Design and performance evaluation of a lightweight wireless early warning intrusion detection prototype

The proliferation of wireless networks has been remarkable during the last decade. The license-free nature of the ISM band along with the rapid proliferation of the Wi-Fi-enabled devices, especially the smart phones, has substantially increased the demand for broadband wireless access. However, due to their open nature, wireless networks are susceptible to a number of attacks. In this work, we present anomaly-based intrusion detection algorithms for the detection of three types of attacks: (i) attacks performed on the same channel legitimate clients use for communication, (ii) attacks on neighbouring channels, and (iii) severe attacks that completely block network's operation. Our detection algorithms are based on the cumulative sum change-point technique and they execute on a real lightweight prototype based on a limited resource mini-ITX node. The performance evaluation shows that even with limited hardware resources, the prototype can detect attacks with high detection rates and a few false alarms. © 2012 Fragkiadakis et al

Challenges of Misbehavior Detection in Industrial Wireless Networks

In recent years, wireless technologies are increasingly adopted in many application domains that were either unconnected before or exclusively used cable networks. This paradigm shift towards - often ad-hoc - wireless communication has led to significant benefits in terms of flexibility and mobility. Alongside with these benefits, however, arise new attack vectors, which cannot be mitigated by traditional security measures. Hence, mechanisms that are orthogonal to cryptographic security techniques are necessary in order to detect adversaries. In traditional networks, such mechanisms are subsumed under the term "intrusion detection system" and many proposals have been implemented for different application domains. More recently, the term "misbehavior detection" has been coined to encompass detection mechanisms especially for attacks in wireless networks. In this paper, we use industrial wireless networks as an exemplary application domain to discuss new directions and future challenges in detecting insider attacks. To that end, we review existing work on intrusion detection in mobile ad-hoc networks. We focus on physical-layer-based detection mechanisms as these are a particularly interesting research direction that had not been reasonable before widespread use of wireless technology.Peer Reviewe

Preparation of Zinc-Sulfide Thin Films in the Presence of Sodium Tartrate as a complexing agent

The article offers information on the experiment done for the electrodeposition of zinc-sulfide (ZnS) thin films on the titanium substrate in the presence of sodium tartrate as a complexing agent. It states that the electrodeposition process has several advantages such as the possibility for large-scale production and minimum waste of components. It mentions that depositions were carried out by varying the deposition potential to determine the optimal conditions of deposition of ZnS thin film

Copper Selenide Nanosnakes: Bovine Serum Albumin-Assisted Room Temperature Controllable Synthesis and Characterization

Herein we firstly reported a simple, environment-friendly, controllable synthetic method of CuSe nanosnakes at room temperature using copper salts and sodium selenosulfate as the reactants, and bovine serum albumin (BSA) as foaming agent. As the amounts of selenide ions (Se2−) released from Na2SeSO3 in the solution increased, the cubic and snake-like CuSe nanostructures were formed gradually, the cubic nanostructures were captured by the CuSe nanosnakes, the CuSe nanosnakes grew wider and longer as the reaction time increased. Finally, the cubic CuSe nanostructures were completely replaced by BSA–CuSe nanosnakes. The prepared BSA–CuSe nanosnakes exhibited enhanced biocompatibility than the CuSe nanocrystals, which highly suggest that as-prepared BSA–CuSe nanosnakes have great potentials in applications such as biomedical engineering

Photoelectrochemical and photocatalytic activity of nanocrystalline TiO2 thin films deposited by chemical bath deposition method

The thin films of nanocrystalline TiO2 were synthesized using titanium isopropoxide as a source of Ti on fluorine-doped tin oxide (FTO) and commercial glass substrates by chemical bath deposition method. The resultant films were annealed at different temperatures (300, 400 and 500 °C) for 3 h. The annealed nanocrystalline thin films were thoroughly characterized by XRD, SEM, UV–Vis. DRS, PL, FT-IR, Raman and TEM. The XRD study shows the average crystallite size of TiO2 is 15 nm having anatase phase, while as temperature increases crystallite size increases. SEM and TEM results show elongated spherical shape of TiO2 nanocrystals. Optical absorption spectra show the band gap energy decreases from 3.2 to 3.1 eV as annealing temperature increases. From the PL spectra, an emission peak observed at 600 nm is due to the indirect band gap and defects present in the material. The FT-IR spectrum of TiO2 thin film annealed at 400 °C shows the band at 532 cm−1 due to O–Ti–O stretching vibrations confirms the formation of anatase TiO2. The Raman spectrum shows an intense peak at 149 cm−1 and four weaker peaks are characteristics of anatase phase of TiO2. The photodegradation efficiency of methyl orange (MO) was observed to be 92% by using TiO2 thin film within 90 min under UV–Vis. light. It shows enhanced photoconversion efficiency of 1.02% under UV light.</p

Synthesis and X-ray diffraction studies of 4-[2'-hydroxy salicylidene-5' (2"-thiazolylazo)] methoxy benzene

817-820<span style="font-size: 15.0pt;mso-bidi-font-size:8.0pt;font-family:" times="" new="" roman","serif""="">The new compounds having azo Schiff base characteristics have been synthesized by condensing 5-(2'-thiazolylazo) salicylaldehyde with para-substituted aniline and subjected for structural characterization. X-ray diffraction study has been carried out for 4-[2'-hydroxy salicylidene-5'-(2'-thiazolylazo)]methoxy benzene. The structure of compound is found to be <span style="font-size: 15.0pt;mso-bidi-font-size:8.0pt;font-family:" times="" new="" roman","serif""="">tetragonal, belonging to non-primitive system. The strain broadening effects are also examined and discussed. </span

Synthesis and characterization of Mn(II),Co(II), Ni(II), Cu(II) and Zn (II) azo coumarin complexes

1464-1467Complexes of the composition [M (L)2 (H2O)2].xH2O where L is deprotonated ligands like HL1 = 8-(-2-azothiazolyl-)-7- hydroxy 4-methyl coumarin and HL2 = 8-(-2-azobenzothiazolyl -)-7-hydroxy 4-methyl coumarin ; M = Mn(II), Co(II), Ni(II ), Cu(II) and Zn(II ); x = 1 to 4 have been synthesized and characterized by elemental analysis, magnetic susceptibility, molar conductance, TGA, X-ray diffraction and spectral studies. HL1 and HL2 act as neutral bidenate ligands and the complexes appear to be octahedral. Antibacterial activities of ligands and their metal complexes have been determined against Escherichia coli, Bacillus substilis, Klebsiella pheumoniae, Pseudomonas aerogens, Salmonalla paratyphi B, Staphylococcus &nbsp;aureus and Proteus vulgaris.</i

Discovering Flaws in IDS Through Analysis of Their Inputs

International audienceTo secure Wireless Ad-hoc Networks (WANET) against malicious behaviors , three components are needed: prevention, detection, and response. In this paper, we focus on Intrusion Detection Systems (IDS) for WANET. We classify the different inputs used by the decision process of these IDS, according to their level of cooperation, and the source of their data. We then propose a decision aid which allows automated discovery of attacks for IDS, according to the inputs used. Finally we apply our framework to discover weaknesses in two existing IDS