Entity

Time filter

Source Type

Pauri, India

Singh R.,Gb Pant University | Sharma T.P.,National Institute of Technology Hamirpur
Journal of Location Based Services | Year: 2015

WLANs are prone to flooding denial-of-service (DoS) attacks. Present research work proposes a novel method to enhance WLAN security by restricting flooding DoS effect on the access point (AP). Each node in the proposed method listens transmission of other neighbouring nodes and sends at regular interval a linked list to AP, containing the identifiers (IDs) of all nodes from which it hears. AP stores the linked list information and runs location-based coordinate calculation (LBCC) algorithm. LBCC finds the expected coordinates of each node and probable location area with the expected coordinates as centre. Flooding DoS attack by the attacker is restricted at the AP using node’s probable location area. The method is validated by simulation experimentations with varying topologies. Further, geometrical analysis of the method is also provided. © 2016 Taylor & Francis.


Singh V.K.,Gb Pant University
Journal of Materials and Environmental Science | Year: 2013

In the present work walnut particles reinforced (10%wt-40%wt) epoxy matrix composite was fabricated in open mould. Physical property-density and Mechanical property-tensile properties have been evaluated. Role of particle wt% reinforcement observed for density and tensile properties-ultimate tensile strength, modulus of elasticity and % elongation. Increase of wt % of walnut particle from 10%wt to 20%wt was very much effective for loss in ultimate tensile strength and gain in % elongation, in comparison to increase in 20-40% wt. Effect on modulus of elasticity was almost consistent.


Singh R.,Gb Pant University | Sharma T.P.,National Institute of Technology Hamirpur
Proceedings - 4th IEEE International Conference on Computer and Communication Technology, ICCCT 2013 | Year: 2013

Authentication per frame is an implicit necessity for security in Wireless LANs (Local Area Networks). 802.11i security framework proposes encryption and MIC based authentication of data frames. In this, the key is not refreshed every time a frame is sent. For refreshing the key entities explicitly perform a 4-way handshake to evaluate PTK. 4-way handshake also ensures that involved entities have the same transient key (refreshed key). 4-way handshake involves computation cost. It also adds to the communication cost in the wireless environment, as data frame are utilized for this purpose. 4-way handshake in the 802.11i framework happens to be prone to DoS attacks (especially due to first message of the 4-way handshake). We propose a novel per frame key refreshing method that do away with the 4-way handshake. It does not require extra bits or extra frame for this purpose and also no change in the existing frame format is required. It uses existing key, frame sequence number along with the authentication stream generator for key refreshing. © 2013 IEEE.


Longvah T.,National Institute of Nutrition | Toteja G.S.,Indian Council of Medical Research | Bulliyya G.,Regional Medical Research Center | Raghuvanshi R.S.,Gb Pant University | And 3 more authors.
Food Chemistry | Year: 2012

Universal salt iodisation programme is recognised as an economical, convenient and effective means of preventing iodine deficiency disorders (IDD). However, information on the retention of iodine during cooking is scant. Therefore this study was undertaken to investigate the retention of iodine from iodised salt when added to the most commonly used Indian recipes. The Mean ± SD retention of iodine in 140 of the most common Indian recipes was 60 ± 21%. The frequency distribution showed low retention (<20%) of iodine in 5.7% of the recipes, moderate retention (20-40%) in 15.7% while very high retention (>80%) was observed in 20%. Significant correlation (r = -0.194, P < 0.05) was observed between iodine retention and the time of iodised salt addition to the recipe. The retention of iodine was observed to be a minimum in shallow frying with oil (52 ± 23%) and a maximum in pressure cooking (82.2 ± 6.2%). The data generated in this study would usefully augment the negligible information regarding iodine retention in recipes. © 2011 Elsevier Ltd. All rights reserved.


Singh R.,Gb Pant University | Sharma T.P.,National Institute of Technology Hamirpur
IFIP International Conference on Wireless and Optical Communications Networks, WOCN | Year: 2013

Authentication and integrity per frame is an implicit necessity for security in Wireless LANs (Local Area Networks). The existing security frameworks (WPA, 802.11i) provide message integrity code (MIC) for maintaining the integrity and authentication for each data frame. MIC is kept in separate field in the frame and hence adds to the communication overhead. We propose a novel sequence number based scheme to reduce the MIC overhead in the WLANs. The scheme provides per frame message integrity and authentication. It requires only trivial operations like hash evaluation, XOR and addition. It does not require extra bits or extra frame for this purpose and also no change in the existing frame format is required. © 2013 IEEE.

Discover hidden collaborations