Networking and Communication Engineering

K. Maheswari ¹, M. Punithavalli ²

Affiliations
1 Department of Computer Applications, SNR SONS College, Coimbatore, IN
2 Department of Computer Applications, Sri Ramakrishna Engineering College, Coimbatore, IN

Abstract

A major change in telecommunication industry is Voice over Internet Protocol (VoIP). VoIP offers interactive communications. It differs from conventional circuit switched networks. It allows people to communicate with each other at very low rates. The transmission of Real time voice data is not as easy as ordinary text data. The real time voice transmission faces lot of difficulties. It suffers from packet loss, delay, security and quality. These factors will affect the communication, degrades the performance and quality of a VoIP. This paper addresses the security aspects of VoIP to improve the quality. The modified shamir's secret sharing algorithm is designed to improve security in terms of delay.

Keywords

Security, Quality, Telecommunication and VoIP.

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S. Manimegalai ¹, C. Sumithiradevi ², M. Punithavalli ³

Affiliations
1 Department of Computer Applications in V.S.B. Engineering College, Karur, Tamil Nadu, IN
2 Bharathiyar University, Tamil Nadu, IN
3 Department of computer applications in SNS Arts and Science College, Coimbatore, Tamil Nadu, IN

Abstract

Cloud computing, a rapidly developing information technology, has aroused the concern of the whole world. Cloud computing is a virtualized pool of computing resources. It can manage a variety of different workloads, including the batch of back-end operations and user-oriented interactive applications. There are many resources available in a data center and in the cloud that a client can purchase or rent, such as processing time, network bandwidth, disk storage, and memory. The users of the cloud do not need to know where the data center is, or have any expertise on how to operate or maintain the resources in the cloud. Clients only need to know how to connect to the resources and how to use the applications needed to perform their jobs. This article introduces the background and service model of cloud computing. This article also introduces efficient approaches, techniques and challenges for data centers.

Keywords

Cloud Computing, Cloud Service, Data Centers, SaaS.

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G. Satyavathy ¹, M. Punithavalli ¹

Affiliations
1 Department of Computer Science, Sri Ramakrishna College of Arts and Science for Women, Coimbatore-641 044, IN

Abstract

In structured P2P systems, message deliverance can be done by identifying the peer IDs of the individual systems. The initiator has to decide the destination and can route the message through one or more hops. The message passes from one hop to another correctly by identifying the IP address and finally reaches the destination. In this paper we propose an efficient routing strategy to control the routing path and to identify the malicious nodes. We also eliminate the drawbacks of encryption by introducing  steganography in message deliverance. This paper proposes a new steganographic encoding scheme which separates the colour channels of the windows bitmap images and then hides messages randomly in the LSB of one colour component of a chosen pixel where the colour components of the other two are found to be equal to the key selected. In addition to this we apply DCT based Steganography which embeds the text message in least significant bits of the Discrete Cosine (DC) coefficient of digital picture. When information is hidden inside video, the program hiding the information usually performs the DCT. DCT works by slightly changing each of the images in the video, only to the extent that is not noticeable by the human eye. An implementation of both these methods and their performance analysis has been done in this paper.

Keywords

Peer-To-Peer, Least Significant Bit (LSB), Discrete Cosine Transform (DCT), Steganography.

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A. S. Naveenkumar ¹, M. Punithavalli ²

Affiliations
1 Department of Finance and Computer Application, S.N.R. Sons College, Coimbatore, Tamil Nadu, IN
2 Computer Science Department, Sri Ramakrishna College for women, Coimbatore, Tamil Nadu, IN

Abstract

In all the applications that transfer binary data such as bulk data transfer will seek to minimize the overall transfer time. This paper proposes a novel approach for Internet Protocols (IP) networks. This paper presents Alternative Best Effort (ABE) Router that relies on the notion of providing low delay at the disbursement of fewer throughputs. The main objective of the proposed approach is to retain the simplicity of the original Internet single-class best-effort service while providing low delay to interactive adaptive applications. With ABE, each best effort packet is marked as either blue or green. The presence of green packets in every router ensures low bounded delay. Based on the nature of the traffic and global traffic conditions of a particular application the color the packets is chosen for every router. At the time of congestion the green packets are more likely to be dropped than the blue packet. The proposed router requirements aim at enforcing benefits for all types of traffic; as the green packet achieves low delay and the blue traffic receives at least as much throughput as it would in a flat best effort network. In addition this paper also discuss on ABE service, properties, requirements and usage. Moreover, it discusses the implications of replacing the existing IP best effort service by ABE service.

Keywords

Data Transfer, Internet Protocols, Alternative Best Effort, Router, Packets, Throughput.

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D. Anitha ¹, M. Punithavalli ²

Affiliations
1 Sri Ramakrishna College of Arts and Science for Women, Coimbatore, Tamil Nadu, IN
2 Department is with the Sri Ramakrishna College of Arts and Science for Women, Coimbatore, Tamil Nadu, IN

Abstract

Group key management is an important functional building block for any secure multicast architecture. Many grouporiented and distributed applications need security services which includes key management. Such applications need a secure group key to communicate their data. This brings importance to key distribution techniques. Secure group communication has applications in multimedia conferencing, stock quote distribution shared work space,distributed interactive simulation, grid computing, teleconferences, pay-per-view, multi party games etc., some of these applications engage in one to many communications while others involve many to many communications. Several protocols have been proposed to support secure group key management. This paper focuses on several protocols that are designed for secure group key management. Various protocols are discussed on focusing the key management.

Keywords

Group Key Management, Security, Secure Group Communication, Multicast.

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P. Sumathi ¹, M. Punithavalli ²

Affiliations
1 Department of Computer Science, PSG College of Arts & Science, Coimbatore, IN
2 Department of Computer Science, Sri Ramakrishna College of Arts and Science for Women, Coimbatore, IN

Abstract

This paper provides a design framework for the adoption of Grid Computing for E-governance applications. It enables citizens to make best use of automated administration processes that are accessible on-line. In this paper, we illustrate the creation of a virtual environment by using existing Grid technologies to specific e-governance applications on distributed resources. Grid computing is an ideal solution to this type of applications and the paper presents how grid computing can be used to effectively and efficiently handle such huge data. Also this paper discusses the requirements of the clients of an advance reservation service and a distributed architecture for such a service. It has been tested using Grid Simulation Toolkit called GridSim. The experimental results shown that the new reservation algorithm can lead to significant performance gain in various applications.

Keywords

Advance Reservation, Scheduling, Heterogeneous System, Grid Simulation, Meta Schedule, Grid Service Provider, Task Graph and Runtime Estimates.

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