Informatics Publishing Limited

Rupinder Cheema ¹, Sanjeev Sofat ¹, Divya Bansal ²

Affiliations
1 PEC University of Technology, Chandigarh, IN
2 Computer Science Department , PEC University of Technology, Chandigarh, IN

Abstract

Wireless Mesh Networks have become an inevitable choice for gaining network access as it offers ubiquitous connectivity and improved performance due to the flexibility, scalability, features that it provides. Along with all these functionalities come the threats and vulnerabilities especially due to the fact that in case of wireless mesh networks the mesh points and mesh access points are deployed at different locations and are connected through a wireless medium to the portal. This radio communication between the mesh entities may even be heard by the attacker. The attacker may spoofs and masquerades the unencrypted management frames, thus facilitating the launch of Denial of service attacks. Moreover different mesh points communicate with each other via the forwarding action that too is based on radio communication. So the mesh devices are also vulnerable to physical tamper besides all other kinds of attacks. There is imperative need for the techniques that may thwart all kinds of security attacks. In this paper we have analyzed the impact of the beacon spoofing attack and flooding attack over the Wireless Mesh Networks test bed and proposed a security algorithm to detect this attack.

Keywords

Beacon Spoofing, Denial of Service, Detection Algorithm, Flooding Attack, Spoofing, Wireless Mesh Networks.

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Divya Bansal ¹, Sanjeev Sofat ¹

Affiliations
1 Computer Science & Engineering, Punjab Engineering College, Chandigarh, IN

Abstract

Unlike wired networks, wireless networks do not have well-defined physical boundaries, which makes them prone to several security threats. As various wireless networks evolve into the next generation to provide better services, a key technology in the form of wireless mesh networks (WMNs) has emerged recently. Wireless Mesh Networks hold the promise of facilitating large-scale community networks in complex environments. There are number of issues in deploying WMNs, amongst others, security is a very serious issue. In these and other vital or security-sensitive deployments, keeping the network available for its intended use is essential. Without proper security mechanisms, networks will be confined to limited, controlled environments, negating much of the promise they hold. One of the major loop-holes in the security of WMNs is that management frames are not authenticated, and hence can be easily spoofed to cause DoS or Denial of Service attacks. We analyze the existing schemes and the proposed 802.11w draft to authenticate Disassociation and Deauthentication management frames. In this paper an amendment to the draft of 802.11w is proposed that can be used to prevent DoS attacks over 802.11i security standard. Further specific DoS attacks that that cannot be solved by the proposed draft are also analyzed in this paper.

Keywords

Wireless Mesh Networks, Denial of Service, 802.11w, 802.11i, NAV, Disassociation, Deauthentication.

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Kunwar Pal ¹, Divya Bansal ¹

Affiliations
1 Department of Computer Science and Engineering, PEC, University of Technology, IN

Abstract

In this paper we are presenting the simulation analysis of the secure OLSR (Optimized Link State Routing Protocol) in mobile ad-hoc network. The security scheme provides the security in two parts in which the hash chain or the encryption algorithm is used. For protecting the TC message we are using the HASH chain and for the hello message encryption algorithm is used. The approach provides the better security than the existing OLSR. And the simulation results show that the approach is more secure and efficient than the real OLSR in case of attacker node. And the SOLSR provides the more security in the case of malicious activities in the network. The security scheme provides the, node to node authentication as well as sender to receiver authentication. The security scheme is so easy, so easily can be implemented on the other proactive routing protocols also.

Keywords

OLSR Protocol, HASH Chain, SHA Algorithm, Encryption Algorithm, AES.

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Ashutosh Gupta ¹, Aditya Ganeshpurkar ¹, Divya Bansal ¹, Nazneen Dubey ¹

Affiliations
1 Shri Ram Institute of Technology-Pharmacy, Jabalpur, M.P, IN

Abstract

Various pathological conditions in thebodyare observed as a result of cellular damage. Damage to erythrocytes makes them less capable of carrying oxygen. Some therapeutic agents are known to cause lysis of erythrocytes. In the present study, ferulic acid was used to assess protective effects on erythrocytes against various hemolytic insults. Experimental models viz. hemoglobin- induced linoleic acid peroxidation, H₂O₂ induced hemolysis and CuOOH-induced hemolysis were used to study theprotective effect of ferulic acid. Ferulic acid demonstrated concentration-dependent inhibition in the experimental models. In all the three cases, maximum inhibition of hemolysis was observed at 250 μg/ml of ferulic acid. The study establishes ferulic acid as apotential antihemolytic agent.

Keywords

Erythrocytes, Oxidative Stress, Antioxidant, Ferulic Acid.

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Divya Bansal ¹, Sanjeev Sofat ¹

Affiliations
1 Department of Computer Science & Engineering, PEC University of Technology, Chandigarh, IN

Abstract

As various wireless networks evolve into the next generation to provide better services, a key technology, wireless mesh networks (WMNs), has emerged recently. There are number of issues in the deployment of WMNs. Amongst others security is quite a serious issue. Authenticating the users and devices in the network is a key point of network security. IEEE 802.11s mesh networks do not have any well defined or specified security architecture which can cater to large number of diversified applications. As the major characteristic of WMNs is multihop therefore using the 802.11i as the security standard is inadequate to provide security in Wireless Mesh Networks primarily because 802.11i was designed with the central security mechanism. In this paper a new approach using threshold authorization model with Clustered Certificate Authority is proposed which caters to the best of both the centralized and distributed architecture.

Keywords

Wireless Mesh Networks, Threshold Authorization, Secret Key Sharing.

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Dipica Ramchandani ¹, Aditya Ganeshpurkar ¹, Divya Bansal ², Manvendra Singh Karchuli ³, Nazneen Dubey ¹

Affiliations
1 Drug Discovery Laboratory, Shri Ram Institute of Technology-Pharmacy, Jabalpur, IN
2 Pharmaceutics Research Laboratory, Shri Ram Institute of Technology-Pharmacy, Jabalpur, IN
3 Pinnacle Biomedical Research Institute, Bhopal, MP, IN

Abstract

Free radicals are one of the frequent products of normal cellular metabolism. Disparity of metabolism and excessive generation of free radicals predisposes to disorders like Parkinson’s disease, Alzheimer’s disease, and aging phenomenon. Curculigo orchioides Gaertn. is known for “adaptogen” and “aphrodisiac” activity and has been proved for antiasthmatic, estrogenic, antiosteoporotic activity along with protection from cisplatin‑induced cell damage. C. orchioides was powdered and subjected to soxhlet extraction using methanol. Phytochemical studies and estimation of polyphenols and flavonoids was performed. Acute toxicity studies were performed by Organization for Economic Cooperation and Development OECD guidelines. Animals were treated with cyclophosphamide to induce neurotoxicity. Curculigo orchioides was powdered and subjected to soxhlet extraction using methanol. Catalase, superoxide dismutase, glutathione peroxidase, and lipid peroxidation were estimated by reported methods. C. orchioides (400 mg/kg) significantly promoted restoration of catalase (P < 0.005), superoxide dismutase (P < 0.005), and glutathion (P < 0.05) levels. Similarly, a very significant decrease (P < 0.005) in the levels of malondialdehyde was observed. In all cases as mentioned previously, C. orchioides at dose 200 mg/kg promoted significant (P < 0.05) restoration of enzyme levels. C. orchioides (Kali Musli) is rich source of phytochemicals like flavonoids and polyphenols. Flavonoids and polyphenols are reputed to demonstrate neuroprotective effect. These phytochemicals in the present study might be responsible to demonstrate neuroprotective effect.

Keywords

Antioxidant enzymes, brain, Curculigo orchioides, neuroprotective

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