INTRODUCTION TO NETWORK SECURITY ABSTRACT Network security is protection of the files and directories in a computer network against hacking, misuse and unauthorized changes to the system. Network security involves the authorization of access to data in a network which is controlled by the network administrator. Users are assigned an ID and password or other authenticating information that allows them access to information and programs within their authority. Today almost anyone can become a hacker by downloading tools from the internet. Nowadays security is becoming vital in case of networking because everyday a new kind of attack is generated which leads to compromise our network and have security in network is decreasing because
The companies do not need to cost much money on making changes of their networks. It keeps translating between the set of protocols whenever the two banks want to make connections. If the headquarters get stuck, the whole connection will be influenced. Furthermore, the LANs cannot get communications in time so the headquarters may need to transfer more data which give it more pressure. Alternative B It has the best results.
Because a third party now has our backs, the thinking might go, there’s less of a need to be vigilant. The Pros of Outsourcing Outsourcing cybersecurity to a digital MDR, quite simply, ensures better detection of and response. In the end, vigilance of cyber threats lurking in digital channels is digital MDRs’ core business. They invest in the latest technology and make sure it is being constantly updated. They hire highly-skilled expert staff that’s more experienced when it comes to threat detection and response than any in-house security team.
was concerned that electromagnetic emanations could be intercepted and reconstructed so there is a need for some standard for the protection of data.  Objective: Objective of TEMPEST is to reduce the risk of exploiting emanations from intelligence systems. TEMPEST provides measures to protect information from unauthorized access due to unintentional emanations. Special shielding is used to suppress the emissions that are emitted from the device. TEMPEST equipment is used to prevent the intruders from getting information through these emanations by using different listening devices.
Introduction : The history of information security begins with computer security . The need for computer Security — that is, the need to secure physical locations, hardware, and software from threats. Despite the fact that information security plays an vital role in shielding the information and wealth of an organization. we habitually hear news about the security incidents, such as mutilation of websites, as well as server hacking and data escapeing.The organizations require to be entirely thoughtful of the need to allot more resources to the safeguard of information assets , and information security must become a top anxiety in both government and business. To address the situation, a number of governments and organizations have set up
A Survey on Wormhole Attack Prevention: ASWAP Prof.Smita Pawar, Steffi Saldanha , Silviya Mouris, Leena Mariaselvam Abstract An ad-hoc network has a dynamic topology. The network is self organizing and adaptive which repeatedly changes its topology .Nodes can be easily added into the network and hence security issues are a major concern in such networks. It’s broadcasting character and transmission medium helps the attacker to interrupt the network. In this paper, we have elaborated on a severe attack called as wormhole attack, its causes and the techniques that are available to detect and prevent the attack. Also a comparative study of the techniques is done and their pros and cons have been stated.
Steganography usually not designed to replace the cryptography but it helps in creating more secure communication after combining with cryptography by using best of both techniques. Thus it is proved that using cryptography techniques which use compression, hash function, automatic key generation, distortion process etc., the data becomes more secure and robust as compared to steganography technique alone. Thus the encryption of secret message and then hiding results in more secured
Host Based Intrusion detection: Such systems (also referred to as system call intrusion detection systems) handle the operating system call traces. Collective anomalies are the major types of anomalies detected in such systems. The anomalous events may refer to malicious programs, unauthorized behaviour, data stealing, policy violations, virus attacks. Network Intrusion Detection Systems: In this the anomalous intrusions in network data are identified in the form of collective or point anomalies. These systems deal with detecting intrusions in network data.
To engage in IP spoofing, a hacker must first use a variety of techniques to find a trusted IP address and then modify the packet headers so that it appears that the packets are coming from that host. (Vangie Beal, 2014) IP spoofing’s perpetrators trick their victims into interacting with the fake Web site. (Gary Shelly, Misty Vermaat, 2011) For example, the victim may provide private information such as credit card numbers and online banking credentials; or download files containing viruses, worms, or other malware. Unfortunately, IP spoofing cannot be eliminated completely, as the identity of the intruder is unknown, hence, making detection and prevention difficult. (Depak Gahlot,
These files has palette of 256 colours and use low colour images along with low file size. Using an image with low resolution along with less file size will enable image to be load on website quicker as it required low bandwidth but with the resized of image by graphical browser it will pixelated and make image more blur. Vector image are high resolution images and good for graphical browser as it does not pixelated with its resized and it mostly used to create logos format include PDF, EPS etc. most commonly vector images used more resolution and contain more file space so it may affect the web browsing time in slower internet speed. Video and