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An Improved Efficient Fault-Tolerant
Group Key Agreement Protocol
--Indu Bala Thingom and Bubu Bhuyan
In order to ensure secure communication between communicating entities, a secret session key needs to be shared between these entities. This avoids any adversary from intruding and hijacking the communication. An authenticated group key agreement protocol is generally designed to accommodate the need of a group of specific entities in communicating over an open network with a shared secret key, which is used to preserve data confidentiality and integrity. A fault-tolerant group key agreement protocol establishes a shared key among participants of a group even when some malicious participants disrupt key agreement processes. Most of the existing group key agreement protocols operate only when all participants are honest, but do not work when some participants are malicious and attempt to destruct the key agreement processes. In 2013, Anmin Fu, Gongxuan Zhang and Zhenchao Zhu proposed a secure and efficient fault-tolerant group key agreement protocol, which is resistant to different key attack and the message tampering attack according to the security analysis. In this paper, we have proposed an improved version of this protocol which proves to be more efficient in terms of computational cost. © 2015 IUP. All Rights Reserved.
Binary CD&M Encryption Algorithm
for Enhancing Security in Cloud
--Arshia S Mohammadi and Divya Binish
Cloud computing is the way of providing computing resources in the form of service rather than a product, and utilities are provided to the users over the Internet. The main goal of cloud computing is to secure and protect data and processes which come under the property of users. The security in networked environment, especially in cloud computing, is an exclusive research area that is attracting several research communities. Storage of data and security using standard cryptographic algorithms has become an important topic of research. Cryptography is widely used to protect data from unauthorized access and modifications. In this paper, a new symmetric algorithm is proposed. Binary CD&M encryption algorithm is a simple symmetric key cryptography algorithm for enhancing security of small amount of data in cloud computing environment © 2015 IUP. All Rights Reserved.
Genetic Algorithm-Based Bacterial Foraging
Optimization Watermarking Model for Fingerprint
and Palmprint Multimodal Biometric System
--S Anu H Nair and P Aruna
The multimodal biometric watermarking system using multiple sources of information has been widely recognized. In this paper, multimodal biometric system is obtained by fusion of biometric features. The biometric features fingerprint and palmprint images are subjected to modality extraction. Different fusion methods like average fusion, minimum fusion, maximum fusion, discrete wavelet transform and stationary wavelet transform are implemented for the fusion of extracting modalities. The best fused image is analyzed by applying various fusion metrics. Generally, optimization watermarking systems provide better results than the other watermarking systems. In this paper, a hybrid of Genetic Algorithm and Bacterial Foraging Optimization Algorithm (GA-Based BFOA) is proposed for watermarking of images. The best fused image along with the cover image is fed as input to the watermarking algorithm. Various metrics such as Peak Signal Noise Ratio (PSNR), Normalized Absolute Error (NAE) and Normalized Cross Correlation (NCC) are used for analyzing the robustness of the algorithm with various cover images. © 2015 IUP. All Rights Reserved.
Social Media as a New Trend in
Sri Lankan Digital Journalism: A Study
--S Thuseethan and S Vasanthapriyan
The rapid growth of social media in the last five years is indicative of its importance and its integration into the daily lives of many people in Sri Lanka. In parallel with this, there has also been considerable growth in digital journalism through the online medium. But the reachability of social media is much higher compared to the traditional online media. As a result, social media is converted into online news media, revolutionizing the digital journalism. This study explores the new trend in digital journalism with the presence of social media and carries out empirical research to understand the effectiveness of social media as news media. © 2015 IUP. All Rights Reserved.
A Review of Security Issues
in Mobile Agent-Based E-Commerce
--Ananta Charan Ojha
E-commerce is increasingly playing an important role in business organizations and for individuals. Mobile agent technology is very promising for e-commerce applications. However, commercial deployment of mobile agent-based e-commerce system requires several infrastructural supports such as security, trust, agent matching mechanisms, financial and legal services. This infrastructure provides confidence and satisfaction to users while facilitating promotion of large-scale industrialization of mobile agent-based e-commerce systems. In this paper, the security issues for mobile agents are analyzed, and the security requirements for e-commerce and available measures are discussed to mitigate the security threats. © 2015 IUP. All Rights Reserved.
A Comparative Study of Histogram Shifting, Reversible
Contrast Mapping and Difference Expansion Methods
--Navnath S Narawade and Rajendra D Kanphade
It is important to restore original image and watermark in many applications such as military and medical. It is also referred to as ‘reversible watermarking’. Individual algorithm is difficult to analyze for a particular application, hence we compare the algorithm on some criteria. Here we present a comparative study of Difference Expansion (DE), Reversible Contrast Mapping (RCM) and Histogram Shifting (HS) methods. The results showed that HS method is the best method. It gave better PSNR than the other two methods, while embedding capacity of DE method proved to be better than the other two methods. We tested all methods for high and low quality images and found that all methods are suitable only for high quality images, while HS method is additionally suitable for cartoon and medical images. DE and RCM methods need improvement for applications in cartoon and medical images. © 2015 IUP. All Rights Reserved.
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