversity in the channel Broadly speaking, there are three common approaches: • single-carrier systems with equalization: By using linear and non-linear processing at ... This is a slight abuse of notation as we originally denote h[n] as the fading gain at time n Here we are re-indexing the symbols, assuming that interleaving is already done 39 The average error probability ... a coding gain of (3.5 dB) over the repetition code We see that the improvement from non-trivial coding comes from increasing the minimum product distance, and this is in turn due to spreading...

Ngày tải lên: 20/10/2013, 07:15

... Ghani 10 Security and Wireless Banking and Trading Security is probably one of the most important issues in wireless banking, if not the most important A recent study on wireless banking security ... uncovered the main challenge facing both wireless banking innovators and online banking establishments; nearly 85 percent of respondents are worried about online security transactions, including credit ... change Wireless banking and trading is only an extension of the product offerings for the financial institutions It is not an extension of web technology, as often perceived Online banking and online...

Ngày tải lên: 26/10/2013, 16:15

... phenomena such as lightning or man-made sources, including transmitting and receiving equipment as well as spark plugs in passing cars, wiring in thermostats, etc ● Sometimes modeled in the aggregate ... Multipoint Distribution Service (LMDS) ■ Operates around 30 GHz ■ Point-to-multipoint, with applications including Internet access and telephony ■ Virginia Tech owns spectrum in SW VA and surroundings ... processing required of the mobiles units Wireless Environment and Wireless LANs 16 Security ● Safeguards for physical security must be even greater in wireless communications ● Encryption: intercepted...

Ngày tải lên: 29/10/2013, 06:15

... Ghani 10 Security and Wireless Banking and Trading Security is probably one of the most important issues in wireless banking, if not the most important A recent study on wireless banking security ... uncovered the main challenge facing both wireless banking innovators and online banking establishments; nearly 85 percent of respondents are worried about online security transactions, including credit ... change Wireless banking and trading is only an extension of the product offerings for the financial institutions It is not an extension of web technology, as often perceived Online banking and online...

Ngày tải lên: 21/12/2013, 02:15

... Designing for Profitability in the Physical Layer of Wireless Networks Introduction Growth in wireless services is increasing the number of copper and fiber cables that must be managed – causing ... bends in routing paths, adding new fibers on top of existing fibers can greatly increase the pressure on existing fibers As a result, fibers that have performed fine for years start showing increased ... eliminating the possibility that fibers from that downspout can be routed incorrectly into an interbay management panel In another example, proper cable Clearly defined cable routing paths routing...

Ngày tải lên: 21/12/2013, 08:17

... 14-1 IEEE 802.11 IEEE has defined the specifications for a wireless LAN, called IEEE 802.11, which covers the physical and data link layers Topics discussed in this section: Architecture MAC ... Example of repetition interval 14.9 Figure 14.7 Frame format 14.10 Table 14.1 Subfields in FC field 14.11 Figure 14.8 Control frames 14.12 Table 14.2 Values of subfields in control frames 14.13 ... Addressing mechanisms 14.15 Figure 14.10 Hidden station problem 14.16 Note The CTS frame in CSMA/CA handshake can prevent collision from a hidden station 14.17 Figure 14.11 Use of handshaking to...

Ngày tải lên: 16/02/2014, 20:20

... Nigam, J Rennie and K Seymore 1999 Building Domain-Specific Search Engines with Machine Learning Techniques In AAAI99 Spring Symposium on Intelligent Agents in Cyberspace Discussion and Future Work ... (PP IN) (NP NNP)) (O )) where the model makes no use of the word information contained in the sentence 4.2 Grammar Parsing Creation of a parse tree involves describing language grammar in a ... -measure against the number of training sentences during text chunking (A: MHHMM, B: HHMM and C: HMM) JJ Figure 5: Parse tree for the HHMM The first finding is that the size of training data dramatically...

Ngày tải lên: 08/03/2014, 02:21

... consumers in that community also benefit with a safe, nutritious and sustainable food supply For example, in Argentina, the economic gains resulting from a 140 percent increase in soybean area since ... diesel fuel in biotech crops, due to a reduction in pesticide spray applications and a reduction in plowing An increase in the amount of carbon held in the soil due to a reduction in plowing associated ... of research indicates multiple health benefits of consuming soy, including: alleviating menopausal symptoms29 30 , reducing cardiovascular disease risk31 32, reducing risk of certain cancers33...

Ngày tải lên: 13/03/2014, 21:57

... you are studying for anything, then study it and learn all you can about that topic If you aren’t currently studying for anything then find something you’ve always been interested in and study ... you get this kind of thing out of the way before you find yourself in a very embarrassing situation Not being open about this could land you in two opposite ends of an embarrassing situation ... different kinds of flirting; flirting to get your own way, flirting to get some attention, flirting because you fancy someone First of all let’s think about what you’re going to allow yourself to in...

Ngày tải lên: 14/03/2014, 14:02

... within cubic volumes in the head phantom It is generally recognized that the interpretation of EEG findings is difficult because of the high intra-individual variability in attention and waking ... bilayer, allowing molecules like DNA to pass into the cell   Chains of living or nonliving particles (pearl chains) form along the lines of force of electro­ magnetic fields (including RF fields) ... that records the changes in electrical potentials (brain waves) in various parts of the brain Summary In recent years there has been a rapid increase in the use of wireless communications devices,...

Ngày tải lên: 15/03/2014, 15:20

... Dotted curve in inset is probability of broken link assuming a much higher concentration of DNA links in solution Measured extinction at fixed wavelength vs temperature (left) extinction of an ... “melon” morphology Maximum splitting in expt: 30 meV; in melon config, 22 mev) Propagating Waves of Surface Plasmons in Chains of Nanoparticles     A chain of closely spaced metallic nanoparticles ... waveguide is excited using the tip of near-field scanning optical microscope (NSOM), and wave is detected using fluorescent nanospheres Calculation of SP modes in nanoparticle chain  In the dipole approximation,...

Ngày tải lên: 15/03/2014, 23:50

... security safeguards, training, and consultants Leaving the security of your wireless network unattended is asking for trouble, and designing a network with security in mind from the very beginning ... you will see that defending wireless networks can be as thrilling and fascinating as finding and attacking them, and you could easily end up as a local wireless community security guru or even ... anyone planning to install a wireless network or secure an already existing one Wireless Crackers: Who Are They? Knowing what kind of individual might launch an attack against your wireless network...

Ngày tải lên: 19/03/2014, 13:37