Mobile Information Systems - Volume 8, issue 3

Authors: You, Ilsun | Yim, Kangbin | Barolli, Leonard

Article Type: Other

DOI: 10.3233/MIS-2012-0137

Citation: Mobile Information Systems, vol. 8, no. 3, pp. 173-175, 2012

Authors: Jara, Antonio J. | Zamora, Miguel A. | Skarmeta, Antonio

Article Type: Research Article

Abstract: The Internet of Things (IoT) requires scalability, extensibility and a transparent integration of multi-technology in order to reach an efficient support for global communications, discovery and look-up, as well as access to services and information. To achieve these goals, it is necessary to enable a homogenous and seamless machine-to-machine (M2M) communication mechanism allowing global access to devices, sensors and smart objects. In this respect, the proposed answer to these technological requirements is called Glowbal IP, …which is based on a homogeneous access to the devices/sensors offered by the IPv6 addressing and core network. Glowbal IP's main advantages with regard to 6LoWPAN/IPv6 are not only that it presents a low overhead to reach a higher performance on a regular basis, but also that it determines the session and identifies global access by means of a session layer defined over the application layer. Technologies without any native support for IP are thereby adaptable to IP e.g. IEEE 802.15.4 and Bluetooth Low Energy. This extension towards the IPv6 network opens access to the features and methods of the devices through a homogenous access based on WebServices (e.g. RESTFul/CoAP). In addition to this, Glowbal IP offers global interoperability among the different devices, and interoperability with external servers and users applications. All in all, it allows the storage of information related to the devices in the network through the extension of the Domain Name System (DNS) from the IPv6 core network, by adding the Service Directory extension (DNS-SD) to store information about the sensors, their properties and functionality. A step forward in network-based information systems is thereby reached, allowing a homogenous discovery, and access to the devices from the IoT. Thus, the IoT capabilities are exploited by allowing an easier and more transparent integration of the end users applications with sensors for the future evaluations and use cases. Show more

Keywords: Internet of Things, machine to machine, 6LoWPAN, address management, global communications, end-to-end addressability

DOI: 10.3233/MIS-2012-0138

Citation: Mobile Information Systems, vol. 8, no. 3, pp. 177-197, 2012

Authors: Palmieri, Francesco | Castiglione, Aniello

Article Type: Research Article

Abstract: The provision of efficient broadcast containment schemes that can dynamically cope with frequent topology changes and limited shared channel bandwidth, is one of the most challenging research topics in MANETs, and is crucial to the basic operations of networks serving fully mobile devices within areas having no fixed communication infrastructure. This problem particularly impacts the design of dynamic routing protocol that can efficiently establish routes to deliver data packets among mobile nodes with minimum communication …overhead, and at the same time, ensure high throughput and low end-to-end delay. Accordingly, this work exploits and analyzes an adaptive probabilistic broadcast containment technique based on a particular condensation phenomenon borrowed from Quantum Mechanics and transposed in self-organizing random networks, that has the potential to effectively drive the on-demand route discovery process. Simulation-based performance analysis has shown that the proposed technique can introduce significant benefits on the general performance of broadcast-based reactive routing protocols in MANETs. Show more

Keywords: Mobile ad-hoc networks, probabilistic broadcast, Bose-Einstein condensation, reactive routing protocols

DOI: 10.3233/MIS-2012-0140

Citation: Mobile Information Systems, vol. 8, no. 3, pp. 199-211, 2012

Authors: Zhang, Xingjun | Jing, Cuiping | Tang, Feilong | Fowler, Scott | Cui, Huali | Dong, Xiaoshe

Article Type: Research Article

Abstract: In this paper a novel unequal packet loss protection scheme R2NC based on low-triangular global coding matrix with ladder-shaped partition is presented, which combines redundant and random network coding for robust H.264/SVC video transmission. Firstly, the error-correcting capabilities of redundant network coding make our scheme resilient to loss. Secondly, the implementation of random network coding at the intermediate nodes with multiple input links can reduce the cost of network bandwidth, thus reducing the …end-to-end delay for video transmission. Thirdly, the low-triangular global coding matrix with ladder-shaped partition is maintained throughout the R2NC processes to reduce the impact of global coding matrix's rank deficiency on video transmission and provide unequal erasure protection for H.264/SVC priority layers. The redundant network coding avoids the retransmission of lost packets and improves error-correcting capabilities of lost packets. Based only on the knowledge of the packet loss rates on the output links, the source node and intermediate nodes can make decisions for redundant network coding and random network coding (i.e., how much redundancy to add at this node). However, the redundancy caused by redundant network coding makes the network load increases. In order to improve network throughput, we performed random network coding at the intermediate nodes. Our approach is grounded on the overall distortion of reconstructed video minimization by optimizing the amount of redundancy assigned to each layer. The convex optimization model is constructed under the constraint of network coding and scalable video coding. Experimental results are shown to demonstrate the significant improvement of H.264/SVC video reconstruction quality with R2NC over packet lossy networks. Show more

Keywords: Network coding, scalable video coding, low-triangular global coding matrix with ladder-shaped partition, unequal error protection

DOI: 10.3233/MIS-2012-0139

Citation: Mobile Information Systems, vol. 8, no. 3, pp. 213-230, 2012

Authors: Shen, Yao | Wang, Minjie | Tang, Xiaoxin | Luo, Yi | Guo, Minyi

Article Type: Research Article

Abstract: Context-awareness has become a key issue in Human-Computer Interaction(HCI) to provide better user experience under multi-device and multi-modal environment. With this intuition, we have proposed a web service based framework, which associates interactions with services, and provided service selection mechanism using context knowledge to achieve smart interaction migration [1]. A fundamental problem of such a service-oriented framework for interaction migration is to design an effective while scalable algorithm for service selection. In …this paper, we propose a service selection algorithm considering not only context information and user preferences but also inter-service relations such as relative location. Our algorithm detects interaction hot spots within user active scope and presents the best service combination based on evaluation of interaction effectiveness. We also conduct simulation and the results illustrate that our algorithm is effective and scalable for interaction service selection. Show more

Keywords: Human-computer interaction, interaction migration, multi-modal interaction, pervasive computing

DOI: 10.3233/MIS-2012-0141

Citation: Mobile Information Systems, vol. 8, no. 3, pp. 231-254, 2012

Authors: Cao, Dan | Zhao, Baokang | Wang, Xiaofeng | Su, Jinshu

Article Type: Research Article

Abstract: Attribute-based signature (ABS) is a new cryptographic primitive, in which a signer can sign a message with his attributes, and the verifier can only known whether the signer owns attributes satisfying his policy. Moreover, the signature cannot be forged by any user not having attributes satisfying the policy. ABS has many applications, such as anonymous authentication, and attribute-based messaging systems. But many applications may require a user obtaining attributes from different authorities, which calls for …multi-authority ABS schemes. In this paper, we first propose a multi-authority ABS scheme, called TR_MABS, adopting an attribute tree to support expressive policy consisting of AND, OR, threshold gates. As TR_MABS brings in expensive cost on adding or removing attribute authorities, we present another multi-authority ABS scheme, named DNF_MABS, which uses a disjunctive normal form (DNF) to express a policy, bringing in the capability of implementing NOT gate. To prevent collusion attack, we adopt a unique global identity (GID) for a user to combine his attribute keys and identity. Moreover, we use a central authority to assure the usability of attribute keys a user getting from different attribute authorities, make the verification independent of user's identity, and allow attribute authorities' dynamic change. Our schemes fit the requirements of applications, and also distribute the trust to authorities in the system. In addition, we prove the security of our schemes under computational Diffie-Hellman assumption. Show more

Keywords: ABS, multi-authority, trust, policy, tree, DNF, GID, central authority

DOI: 10.3233/MIS-2012-0142

Citation: Mobile Information Systems, vol. 8, no. 3, pp. 255-274, 2012

Authors: Choi, Jun-Ho | Choi, Chang | Ko, Byeong-Kyu | Kim, Pan-Koo

Article Type: Research Article

Abstract: Large parts of attacks targeting the web are aiming at the weak point of web application. Even though SQL injection, which is the form of XSS (Cross Site Scripting) attacks, is not a threat to the system to operate the web site, it is very critical to the places that deal with the important information because sensitive information can be obtained and falsified. In this paper, the method to detect themalicious SQL injection script code which …is the typical XSS attack using n-Gram indexing and SVM (Support Vector Machine) is proposed. In order to test the proposed method, the test was conducted after classifying each data set as normal code and malicious code, and the malicious script code was detected by applying index term generated by n-Gram and data set generated by code dictionary to SVM classifier. As a result, when the malicious script code detection was conducted using n-Gram index term and SVM, the superior performance could be identified in detecting malicious script and the more improved results than existing methods could be seen in the malicious script code detection recall. Show more

Keywords: Malicious code, SQL injection attack, n-Gram, SVM

DOI: 10.3233/MIS-2012-0143

Citation: Mobile Information Systems, vol. 8, no. 3, pp. 275-286, 2012