Earticle

In recent years, internet revolution resulted in an explosive growth in multimedia applications. Hence, concern about assurance of ownership rights has been mounting. In this paper, three public image watermarking techniques are proposed. The first one, called Single Watermark Embedding (SWE), uses the concept of Visual Cryptography (VC) to embed a watermark into a digital image. The second one, called Multiple Watermarks Embedding (MWE) extends SWE to embed multiple watermarks simultaneously in the same host image. Finally, Iterative Watermark Embedding (IWE) embeds the same binary watermark iteratively in different positions of the host image, to improve the robustness. Experimental results show that the proposed techniques satisfies all the properties of digital watermarking such as invisibility, security, capacity, low computational complexity and is robust to wide range of attacks.

This paper presents a study on the use of security standards in the context of serviceoriented architectures with the goal of testing which are more costly in terms of performance in building secure Web services. Security policies applied to web services are evaluated through application development, testing and performance evaluation. The results of this preliminary study will be used in the near future to create service level agreements in an SOA with a focus on quality of service called WSARCH (Web Services Architecture). The current prototype of this architecture already allows studies to accurately verify which security techniques have low impact in relation to performance.

New threats are constantly emerging to the security of organization’ information systems infrastructure. Firewall and VPN cannot prevent all intrusions and do little to prevent attacks from within the organization itself. Intrusion detection plays a vital role in ensuring the integrity of a network's security. Network intrusion detection systems (NIDS) or Intrusion Detection Systems (IDS) have long been seen as the most effective means of detecting attacks. However they do have significant weaknesses. The increasing quantity and diversity of legitimate network traffic has resulted in ever increasing hardware costs and the large number of false positive alerts generated can be too much to analyze effectively. By relying on the search for known attack signatures NIDS are unable to detect new forms of attacks and the use of encryption prevents them examining traffic altogether. An additional approach is required to tackle such problems. In this paper, we proposed a secure system for banking application using honeypots. Using this system, at least data integrity can be ensured along with monitoring the interaction to detect possible attack.

Since the data collected by the nodes of WSN are sensitive and vulnerable to attack, there’ a need of making the Wireless Sensor Networks (WSN) immune to attacks. Most of the researchers have come up with security solution to WSN based on layered approach. Layered approach has noticeable flaws like ‘edundant’security or ‘nflexible’security solutions. In this paper a new security scheme is proposed based on the concept of cross layer design methodology. Outline on the existing cross layer security schemes are also presented. The proposed approach doesn’ claim to be immune to all the security attacks but this new approach certainly gives a new direction towards WSN security. The cross layer security framework has been tested with three important application types of WSN.

The Mobile Ad-hoc Network (MANET) is a collection of self-configuring mobile node without any infrastructure. The mobile nodes with wireless radio interface are connected by wireless links where each device in a MANET is free to move independently and randomly with the capability of changing its links to other devices frequently. It is a multihop process because of the limited transmission range of energy constrained mobile nodes and thus each device in network topology acts as a router. Many protocols are reported in this field but it is difficult to decide which one is efficiently best. In this paper on demand routing protocols AODV, DSR and DYMO based on IEEE 802.11 are examined and characteristic summary of these routing protocols is presented. With MAC and physical layer model their performance is analyzed and compared on performance measuring metrics throughput, jitter, packet delivery ratio, end-to-end delay and error reply packets and dropped packets due to non availability of routes by varying CBR data traffic load using QualNet 5.0.2 network simulator.

In this paper the intention is to prevent potential types of vulnerabilities like blackhole and flooding attack on location- based geocasting and forwarding (LGF) routing protocol in Mobile Ad-hoc Network (MANET). The LGF protocol has proposed to the implemented by Global Positioning System (GPS)- free covered location tracking system with Geocast-enhanced Ad-hoc On-Demand Distance Vector (GAODV). In addition backhole and flooding attack will be generating the prevention techniques in LGF protocol and also find the impact of vulnerabilities to overcome the attacks. Simulation of LGF protocol and attacks has been work done by GloMoSim - 2.03 network simulator.