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Large scale distributed systems such as cloud computing applications are becoming very common. These applications come with increasing challenges on how to transfer and where to store and compute data. The most prevalent distributed file systems to deal with these challenges is the Hadoop File System (HDFS) which is a variant of the Google File System (GFS). However HDFS has two potential problems. The first one is that it depends on a single name node to manage almost all operations of every data block in the file system. As a result it can be a bottleneck resource and a single point of failure. The second potential problem with HDFS is that it depends on TCP to transfer data. As has been cited in many studies TCP takes many rounds before it can send at the full capacity of the links in the cloud. This results in low link utilization and longer download times. To overcome these problems of HDFS we present a new distributed file system. Our scheme uses a light weight front end server to connect all requests with many name nodes i.e Triple Security.

Network, Performance, Security, Signature

n Efficient Implementation Of The Digital Signature Algorithm P. Kitsos, N. Sklavos And O. Koufopavlou Vlsi Design Laboratory Electrical and Computer Engineering Department University of Patras. Patras, GREECE E-mail: pkitsos@ee.upatras.gr
[2]. An Introduction to Cryptography and Digital Signatures Author: Ian Curry March 2001 Version 2.0M.M. Amin, .M. Salleh, S. Ibrahim, M.R Katmin (2003), �Information Hiding Using Steganography�, 4th National Conference on Telecommunication Technology Proceeding 2003 (NCTT2003), Concorde Hotel, Shah Alam, Selangor, 14-15 January 2003.
[3]. Nameer N. EL-Emam, Hiding a Large Amount of Data with High Security Using Steganography Algorithm Applied Computer Science Department, Faculty of Information Technology, Philadelphia University, Jordan
[4]. Bellare,M., Miner,S.: A Forward-Secure Digital Signature Scheme. In: Wiener, M. (eds.):
[5]. National Institute of Standards and Technology (NIST), Digital Signature Standard, FIPS PUB 186-2, http://csrc.nist.gov/publications/fips/fips186-2/fips186-2.pdf
[6]. Abdalla,M., Reyzin,L.: A New Forward-Secure Digital Signature Scheme. In: ASIACRYPT 2000,LNCS, Vol.1976, pp. 116-129. Springer-Verlag,(2000).
[7]. Anderson,R.: Invited Lecture, Fourth Annual Conference on Computer and Communications Security,ACM, (1997).
[8]. T Morkel, JHP Eloff � Encryption Techniques: A TIMELINE APPROACH� published in Information and Computer Security Architecture (ICSA) Research Group proceeding.
[9]. Text book William Stallings, Data and Computer Communications, 6eWilliam 6e 2005.
[10]. Md. Nazrul Islam, Md. Monir Hossain Mia, Muhammad F. I. Chowdhury, M.A. Matin �Effect of Security Increment to Symmetric Data Encryption through AES Methodology� Ninth ACIS International Conference on Software Engineering, Artificial Intelligence, Networking, and Parallel/Distributed Computing 978-0-7695-3263-9/08 DOI 10.1109/SNPD.2008.101 IEEE 2008.
[11]. Joan Daemen and Vincent Rijmen, AES submission document on Rijndael, June 1998.

R. Arya , "Triple Security of File System for Cloud Computing," International Journal of Computer Sciences and Engineering, Vol.2, Issue.3, pp.148-154, 2014.

This paper is detailed about the proliferation of media sharing through third party vendors and tracking of guilt agent using a key generation and encryption of key in media file using asymmetric key cryptography techniques. Main focus of this paper is on the security provided for proliferation of media which help the admin to track person for leakage. In the process of each key generation is based on timestamp of system, LSB replacement along with encryption of key using RSA algorithm. Stegnalysis is the art of detecting the message�s existence and blockading the covert communication. The Least Significant Bit steganography is a technique in which least significant bit of the image is replaced with data bit.

Assymetric Key Cryptograhy,Steganalysis,Least Significant Bit,Watermarking

[1] Papadimitriou P and Garcia-Molina, �Data Leakage Detection� Knowledge and Data Engineering, IEEE Transactions on Volume: 23, Issue: 1, Page No (51-63), Jan 2011.
[2] Kumar Ajay, Goyal Ankit, Kumar Ashwani, Chaudhary Navneet Kumar and Sowmya Kamath, �Comparative evaluation of algorithms for effective data leakage detection�, Information & Communication Technologies (ICT), 2013 IEEE Conference, ISBN 978-1-4673-5759-3,Page No(177-182),April 11-12,2013.
[3] Shailender Gupta, Ankur Goyal and Bharat Bhushan �Information Hiding Using Least Significant Bit Stegnography and Cryptography� Vol: 4, No: 6, Page No (27-34), June 2012.
[4] V. Darmstaedter, J. -F. Delaigle, D. Nicholson and B. Macq, �A block based watermarking technique for MPEG-2 signals: Optimization and validation on real digital TV distribution links�, Proceedings 3rd European Conference on Multimedia Application, Services and Technique, ISBN 978-3-540-64594-8,Page No (190-206),May 1998.
[5] J. Lee and Sung-Hwan Jung, �A survey of watermarking techniques applied to multimedia� IEEE International Symposium on Industrial Electronics, Volume: 1, Page No (272-277), June 2001.
[6] Hamid Shojanazeri, Wan Azizun Wan Adnan and Sharifah Mumtadzah Syed Ahmad, �Video Watremarking Technique for Copyright Protection and Content Authentication�, International Journal of Computer Information Systems and Industrial Management Application, ISSN 2150-7988, Volume: 5,Page No(652-660),2013.
[7] B. G. Mobasseri, �Exploring CDMA for watermarking of digital video� Proceedings of the SPIE, Volume: 3675, Page No (96-102), April 1999.
[8] F. Hartung, J. K. Su, and B. Girod, �Spread spectrum watermarking: malicious attacks and counter-attacks,� from Conference Volume:3657 Proceeding SPIE Security and Watermarking of Multimedia Contents, San Jose, CA, Page No (147�158), Jan. 1999.
[9] Mrs. Kavitha, Kavita Kadam, Ashwini Koshti, Priya Dunghav �Stegnography Using Least Significant Bit Algorithm�, International Journal of Engineering Research and Applications (IJERA) ISSN: 2248-9622 Volume:2, Issue:3, Page No (338-341),May-Jun 2012.

A. Tale, M. Gunjal, B.A. Ahire, "Data Leakage Detection Using Information Hiding Techniques," International Journal of Computer Sciences and Engineering, Vol.2, Issue.3, pp.155-158, 2014.

� Cloud Computing is a internet based computing that facilities hardware, network and software resources and provide flexible infrastructure on demand as pay per usage. The benefits of cloud computing is due to its reduced cost, resource sharing and performance. Cloud is based on the difficulty of securing storage data and maintain privacy. The security is the only problem in the cloud .Security is not provided in the cloud ,many companies have their own unique security structure Though , Amazon has its own security structures. The data placed in the cloud is accessible to everyone . To overcome this difficulty ,we have proposed RSA algorithm between cloud service provider and the user. The aim of our proposed work is to enhance security issues and maintain privacy.

RSA algorithm , Cloud Computing, Encryption , Decryption, Public Key, Private key ,Security Attributes

[1] Shaheen Ayyub and Devshree Roy,�Cloud Computing Characteristics and Security Issues �, International Journal Of Computer Sciences and Engineering,Volume-1,Issue-4,Page no- 18-22, Dec 2013.
[2] Manpreet Kaur and Rajbir Singh,�Implementing Encryption Algorithm to Enhance data Security of Cloud in Cloud Computing �, International Journal of Computer Applications,Volume-17,Issue-18, ISSN-0975-8887, May 2013.
[3] Parsi Kalpana,�Data Security in Cloud Computing Using RSA Algorithm� , International Journal of Research in Computer and Communication Technology ,ISSN 2278-5841,Volume-1, Issue- 4,Page no-143-146, September 2012.
[4] Zhifeng Xiao and Yang Xiao, �Security And Privacy in Cloud Computing � ,IEEE, Volume-15, Issue-2, Page no � 843-858. Second Quarter 2013.
[5] Mandeep Kaur and Manish Mahajan, � Using Encryption Algorithms to Enhance the Data Security in Cloud Computing�, International Journal of Communication and Computer Technologies,Volume-1, Issue- 12, Page no-56-59,January 2013.
[6] Rajesh Piplode and Umesh Kumar Singh ,�An Overview and Study of Security Issues & Challenges in Cloud Computing�, International Journal of Advanced Research in Computer Science and Software Engineering , Volume-2, Issue-9 , Page no- 115-120, September 2012.
[7] Mamta Devi ,�Security and Privacy Concerns in Cloud Computing�, International Journal of Research Review in Engineering Science and Technology, Volume-1, Issue-2, Page no -109-117 , September 2012.
[8] William Stallings, �Network Security Essentials Applications and Standards�, Pearson Education , Third Edition ,2007.
[9] Atul Kahate �Cryptography and Network Security � , Tata MC Graw-Hill Education , Second Edition Page no -320-321 ,2010.
[10] www.google.com.

J. Singh, R. Rana, "Enhance Security Issues Using Data Cipher Algorithm in Cloud," International Journal of Computer Sciences and Engineering, Vol.2, Issue.3, pp.159-162, 2014.

Now a day, maintaining the security of the secret information has been a great challenge. Sending message habitually through a communication channel like internet draws the attention of third parties and hackers, perhaps causing attempts to break and expose the sent messages. Some solutions to be discussed is how to pass information in manner that the very existence of the message is unknown in order to repel attention of the potential attacker. Besides hiding data for secret communication, an approach of information hiding can be extended to copyright protection for digital media. In this paper, we propose modified LSB technique for Image Steganography to hide secret message i.e. Text, Image, Audio and Video in an Image which makes it harder for unauthorised people to extract the original message.

Stego-File, Cover-Image, Modified LSB

[1]. Ramanpreet Kaur, Prof. Baljit Singh, �Survey and Analysis of various Steganographic Techniques� , ISSN:2250-3676, Volume-2, Isuue-3, 561-566
[2]. T. Morkel, J.H.P. Eloff, M.S. Olivier, �An Overview Of Image Stegnography�, Information and Computer Security Architecture (ICSA) Research Group Department of Computer Science University of Pretoria, 0002, Pretoria, South Africa.
[3]. Mehdi Hussain and Mureed Hussain, �A Survey of Image Steganography Techniques� , International Journal of Advanced Science and Technology Vol. 54, May, 2013
[4]. Joyshree Nath, Asoke Nath, �Advanced Steganography Algorithm using Encrypted secret message�, (IJACSA) International Journal of Advanced Computer Science and Applications, Vol. 2, No.3, March 2011
[5]. Shilpa Gupta, Geeta Gujral and Neha Aggarwal, �Enhanced Least Significant Bit algorithm For Image Steganography�, IJCEM International Journal of Computational Engineering & Management, Vol. 15 Issue 4, July 2012 ISSN (Online): 2230-7893, www.IJCEM.org

S. Nimje, A. Belkhede, G. Chaudhari, A. Pawar, K. Kharbikar, "Hiding Existence of Communication Using Image Steganography," International Journal of Computer Sciences and Engineering, Vol.2, Issue.3, pp.163-166, 2014.

Now a days the use of the world wide web (www) is increasing rapidly and leading to security breaches of a system so testing the software system has been made iterative. Testing requires effort, time and skilful person. Hacking mostly occur in banking sector and business organizations because they maintain all the confidential information. One of the hacking technique is commonly occur in banking sector is sql injection. Security testing can be done by two ways i.e static analysis which is otherwise known as white box testing and by dynamic analysis which is known as black box testing.In this paper we have shown the penetration testing of web application to detect the sql injection vulnerability. This paper describes the penetration testing processes and mainly focuses on vulnerability discovery, attack generation and obtain the test cases and maintaining a pentester database which store all the attack responses. We have taken an internet banking transaction case study. This paper has the main motivation is to detect the sql injection by the attack generation. In sql injection system the attacker might insert a malicious code in the user input field and trying to gain access the confidential and sensitive information from the database and making the database insecure. Penetration testing is widely used to simulate an attack of the web application and then analysis the attack pattern and give better solution to the system. This paper has given an overview of the penetration testing process and sql injection attack and a pentester database.

Testing, Security Testing , Penetration Testing, Sql Injection

[1] Halfond WGJ, Orso , Improving penetration testing through static and dynamic analysis, Software Testing, Verification, And Reliability(2011).
[2] Pulei Xiong, Liam Peyton, A Model-Driven Penetration Test Framework for Web Applications, 2010 Eighth Annual International Conference on Privacy, Security and Trust.
[3] Lashanda Dukes,Xiaohong yuan, A case study on web application security testing with tools and manual testing, 2013.
[4] Halfond WGJ, Orso A. AMNESIA: Analysis and Monitoring for NEutralizing SQL-Injection Attacks, Proceedings of the International Conference on Automated Software Engineering, Long Beach, CA, U.S.A., November 2005;174183.
[5] T. Pietraszek and C. V. Berghe , Defending Against Injection Attacks through Context-Sensitive String Evaluation, In Proceedings of Recent Advances in Intrusion Detection (RAID2005), 2005
[6] Bernard Stepien, Liam Peyton, Pulei Xiong , Using TTCN-3 as a Modeling Language for Web Penetration
[7] www.owasp.org
[8] A. Kie zun, P. J. Guo, K. Jayaraman, and M. D. Ernst, Automatic creationof SQL injection and cross site scripting attacks, in Proc. of ICSE, 2009.
[9] Lei Xu, Baowen, A frame work for web application testing, International Conference on Cyberworlds, 2004.
[10] Nuno Antunes, Marco Vieira, Evaluating and Improving Penetration Testing in Web Services, IEEE,2012.
[11] Halfond WGJ, Viegas J, Orso A, A classification of SQL-injection attacks and counter measures, Proceedings of the International Symposium on Secure Software Engineering, Washington, DC, U.S.A., March 2006.
[12] Halfond WGJ, Orso A, Manolios P. WASP: Protecting web applications using positive tainting and syntax-aware evaluation, Transactions on Software Engineering 2008; 34(1):6581.
[13] G . Buehrer, B. W. Weide, and P. A. Sivilotti, Using parse tree validation to prevent SQL injection attacks, in Proceedings of the 5th international workshop on Software engineering and middleware, 2005, p. 113.
[14] Sutton M, Greene A, Amini P. Fuzzing, Brute Force Vulnerability Discovery, Addison-Wesley: Reading, MA,2007.
[15] Arkin B, Stender S. McGraw G, Software penetration testing. IEEE Security and Privacy 2005; 3(1):8487.

J. Upadhyaya, N. Panda, A.A. Acharya, "Attack Generation and Vulnerability Discovery in Penetration Testing using Sql Injection," International Journal of Computer Sciences and Engineering, Vol.2, Issue.3, pp.167-173, 2014.

Nowadays with rapid development in high technology and modern instrumentation image fusion has become a vital component of a large number of applications. On the basis of three categories Pixel, Feature and decision a no of methods and algorithms have proposed for Image Fusion. This would be an interesting task to take some best recently used methods and analyze which one is better and effective. This Paper considers two fusion techniques Discrete Wavelet Transform (DWT) and Principal Component Analysis, fusion methods for these two techniques has been proposed and also the effectiveness is compared. In DWT the two images to be fused are decomposed at different levels and their approximation and detail co-efficient are calculated, a fusion scheme is used to combine these co-efficient and then Inverse of DWT is taken to reconstruct the image. In PCA the principal components of the two images are extracted and a fusion scheme is proposed to fuse these principal components to reconstruct the image. Finally comparison of these two techniques is performed on the basis of some evaluation criteria and the decision has drawn that which technique is better.

Image Fusion, Wavelets, DWT, PCA

[1] P.J. Burt and E.H Adelson, �The Laplacian Pyramid as a Compact Image Code�, IEEE Transactions on Communications, Vol. com-31, Issue 4, pp, April 1983.
[2] Y. Yang, D.S.Park, S. Huang and N. Rao, �Medical Image Fusion via an Effective Wavelet-Based Approach�, EURASIP Journal on Advances in Signal Processin, Vol. 2010, pp 1-13, March 2010.
[3] Y. Zhou, A. Mayyas and M. A. Omar �Principal Component Analysis Based Image Fusion Routine With Application To Stamping Split Detection�, Research in Nondestructive Evaluation, 2011.
[4] O. Prakash, R. Srivastava and A. Khare, �Biorthogonal Wavelet Transform Based Image Fusion Using Absolute Maximum Fusion Rule�, IEEE Conference on Information and Communication Technologies, pp, 2013.
[5] S. Li, J. T. Kwok, and Y. Wang, � Multifocus image fusion using artificial neural networks�, Elsevier, pp 994-995, 2002.
[6] U. Patil and U. Mudengudi, �Image fusion using hierarchical PCA�, International Conference on Image Information Processing, pp 5, 2011.
[7] V. R. Lakshmi Gorty, �Continuous generalized hankle-clifford wavelet transformation�, International Journal of Computer Sciences, Vol. 1, Issue 4, pp 1-10, 2013.

V.K. Mishra, S. Kumar, C. Singh, "Implementation and Comparison of Image Fusion using Discrete Wavelet Transform and Principal Component Analysis," International Journal of Computer Sciences and Engineering, Vol.2, Issue.3, pp.174-181, 2014.

Image fusion can be broadly defined as the process of combining multiple input images or some of their features into a single image without the introduction of distortion or loss of information. The aim of image fusion is to integrate complementary as well as redundant information from multiple images to create a fused image output. We introduce the basic principles of image fusion at pixel level, feature, and decision. Design rules and steps of graphical user interface (GUI) are described. Image fusion system based on graphical user interface has been designed and implemented below. We give you part of the overall design of the system and explain their method of use. The system has many functions: image denoising, image enhancement, image registration, image segmentation, image fusion, and evaluation of the merger.

Image Fusion, GUI, Pixel level fusion

[1] Y. Zhou, A. Mayyas and M. A. Omar �Principal Component Analysis Based Image Fusion Routine With Application To Stamping Split Detection�, Research in Nondestructive Evaluation, pp78-79, 2011.
[2] P.J. Burt and E.H Adelson, �The Laplacian Pyramid as a Compact Image Code�, IEEE Transactions on Communications, Vol. com-31, Issue 4, pp 4, April 1983.
[3] Y. Yang, D.S.Park, S. Huang and N. Rao, �Medical Image Fusion via an Effective Wavelet-Based Approach�, EURASIP Journal on Advances in Signal Processin, Vol. 2010, pp1-12, March 2010.
[4] O. Prakash, R. Srivastava and A. Khare, �Biorthogonal Wavelet Transform Based Image Fusion Using Absolute Maximum Fusion Rule�, IEEE Conference on Information and Communication Technologies, pp577-578, 2013.
[5] Z. Wang, Y. Tie and Y. Liu, �Design and Implementation of Image fusion System�, International Conference on Computer Application and System Modeling, pp 141, 2014.

V.K. Mishra, S. Kumar, R.K. Gupta, "Design and Implementation of Image Fusion System," International Journal of Computer Sciences and Engineering, Vol.2, Issue.3, pp.182-186, 2014.

Recent research report shows the wide acceptance of agile development methodology to create qualitative software in short development cycles. It encourages the early development of software with more promising quality. Early testing strategies with multiple test cycle decrease the number of defect in product. In each iteration automated testing minimize the test effort and cost of testing. Basic agile practices like pair programming, continuous integration, small release, simple design and re-factoring make the development procedure more promising. Scrum is most widely used agile framework for developing software within four weeks. It keeps the document light and manage requirements in the form of product backlog. Testing is performed on the features which are developed in scrum process. Tester are more integrated with development team and collaborate with customers for early feedback. Automated tools are used to enhance the communication in distributed team members. Planning and meetings are the heart of agile testing. Design is more flexible to accommodate change in requirements. Testing process includes unit, integration and regression testing with non functional testing. Automated tool s are used for unit and regression testing in scrum process. These tools helped significantly to simplify and speed up the development cycle. In this paper the testing process performed in scrum environment is discussed through testing model. Test strategies like unit and regression testing method is adopted in the process. Management of user requirements through product backlog and sprint backlog is discussed with suitable example. Different methodology of backlog estimation i.e initial estimation technique and planning poker method is discussed in this paper.

Agile Software Development, Scrum testing, Backlog management

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S. Harichandan, N. Panda, A.A. Acharya , "Scrum Testing With Backlog Management in Agile Development Environment," International Journal of Computer Sciences and Engineering, Vol.2, Issue.3, pp.187-192, 2014.

Producing and using renewable fuels for transportation is one approach for sustainable energy future for the world. A renewable fuel contributes lesser global climate change. In this study the effect of using liquefied petroleum gas (LPG) as a primary fuel with two different ignition enhancers diethyl ether (DEE) and dimethyl ether (DME) on performance, combustion and emissions characteristics of a single cylinder, four-stroke, water-cooled naturally aspirated DI diesel engine was carried out. LPG has a simpler hydrocarbon structure than conventional fuels. DEE and DME are recently reported as a renewable fuel and to be a low-emission high-quality diesel fuel replacement. A single cylinder, four-stroke, water-cooled naturally aspirated DI diesel engine having rated output of 3.7kW at 1500 rpm was used for the experiments. Measurements were made to study the performance, combustion and emissions characteristics and to compare between these two ignition enhancers and conventional diesel fuel. From the results, it is observed that using LPG/DEE was better than LPG/DME on performance, combustion and emissions characteristics of diesel engine and both were better than conventional diesel fuel, especially in a reduction of NO, smoke and particulate emissions. The brake thermal efficiency for both LPG/DEE and LPG/DME lower at full load with a reduction of NO emission than the diesel operation. The maximum reduction in smoke and particulate emissions is observed at high loads, when compared to that of diesel operation; however an increase in CO and HC emissions was observed.

Diesel engine, DI, LPG, DEE, DME, Combustion, Emissions, Characteristics

[1]. YADAV R, Rajay S. A text book of internal combustion engines and air pollution, 1st ed. Allahabad: Central Publishing House; 2002, p. 672.
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M.M. El-Ghobashy El-Hagar, "Effect of Diethyl Ether and DIMETHYL Ether With Liquefied Petroleum Gas on Combustion And Emissions Characteristics of Diesel Engine," International Journal of Computer Sciences and Engineering, Vol.2, Issue.3, pp.193-198, 2014.

In an environment where processes those execute concurrently, speeding up their computation is important. Deadlock is a major issue that occurs during concurrent execution. In this paper, we present an approach to generate testcases from UML sequence diagram for detecting deadlocks during the design phase. This will reduce the effort and cost involved to fix deadlocks at a later stage. Our work begins with design of sequence diagram for the system, then converting it to intermediate graph where deadlock points are marked and then traverse to get testcases. The testcases thus generated are suitable for detecting deadlocks.

Software testing, Test cases,Sequence diagram, Concurrency, Deadlock

[1] R.V Binder, "Testing Object-Oriented Systems Models, Patterns, and Tools, Object Technology Series". Addision Wesley, Reading, Massachusetts, October 1999
[2] P. Nagarani I, R. Venkata Ramana Chary, "A Tool Based Approach For Automation Of GUI Applications",ICCCNT�12 26th-28th July 2012, Coimbatore, India
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A. Mallick, N. Panda, A.A. Acharya, "Generation of Testcases from UML Sequence Diagram and Detecting Deadlocks using Loop Detection Algorithm," International Journal of Computer Sciences and Engineering, Vol.2, Issue.3, pp.199-203, 2014.