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international conference on security in computer networks and distributed systems, snds 2012

作者： Chandavale, Anjali Avinash Sapkal, A. LMIETE India

ISBN: (纸本)9783642341342

CAPTCHAs (Completely Automated Public Turing test to tell computers and Humans Apart) are widespread security measures on the World Wide Web that prevent automated programs from abusing online services. CAPTCHAs are designed to be easy for humans but hard for machines. Academic research into CAPTCHAs takes the form of a friendly 'arms race', with some researchers acting as 'malicious users' that try to attack and defeat the latest CAPTCHA systems automatically. Defeating a CAPTCHA requires two procedures: segmentation and recognition. Recent research shows that the problem of segmentation is much harder than recognition. The efforts to break the CAPTCHA determine its strength & thus in turn help the researcher to build stronger CAPTCHA. In order to test the strength of a particular CAPTCHA, in this paper, we have developed a universal algorithm that measures one of the parameters to measure strength of CAPTCHA. The proposed algorithm can adapt to various cases for segmenting characters from CAPTCHA image. The said algorithm is inspired from projection value of characters, concept of snake game and typical patterns of touching the characters. Experimental results prove that the proposed algorithm has improved correct segmentation rates giving accuracy of 85%. © 2012 Springer-Verlag.

关键词： Network security

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Lightweight cryptographic primitives for mobile ad hoc networks

Lightweight cryptographic primitives for mobile ad hoc netwo...

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international conference on security in computer networks and distributed systems, snds 2012

作者： Kumar, Adarsh Aggarwal, Alok Computer Science Engineering and Information Technology Department Jaypee Institute of Information Technology Noida India

ISBN: (纸本)9783642341342

The tight computing constraints of low capacity mobile devices require lightweight cryptographic implementations.A software and hardware based performance analysis of cryptographic primitives: lightweight encryption/decryption, lightweight key exchange and lightweight authentication using hashing mechanism are conducted in this work. The parameters taken for software comparison are: high throughput, minimum delay and for hardware are: minimum gate equivalents (GE) and minimum power consumption. Cryptographic primitives are combined using two scenarios: (i) authentication to plaintext and confidentiality to message-to-send and (ii) confidentiality to plaintext and authentication to message-to-send. Two combinations are having similar results comparisons but authentication to plaintext and confidentiality to message-to-send is more meaningful. Furthermore, these two combinations provide implementation of cryptographic primitives with 30% of total GE at 52 μW. Thus, these are two complete cryptographic solutions with ultra-lightweight features which are suitable for extremely resource constraint environments such as mobile sensor devices. © 2012 Springer-Verlag.

关键词： Authentication

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A security Framework for Multi-authority Based e-Sealed Bid Auction System

A Security Framework for Multi-authority Based e-Sealed Bid ...

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2nd international conference on security in computer networks and distributed systems, snds 2014

作者： Sinha, Sourav Jenamani, Mamata Department of Industrial Engineering and Management Indian Institute of Technology Kharagpur India

ISBN: (纸本)9783642545245

In a typical organization multiple authorities may participate in purchasing process. Online implementation of such system should properly distribute security control over multiple-authorities to ensure trust among them and avoid dispute. In our research we are presenting two aspects of e-sealed bid auction in a two server setting using public key infrastructure: First, secure bid submission and bid opening using multiple authorities, and second, secure bid document storage for future references. © Springer-Verlag Berlin Heidelberg 2014.

关键词： Purchasing

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Efficient Weighted innovative Routing Protocol (EWiRP) to balance load in Mobile Ad Hoc networks (MANETs): Simulation and feasibility analysis

Efficient Weighted innovative Routing Protocol (EWiRP) to ba...

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international conference on security in computer networks and distributed systems, snds 2012

作者： Goel, Nitin Sangwan, Shruti Jangra, Ajay Associate-Solutions Decimal Technologies Pvt. Ltd. Gurgaon Haryana India CSE Department UIET Kurukshetra University Kurukshetra Haryana India

ISBN: (纸本)9783642341342

Mobile Ad Hoc networks (MANETs) are vulnerable to having their optimality in variety of operations and calculations, compromised by various challenges. After an analysis on MANET routing, a load balancing and resource aware routing protocol is proposed which evaluates the routes with node's residual energy, load information and computes delay along multiple paths for different service classes of the network? In this paper the evaluation results are presented that demonstrate the operation of Efficient Weighted innovative Routing Protocol (EWiRP) in mobile ad hoc environments. Simulations with EWiRP over AODV (single path) and MAODV (multipath), shows that the proposed scheme has a potential to improve performance significantly with respect to the aggregated throughput, jitter, end to end delay and delivery ratio. The proposed EWiRP algorithm intended for a variety of scenarios without much control overhead as the simulation study is performed by taking 25 and 50 nodes over different grid areas. © 2012 Springer-Verlag.

关键词： Routing protocols

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Provably secure single sign-on scheme in distributed systems and networks

Provably secure single sign-on scheme in distributed systems...

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11th IEEE international conference on Trust, security and Privacy in Computing and Communications, TrustCom-2012

作者： Yu, Jiangshan Wang, Guilin Mu, Yi Center for Computer and Information Security Research School of Computer Science and Software Engineering University of Wollongong Australia

ISBN: (纸本)9780769547459

distributed systems and networks have been adopted by telecommunications, remote educations, businesses, armies and governments. A widely applied technique for distributed systems and networks is the single sign-on (SSO) which enables a user to use a unitary secure credential (or token) to access multiple computers and systems where he/she has access permissions. However, most existing SSO schemes have not been formally proved to satisfy credential privacy and soundness of credential based authentication. To overcome this drawback, we formalise the security model of single sign-on scheme with authenticated key exchange. Specially, we point out the difference between soundness and credential privacy, and define them together in one definition. Also, we propose a provably secure single sign-on authentication scheme, which satisfies soundness, preserves credential privacy, meets user anonymity, and supports session key exchange. The proposed scheme is very efficient so that it suits for mobile devices in distributed systems and networks. © 2012 IEEE.

关键词： Authentication

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distributed ROUTING AND RELAY MANAGEMENT IN MOBILE PACKET RADIO networks.

Proceedings - IEEE Computer Society International Conference

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Proceedings - IEEE computer Society international conference 1980年 235-243页

作者： Liu, Jane W.S.

This report contains an analysis of the current states of art in the areas of vehicle location techniques, traffic handling protocols, network stability control, and security/authentication schemes. In particular, performance limitation of vehicle location systems operating in the ADDS network environment is discussed. A distributed architecture of automatic vehicle monitoring system is suggested. Arguments supporting the adoption of Transmission Control Program (TCP) and CCITT X. 25 in ADDS are presented. Routing and relay management schemes needed to support these subscriber-level protocols in distributed manner are designed. The different network stability problems are defined and their solutions discussed.

关键词： computer networks

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Collaborative Approach for Data Integrity Verification in Cloud Computing

Collaborative Approach for Data Integrity Verification in Cl...

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2nd international conference on security in computer networks and distributed systems, snds 2014

作者： Saxena, Rajat Dey, Somnath Department of Computer Science and Engineering Indian Institute of Technology Indore India

ISBN: (纸本)9783642545245

High security is one of leading restriction for shining up bright eras and vision of Cloud computing. In latest trend of Cloud, all the sensitive applications and data are moved towards cloud infrastructure and data center which run on virtual computing resources in the form of virtual machine. The large scale usage of virtualization to achieve cloud infrastructure brings additional security burden for tenants of a public cloud service. In this paper, we primarily aim to achieve better data integrity verification technique and help users to utilize Data as a Service (Daas) in Cloud computing. The experimental results are included in order to show the effectiveness of the proposed method for data integrity verification. © Springer-Verlag Berlin Heidelberg 2014.

关键词： Cloud security

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Publicly auditable provable data possession scheme for outsourced data in the public cloud using polynomial interpolation

Publicly auditable provable data possession scheme for outso...

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international conference on security in computer networks and distributed systems, snds 2012

作者： Purushothama, B.R. Amberker, B.B. Department of Computer Science and Engineering National Institute of Technology Warangal Andhra Pradesh 506004 India

ISBN: (纸本)9783642341342

Cloud computing paradigm provides computing and storage infrastructure for the clients to outsource their data and computation. This new computing paradigm poses several security challenges. We focus on the problem of checking the possession of data by the untrusted cloud storage server. We design publicly auditable provable data possession scheme using polynomial interpolation technique. In our scheme, the client can delegate the task of verification to the Third Party Auditor. Interestingly, the client will not use any secret to compute the public metadata and client or Third Party Auditor need not to maintain any metadata for the verification of the proof. The verifier can verify the proof using public metadata and a random key kept secret for the challenge. We have focused on reducing the size of the proof returned by the cloud server to save the network bandwidth. We have defined the security and proved the security of the scheme under the group satisfying Computational Diffie Hellman assumption against a cheating cloud server. In the proposed scheme, the verifier can make unlimited number of data possession challenges to the server. © 2012 Springer-Verlag.

关键词： Metadata

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Secure leader election algorithm optimized for power saving using mobile agents for intrusion detection in MANET

Secure leader election algorithm optimized for power saving ...

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international conference on security in computer networks and distributed systems, snds 2012

作者： Darji, Monika Trivedi, Bhushan L.J Institute of Computer Application Ahmedabad India GLS Institute of Computer Technology Ahmedabad India

ISBN: (纸本)9783642341342

In this paper we reduce the communication and computation overhead involved in Leader Election for running Intrusion Detection System (IDS) for a cluster of nodes in mobile ad hoc networks using Mobile Agents. To reduce the performance overhead of IDS, a leader node is elected to handle intrusion detection service for the whole cluster. If the cluster head selection is random, it might be possible that resource consumption of the leader is higher and it might just lose all its power. Thus overall lifetime of cluster reduces to lesser than useful lifetime. It is clear that such methods have no guarantee to work. The solution requires balancing the resource consumption among all the nodes and thus increase the overall lifetime of a cluster by electing the most cost- efficient node. We will call it leader-IDS. Our contribution to the election scheme is to design an algorithm which uses mobile agents to gather resource information from all the cluster nodes and use it to elect leader in optimum and secure manner. © 2012 Springer-Verlag.

关键词： Mobile agents

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Providing secrecy in key management protocols for large wireless sensors networks

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Ad Hoc networks 2003年第4期1卷 455-468页

作者： Pietro, Roberto Di Mancini, Luigi V. Jajodia, Sushil Dipartimento di Informatica Univ. di Roma La Sapienza Via Salaria 113 00198 Roma Italy Ctr. for Secure Information Systems George Mason University University Drive VA 22030 United States

This paper defines a new protocol KeEs for the key establishment that meets the security requirements of the threat model proposed. The KeEs protocol assures forward and backward secrecy of the session key, so that if any set of the session keys is compromised, even including the current session key, these compromised keys do not undermine neither the security of future session keys, nor the security of past session keys. We illustrate the protocol in two different scenarios, one in which a Base Station acts as a synchronizer for re-keying the sensors, and a second scenario based on a completely distributed approach where the sensors rely only on themselves to achieve synchronization in the re-keying process. For both scenarios the KeEs protocol requires minimal overhead in terms of computations and transmissions. Finally, in KeES none of the resources needed by a generic sensor is bounded to the size of the WSN. © 2003 Elsevier B.V. All rights reserved.

关键词： Telecommunication networks

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