We propose RACE, a report-based payment scheme for multihop wireless networks to stimulate node cooperation, regulate packet transmission, and enforce fairness. The nodes submit lightweight payment reports (instead of receipts) to the accounting center (AC) and temporarily store indisputable security tokens called Evidences. The reports contain the alleged charges and rewards without security proofs, e.g., […]
Degraded Document Images Binarization Technique
In this paper, we propose a novel document image binarization technique that addresses these issues by using adaptive image contrast. The adaptive image contrast is a combination of the local image contrast and the local image gradient that is tolerant to text and background variation caused by different types of document degradations. In the proposed […]
IMPROVED COLOR BARCODE WITH INTERFERENCE CANCELLATION
we propose a model-based interference cancellation procedure to overcome interference that is computationally inexpensive and provides a significant performance improvement. Specifically, we exploit this spectral diversity to realize a three-fold increase in the data rate by encoding independent data in the C, M, and Y print colorant channels and decoding the data from the complementary […]
A novel method to extract features for iris recognition system
IrisCode, developed by Daugman, in 1993, is the most influential iris recognition algorithm. A thorough understanding of IrisCode is essential, because over 100 million persons have been enrolled by this algorithm and many biometric personal identification and template protection methods have been developed based on IrisCode. This paper indicates that a template produced by IrisCode […]
Secure Management of Personal Health Records by Applying Attribute-Based Encryption
Personal health record (PHR) is an emerging patient-centric model of health information exchange, which is often outsourced to be stored at a third party, such as cloud providers. However, there have been wide privacy concerns as personal health information could be exposed to those third party servers and to unauthorized parties. To assure the patients’ […]
Efficiently achieving data staging and caching in a cloud system
In this paper, we study this data staging problem by leveraging the dynamic programming (DP) techniques to optimally migrate, replicate, and cache the shared data items in cloud systems with or without some practical resource constraints in an efficient way while minimizing the monetary cost for transmitting and caching the data items.To this end, we […]
Optimal Resource Allocation in Self Organizing Clouds
By leveraging virtual machine (VM) technology which provides performance and fault isolation, cloud resources can be provisioned on demand in a fine grained, multiplexed manner rather than in monolithic pieces. By integrating volunteer computing into cloud architectures, we envision a gigantic self-organizing cloud (SOC) being formed to reap the huge potential of untapped commodity computing […]
CLEAN-SLATE ROUTING IN SENSOR NETWORKS
Ad hoc low-power wireless networks are an exciting research direction in sensing and pervasive computing. Prior security work in this area has focused primarily on denial of communication at the routing or medium access control levels. This paper explores resource depletion attacks at the routing protocol layer, which permanently disable networks by quickly draining nodes’ […]
Towards Privacy-Preserving Location proof Updating System
Today’s location-sensitive service relies on user’s mobile device to determine the current location. This allows malicioususers to access a restricted resource or provide bogus alibis by cheating on their locations. To address this issue, we propose A Privacy -Preserving Location proof Updating System (APPLAUS) in which colocated Bluetooth enabled mobile devices mutually generate location proofs […]
A new Distributed Cooperation and Diversity Combining framework in hybrid wireless networks
Our focus is on heterogeneous networks with devices equipped with two types of radio frequency (RF) interfaces: short-range high-rate interface (e.g., IEEE802.11), and a long-range low-rate interface (e.g., cellular) communicating over urban Rayleigh fading channels. Within this framework, we propose and evaluate a set of distributed cooperation techniques operating at different hierarchical levels with resource […]
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