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Cloud computing has emerged as an exciting new computing paradigm offering organizations and businesses the flexibility of scaling their compute resource usage, without having to worry about under or over-provisioning. It also enables services to be deployed and utilized in a seamless manner facilitating new developments in the pay-per-use domain by incorporating elements of utility computing and...
Sophisticated and evolving CAPTCHA breaking algorithms as mentioned in [(K. Chellapilla et al., 2004), (G. Mori et al., 2003), (J. Yan et al., 2008)] have successfully broken currently employed CAPTCHAs. This has resulted in a continuous requirement for more robust CAPTCHAs. In light of this, STC generation scheme was introduced in (A. Gupta et al., 2009) to stay secure for a long time. In this paper,...
In any vehicular adhoc network, there is always a possibility of incorrect messages being transmitted either due to faulty sensors and/or intentional malicious activities. Detecting and evicting sources of such misbehavior is an important problem. We observe that the performance of misbehavior detection schemes will depend on the application under consideration and the mobility dynamics of the detecting...
Authentication by biometric verification is becoming increasingly common in corporate, public security and other such systems. There is scads of work done in the area of offline palmprints like palmprint segmentation, crease extraction, special areas, feature matching etc. But to the best of our knowledge no work has been done yet to extract and identify the right hand of a person, given his/her left...
Steganography is the science of writing hidden messages in such a way that no one apart from the sender and intended recipient even realizes if there is any hidden message. Most of the research done before in this area is focussed on images, audios, and videos but a less amount of work has been done on MS Word documents which is identified with certain shortcomings. One of the major shortcoming in...
Peer-to-peer (P2P) networks are vulnerable to Distributed Denial-of-Service (DDoS) attacks, which cause invalid packets to be flooded through the P2P network, preventing valid packets from being delivered. This causes a disruption of the services provided by the P2P network. Since, anonymity and lack of centralized control/censorship are the salient features of P2P networks; it often encourages malicious...
In this paper, we propose a new security metric for measuring resilience of a symmetric key distribution scheme in wireless sensor network. A polynomial-based and a novel complete connectivity schemes are proposed and an analytical comparison, in terms of security and connectivity, between the schemes is shown. Motivated by the schemes, we derive general expressions for security and connectivity....
In many applications of sensor networks, security is a very important issue. To be resistant against the various attacks, nodes in a sensor network can establish pairwise secret keys, authenticate all communications with cryptographic functions, and also apply secure information aggregation schemes or hop-by-hop filtering methods. However, these security measures can take considerable overhead in...
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