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SAI Computing Conference (SAI)

作者： Gupta, Sunil Gabrani, Goldie BML Munjal Univ Sch Engn & Technol Gurgaon Haryana India

ISBN: (纸本)9781467384605

The Grid environment is highly dynamic in nature where a variety of users from all over the world try to access the resources that are again distributed all over. Both the users and resources are highly varied. The users can be both valid and invalid, can have single job or multiple jobs, and can have jobs that can have different processing requirements, may be an old loyal user or may be a new one. Similarly the resources can have different characteristics like the processing speed, number of processing elements each resource has, whether the resources have joined or left the grid and so on. In such an environment if an un-authorized user is allowed to access the resource, there is a security threat to the grid. Even if one unauthorized user is allowed to access the grid;the whole grid becomes susceptible to many security threats. So resources should only be available to authorized users. Moreover, as number of users and their jobs increases, they face a lot of competition amongst themselves to get access to the resources. In order to solve the conflicts the resources must be allocated to the users by some arbitration mechanism. In this paper we propose a grid framework that focusses on solving these two major problems namely authentication and arbitration by means of using a robust authentication mechanism and by assigning priority to users and their jobs. In order to achieve secure resource allocation to valid user jobs for maximum resource utilization along with minimizing waiting time and elapsed time of jobs, a secure resource allocation scheme using ECC algorithm with two-level priority has been proposed. The results have been compared with a non-priority based system and our proposed system shows substantial improvement in both waiting time and elapsed time of jobs with better resource utilization.

关键词： Grid Job scheduler Authentication Elliptic Curve Cryptography digital signature algorithm Priority Finish time Elapsed time Waiting time

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signature BASED DATA AUDITING UNDER MOBILE CLOUD SYSTEM

SIGNATURE BASED DATA AUDITING UNDER MOBILE CLOUD SYSTEM

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Global Conference on Communication Technologies (GCCT)

作者： Shiny, R. Shaji, R. S. Jayan, J. P. Noorul Islam Univ Dept Software Engn Kumaracoil Tamil Nadu India Noorul Islam Univ Dept IT Kumaracoil Tamil Nadu India

ISBN: (纸本)9781479985531

Cloud computing is getting more popular in the field of computer science because of its reliability in storing and assessing data remotely. In the presence scenario it is very biter to have mobile devices as an interface between user and server, to access and store data for one's need. Mobile technology in cloud computing is helps users to operate on the data for any of the application for their organization in mobility. In these aspects mobile cloud computing is our current topic of interest as it is very necessary to protect the data in storage and access since the transportation of the data is through mostly by public network. In this project the mobile cloud environment is used for storing and assessing data and thus it is needed to have an efficient cloud network that is a framework for communication and data authentication. For authentication it is vital to design a security framework for mobile cloud environment that ensures better authentication of data in the mobile devices and in the storage devices. We propose a new security framework for receiving of data using the concept of digital signature.

关键词： Cryptography digital signature algorithm Cloud Service Provider Hash Message digest

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Acknowledgement security for MANET using EAACK 1

Acknowledgement security for MANET using EAACK

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International Conference on Green Computing and Internet of Things (ICGCIoT)

作者： Suvarna, Deore Pallavi, Erande Sumitra, Lahane Chhaya, Dhatrak Korade, Mahesh Savitribai Phule Pune Univ Dept Comp Engn Sandip Inst Technol & Res Ctr Pune Maharashtra India

ISBN: (纸本)9781467379106

Assembling of wireless mobile equipments which form a network beyond the existing infrastructure is the Mobile Ad-hoc Network. These nodes contracted to communication one another. As nodes from MANET can be connect with one another if and only if all are the nodes are in the corresponding range, if it not then message relay on the neighboring or intermediate nodes between sender and receiver. We have utilized different algorithm such as digital signature and Clustering algorithm for routing information. MANET have ability of self-configuring therefore which used in various application like military used or emergency recovery. MANET requires security while transferring the data for this purpose new Secure IDS designated Enhanced Adaptive Acknowledgement (EAACK) is especially constructed for MANET. Through EAACK beaten the trouble of misleading misbehavior, finite transmission Range and receiver collisions.

关键词： MANET (Mobile Ad-hoc Network) Adaptive Acknowledgement (AACK) Enhanced Adaptive Acknowledgement (EAACK) digital signature Routing algorithm digital signature algorithm CryptographyTechniques

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A variant of digital signature algorithm

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DESIGNS CODES AND CRYPTOGRAPHY 2009年第1期51卷 99-104页

作者： Poulakis, Dimitrios Aristotle Univ Thessaloniki Dept Math Thessaloniki 54124 Greece

In this paper we present a variant of the digital signature algorithm based on a factorization problem and two discrete logarithm problems. We prove that our signature scheme is at least as secure as the original Digi... 详细信息

关键词： Public key cryptography ElGamal signature digital signature algorithm Discrete logarithm Factorization

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Enhancing Manet Security Using Hybrid Techniques in Key Generation Mechanism

Enhancing Manet Security Using Hybrid Techniques in Key Gene...

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International Conference on Electronics and Communication Systems (ICECS)

作者： Dhanalakshmi, K. S. Kannapiran, B. Divya, A. Kalasalingam Univ Dept ECE Srivilliputhur India Kalasalingam Univ Dept EIE Dept Srivilliputhur India

ISBN: (纸本)9781479966387

Mobile Ad Hoc Network is a infrastructure-less, self-configuring wireless network. These unique characteristics makes it ideal for mission critical applications including Personal Area Networking (PAN), military use, Crisis-management applications such as battle field relief and remote explorations. Due to the de-centralized infrastructure, MANET becomes vulnerable to both passive and active attacks. To address such security challenges, Intrusion Detection System (IDS) is required to detect the malicious attackers before they can accomplish any significant damages to the network. The IDS includes End-to-end feedbacks, Monitoring in promiscuous mode (watchdog), Activity-based overhearing and Reputation based solution. The proposed mechanism, states the adoption of hybrid cryptography techniques to reduce the network overhead, this also solves significant problems of Watchdog mechanism such as receiver collision, partial dropping, limited transmission power and false misbehavior report. A new key exchange mechanism called Instant Key Generation Mechanism (IKGM) is introduced here to eliminate the predistributed keys requirement. Here the key encryption is done at every node to increase the performances against contemporary approaches. It also provides highest malicious behaviour detection rate which does not affect the significant performances of the network.

关键词： Intrusion Detection System digital signature algorithm AACK IKGM

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A User-friendly Authentication Solution using NFC Card Emulation on Android

A User-friendly Authentication Solution using NFC Card Emula...

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IEEE 7th International Conference on Service-Oriented Computing and Applications (SOCA)

作者： Lee, Haw Hong, Wei-Chih Kao, Chia-Hung Cheng, Chen-Mou Natl Taiwan Univ Dept Elect Engn Taipei 10764 Taiwan Feng Chia Univ Dept Comp Sci & Informat Engn Taichung 40724 Taiwan Inst Informat Ind Cloud Syst Software Inst Taipei Taiwan Acad Sinica Res Ctr Informat Technol Innovat Taipei 115 Taiwan

ISBN: (纸本)9781479968336

The security of the authentication scheme plays a more and more important role in today's web service systems as people's daily are increasingly depending on these services and user credentials are collected and stored online. An insecure authentication system will become a great threat for users' privacy. Beside security, usability is also very important for the design of an authentication system. Traditional password-based authentication solutions are often susceptible to various attacks due to the weak passwords chosen by incautious users. This paper illustrates a secure yet simple implementation, which uses digital signature algorithm to authenticate user identities. The proposed design brings usability and convenience to the authentication scheme by taking advantage of the increasingly widespread mobile devices. Full comparisons with existing systems in terms of their security, usability and deployability will also be presented in this paper.

关键词： Authentication Databases Emulation Mobile handsets Public key Servers NFC authentication system host card emulation simulating Authentication negative feedback circuits Mobile phones Public key Servers Methyltestosterone Androids Database digital signature algorithm

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ASIA: Accelerated Secure In-network Aggregation in Vehicular Sensing Networks

ASIA: Accelerated Secure In-network Aggregation in Vehicular...

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Annual IEEE Communications Society Conference on Sensing and Communication in Wireless Networks

作者： Xiao Wang Patrick Tague Carnegie Mellon University

ISBN: (纸本)9781479902286

Vehicular Ad-Hoc Networks (VANETs) can potentially become a sensing platform. In-network aggregation, a fundamental primitive for querying sensory data, has been shown to reduce overall communication overhead at large. To secure data aggregation in VANETs, existing schemes mainly rely on digital signatures. However, generating and verifying such signatures can cause high computational overhead. More importantly, time-consuming verifications lead to the vulnerability to signature flooding attacks in which a receiver cannot timely verify all messages before their respective deadlines. In this paper, we propose ASIA as an Accelerated Secure In-network Aggregation strategy that can accelerate message verifications and significantly reduce computational overhead while retaining satisfactory security. We replace the most common tree graph with a directed acyclic graph as the aggregation structure. Resulting redundancy in information flow offers the opportunity for misbehavior detection. Meanwhile, by leveraging time asymmetry, upstream nodes in the structure can verify downstream messages through the modified light-weight TESLA scheme. We analyze the security properties of ASIA and provide evaluation results. We show that ASIA can largely accelerate message verifications and drastically reduce computational and communication overhead compared to existing schemes using the resource-consuming Elliptic Curve digital signature algorithm.

关键词： Asia Tree graphs digital signature algorithm Secure Messages Directed Acyclic Graph unified retrieval models information flow

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A Trusted Multi-hop Broadcasting Protocol for Vehicular Ad Hoc Networks

A Trusted Multi-hop Broadcasting Protocol for Vehicular Ad H...

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1st International Conference on Connected Vehicles and Expo

作者： Tian, Daxin Wang, Yunpeng Liu, He Zhang, Xianghong Beihang Univ Beijing Key Lab Cooperat Vehicle Infrastruct Syst Beijing 100191 Peoples R China CPLA Gen Logist Dept Quartermaster Equipment Inst Beijing 100010 Peoples R China

ISBN: (纸本)9780769549002;9781467347051

The vehicular ad hoc networks (VANETs) are characterized by high mobility of nodes, which resulting in frequent and fast changes in the network topologies. To make sure the messages are received efficiently and reliably, particularly for safety applications, broadcasting is the most natural and promising approach. Besides the efficiency, security is another important issue for VANETs. Because the open nature of VANETs make it simple for malicious users to disrupt the system or lead to accidents. In this paper, we propose a PKI-based Multi-hop Broadcasting Protocol (PMBP), which aims at providing authenticated, integrated, non-repudiated vehicular communication. The authentication scheme is based on the Elliptic Curve digital signature algorithm (ECDSA) method. To provide an efficient trusted broadcasting scheme, two strategies are adopted: only the message originator signs the message;one message only be rebroadcasted once by each vehicle. Experimental results prove that this protocol is efficient enough to support safety related vehicular applications.

关键词： broadcasting Spread spectrum communication protocols V2V SAFETY APPLICATION Accidents PGRMC2 gene digital signature algorithm

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Effective generalized equations of secure hyperelliptic curve digital signature algorithms

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The Journal of China Universities of Posts and Telecommunications 2010年第2期17卷 100-108,115页

作者： YOU Lin ,SANG Yong-xuan College of Communication Engineering,Hangzhou Dianzi University,Hangzhou 310018,China [a] College of Communication Engineering Hangzhou Dianzi University Hangzhou 310018 China

A hyperelliptic curve digital signature algorithm （HECDSA） can be viewed as the hyperelliptic curve analogue of the standard digital signature algorithm （DSA）. This article discusses divisor evaluations, the basic HECDSA, variants, two HECDSA equations and a 4-tuple HECDSA scheme, and puts forward a generalized equation for HECDSA. From this generalized equation, seven general HECDSA types are derived based on the efficiency requirements. Meanwhile, the securities of these general HECDSA types are analyzed in detail.

关键词： hyperelliptic curve digital signature algorithm generalized equation hyperelliptic curve discrete logarithm problem

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Some lattice attacks on DSA and ECDSA

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APPLICABLE ALGEBRA IN ENGINEERING COMMUNICATION AND COMPUTING 2011年第5-6期22卷 347-358页

作者： Poulakis, Dimitrios Aristotle Univ Thessaloniki Dept Math Thessaloniki 54124 Greece

In this paper, using the LLL reduction method and computing the integral points of two classes of conics, we develop attacks on DSA and ECDSA in case where the secret and the ephemeral key of a signed message or theirs modular inverses are sufficiently small and in case where the ephemeral keys or theirs modular inverses of two signed messages are sufficiently small.

关键词： Public key cryptography digital signature algorithm Elliptic curve algorithm LLL Discrete logarithm Diophantine equations

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