A Review on Intrusion Detection System to Protect Cloud Data

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1 A Review on Intrusion Detection System to Protect Cloud Data Shivani Arora 1, Rajesh Kumar Bawa 2 M.Tech Student 1, Associate Professor 2 Department of Computer Science, Punjabi University Patiala 1, 2 Abstract: Cloud computing is a paradigm which allows the users to use the applications without installing them at their own end. With internet access, they can access their files at any computer. Different types of attacks such as Denial of service attack and Distributed denial of service attack makes the network to become unusable. With the use of IDS, these types of attacks can be resisted. An IDS identifies suspicious behavior by monitoring and analyzing the user traffic. It sends early alarms whenever there is risk of exposure caused by an attack. Thus it helps in preventing the serious damage to the system. In this paper, a review on IDS is done to protect cloud data and comparison is done on basis of different parameters. Keywords: Cloud data, IDS, denial of service, security, INTRODUCTION a. Cloud Computing Cloud Computing does not deliver the product, rather it provides the computing as a service where shared resources, software and information are provided to computers and other devices as a utility over a network. It provides storage services that do not need enduser knowledge of the physical location and configuration of the system that delivers the services. The main disadvantage of Cloud Computing is security. Various attacks such as IP spoofing, Address Resolution Protocol spoofing, Routing information Protocol attack, DNS poisoning, Flooding, Denial of Service 30 Shivani Arora 1, Rajesh Kumar Bawa 2 (DoS), Distributed Denial of Service cause the targeted system or network unusable. Intrusion detection system (IDS) is a solution to resist these kinds of attacks [1]. b. Types of attacks First kind of attack is known as internal attack in which authorized cloud users may try to gain unauthorized privileges. After signing in, frauds can be committed and information can be disclosed to others. For example, an internal DoS attack demonstrated against the Amazon Elastic Compute Cloud (EC2). In External Attacks, outsiders disturb nodes from providing services. Internal intrusion is more dangerous than external. c. Intrusion Detection System Intrusion detection system (IDS) is one of the most efficient attack prevention mechanisms. The traffic that violates pre-defined rules will be alerted or blocked, but not for that inside the perimeter. In the environment of cloud, many audit logs are recorded and many alert logs are also reported by IDS. Some attack attempts recorded in a log might not be successful as the target machine does not possess the vulnerability exploited by the attack. Therefore, alert or warning from a log might not be able to plot the whole picture. However, multiple logs could indicate if a previous attack is successful as a compromised target may leave some attack trace in different logs. [9]. With the help of IDS, the logs, user and network traffic are monitored and analyzed in

2 a view to identify any suspicious activity. An IDS sends early alarm upon risks of exposure caused by any attack so that the system administrators get alert and execute respective response measurements to prevent any damage to the system. An IDS consists of several components- a sensor which generates security events, a console to monitor events, alerts and control the sensor, and a central engine that s records event logged by the sensor in a database and generates alert from security event received [8]. d. Types of IDS IDSs can be classified into host based IDSs, network-based IDSs and distributed IDSs. 1. Host-Based Intrusion Detection System Host-based IDSs operate on information collected from within an individual computer system. It monitors the packets from the computer system only and would alert the user or administrator if suspicious activity is detected. Host-based IDSs use the computing resources of the hosts they are monitoring, therefore inflicting a performance cost on the monitored systems. 2. Network-Based Intrusion Detection System Network-based Intrusion Detection Systems stress on the network rather than a specific host. Network-based IDS detects attacks by capturing and analyzing network packets. By listening on a network segment, a networkbased IDS can monitor the network traffic that affects many hosts which are connected to the network segment, hence protecting those hosts. 3. Distributed Intrusion Detection System (DIDS) A Distributed IDS (DIDS) consists of multiple IDS (E.g. HIDS, NIDS etc.) over a large network, all of which communicate with each other, or with a central server that enables 31 Shivani Arora 1, Rajesh Kumar Bawa 2 network monitoring. The intrusion detection components collect the system information, convert it into a standardized form and pass it to central analyzer. Central analyzer aggregates information from multiple IDS and analyzes the same [1]. e. Intrusion Detection Techniques The intrusion detection techniques are discussed as follows: Anomaly Detection Approach This approach is used to identify abnormal unusual behavior on a host or network. They assume that attacks are different from legitimate activity and can therefore be detected by systems that identify these differences. Misuse Detection Approach This approach analyzes system activity, looks for events or sets of events that match a predefined pattern of events that describe a known attack. As the patterns corresponding to known attacks are called signatures, misuse detection is sometimes called signature-based detection. LITERATURE SURVEY C. Modi et al. [1] studied that cloud computing provides scalable, virtualized ondemand services to the end users with greater flexibility and lesser infrastructural investment. The bugs and vulnerabilities which exist in underlying technologies and legacy protocols open doors for intrusion. It discusses various techniques and types of IDS and how they can be incorporated in cloud. Intrusions like integrity, confidentiality and availability of Cloud services in the future are studied.. This paper stresses on the use of other alternative options to incorporate IDS/IPS in cloud and explores the locations

3 where IDS/IPS can be positioned so that attacks on data can be easily detected and prevented. Recent research findings which incorporate IDS/IPS in Cloud have been discussed and their advantages and disadvantages have been highlighted. The paper has identified several security challenges which can be resolved. C. M. Chen et al. [9] proposed a detection system which analyzes the logs in the cloud to determine the intensions behind the attacks. Sometimes the administrator neglects some stealthy reconnaissance actions for the insignificant number of violations. Hidden Markov model is adopted to model the sequence of attack performed by hacker and such stealthy events in a long time frame will become significant in the state-aware model. The preliminary results show that the proposed system can identify such attack plans in the real network. The primary concern is whether user data is secure and the allocated resources are not bleached in such sharedsource and distributed computing environment. Traditional intrusion detection mechanism might not be able to address such issue as some traffic might not be monitored. Multiple logs in cloud should be inspected and correlated to identify attack plans adopted by hackers in cloud. This study examines the stages of an attack plan and analyzes logs to identify attack sequences. Hidden Markov model, suitable for recognizing time sequence events, is proposed to detect such attacks. The preliminary results show that the proposed detection model is efficient to identify attack sequences. P.K. Shelke et al. (2012) [2] suggested that providing security in a distributed system requires more than user authentication with passwords or digital certificates and confidentiality in data transmission. Distributed model of cloud makes it vulnerable and prone to sophisticated 32 Shivani Arora 1, Rajesh Kumar Bawa 2 distributed intrusion attacks like Distributed Denial of Service (DDOS) and Cross Site Scripting (XSS). To handle large scale network access traffic and administrative control of data and application in cloud, a new multi-threaded distributed cloud IDS model has been proposed. The proposed cloud IDS handles large flow of data packets, analyze them and generate reports efficiently by integrating knowledge and behavior analysis to detect intrusions. R.Vanathi et al. (2012) [6] studied that computer networks face a constant struggle against intruders and attackers. Attacks on distributed systems grow stronger and more prevalent each and every day. Intrusion detection methods are a key to control and potentially eradicate attacks on a system. An Intrusion detection system pertains to the methods used to identify an attack on a computer or computer network. In cloud computing environment the applications are user-centric and the customers should be confident about their applications stored in the cloud server. Network Intrusion Detection System (NIDS) plays an important role in providing the network security. They provide a defense layer which monitors the network traffic for pre-defined suspicious activity or pattern. Snort, Tcpdump and Network Flight Recorder are the most famous NIDS. C.L. Tsai et al. (2011) [3] proposed a dynamic intrusion detection system for strengthening the security application of cloud computing. In the proposed mechanism, numbers of intrusion detectors are dispatched on the whole topology of the networking system through multi-layers and multi stages deployment. Those information security issues related with the application and service of cloud computing are experimented and discussed. The experiments include the equipment security of the client side termination, the threats of web site and webpage, the detection and diagnosis and surveillance of intrusion, the access and

4 security of database in the cloud side, the detection of system leakage and the monitor of real-time repairing process, the management of server system, the management of mobile e- commerce processing, and the integrated analysis of associated security information and issues. The goal of the proposed mechanism is not only focused on finding out some solutions, but also focused on developing some feasible information security techniques or products for the application and service of cloud computing. Experimental results demonstrate that the proposed mechanism does provide good performance for intrusion detection. S. Roschke et al. (2009) [4] pointed out that Intrusion Detection Systems (IDS) have been used widely to detect malicious behaviors in network communication and hosts. IDS management is an important capability for distributed IDS solutions, which makes it possible to integrate and handle different types of sensors or collect and synthesize alerts generated from multiple hosts located in the distributed environment. Facing new application scenarios in Cloud Computing, the IDS approaches yield several problems since the operator of the IDS should be the user, not the administrator of the Cloud infrastructure. Extensibility, efficient management, and compatibility to virtualization-based context need to be introduced into many existing IDS implementations. Additionally, the Cloud providers need to enable possibilities to deploy and configure IDS for the user. They summarized several requirements for deploying IDS in the Cloud and propose an extensible IDS architecture for being easily used in a distributed cloud infrastructure. C.C. Lo et al. (2010) [5] developed a framework of cooperative intrusion detection system (IDS). The proposed system could reduce the impact of denial of-service (DoS) attack or distributed denial-of-service (DDoS) attacks. To provide such ability, IDSs in the cloud computing regions exchange their alerts with each other. In the system, each of IDSs has a cooperative agent used to compute and determine whether to accept the alerts sent from other IDSs or not. By this way, IDSs could avoid the same type of attack happening. The implementation results indicate that the proposed system could resist DoS attack. Moreover, by comparison, the proposed cooperative IDS system only increases little computation effort compared with pure Snort based IDS but prevents the system from single point of failure attack. CONCLUSION In this paper, we have discussed the paradigm of cloud computing, various types of attacks that hamper the security of the cloud, intrusion detection system to monitor and analyze the attacks, types and techniques of IDS. Research findings of different authors have been discussed and the future research scope is discussed. REFERENCES [1] C. Modi, D. Patel, H. Patel, B. Borisaniya, A. Patel, M. Rajarajan, A survey of intrusion detection techniques in Cloud, Journal of Network and Computer Applications, 36(1), pp , [2] Ms. Parag K. Shelke, Ms. Sneha Sontakke, Dr. A. D. Gawande, Intrusion Detection System for Cloud Computing, International Journal of Scientific & Technology Research Volume 1, Issue 4, May [3] C-L.Tsai, U-C. Lin, A.Y.Chang, C-J.Chen, Information Security Issue of Enterprises Adopting the Application of Cloud Computing, Department of Computer Science, Chinese Culture University, Shivani Arora 1, Rajesh Kumar Bawa 2

5 [4] S. Roschke, F.Cheng, C.Meinel, Intrusion Detection in the Cloud, Hasso Plattner Institute (HPI), University of Potsdam, Eighth IEEE International Conference on Dependable, Autonomic and Secure Computing, [5] C-C. Lo, C-C.Huang, J.Ku, A Cooperative Intrusion Detection System Framework for Cloud Computing Networks, Institute of Information Management, National Chiao Tung University, 39th International Conference on Parallel Processing Workshops, [6] R.Vanathi & S.Gunasekaran, Comparison of Network Intrusion Detection Systems in Cloud Computing Environment, Department of Computer Science Coimbatore Institute of Engineering and Technology, International Conference on Computer Communication and Informatics (ICCCI -2012), Jan , 2012, Coimbatore, INDIA, [7] H.A.Kholidy, F.Baiardi, CIDD: A Cloud Intrusion Detection Dataset For Cloud Computing and Masquerade Attacks, Ninth International Conference on Information Technology- New Generations, [8] W. Yassin, N.I. Udzir, Z. Muda, A. Abdullah and M.T. Abdullah, A Cloud- Based Intrusion Detection Service Framework, Faculty of Computer Science and Information Technology, Universiti Putra Malaysia, [9] C-M Chen, D. J. Guan, Y-Z Huang, and Y- H Ou, Attack Sequence Detection in Cloud Using Hidden Markov Model, Department of Computer Science and Engineering, Seventh Asia Joint Conference on Information Security, [10] R.S. Khune and J. Thangakumar, A Cloud-Based Intrusion Detection System for Android Smartphones, 2012 International Conference on Radar, Communication and Computing (ICRCC), SKP Engineering College, Tiruvannamalai, TN., India December, pp Shivani Arora 1, Rajesh Kumar Bawa 2

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