Essay on Computer Security

Integrity models have three goals: • Prevent unauthorized users from making modifications to data or programs • Prevent authorized users from making improper or illegal modifications • Maintain internal and external consistency of data and applications An example of integrity checks is balancing a batch of transactions to make sure that all the information is present and accurately accounted for. Availability Models Availability models keep data and resources available for authorized use, especially during emergencies or disasters (Wu, Zhen-Yu, et al. pp. Information security professionals usually address three common challenges to availability: • Denial of service (DoS) due to intentional attacks or because of undiscovered flaws in implementation (for example, a program written by a programmer who is unaware of a defect that could crash the program if an individual unexpected input is encountered) • Loss of information system capabilities because of natural disasters (fires, floods, storms, or earthquakes) or human actions (bombs or strikes) • Equipment failures during normal use Some activities that preserve confidentiality, integrity, and/or availability are granting access only to authorized personnel, applying encryption to information that will be sent over the Internet or stored on digital media, periodically testing computer system security to uncover new vulnerabilities, building software defensively, and developing a disaster recovery plan to ensure that the business can continue to exist in the event of a disaster or loss of access by personnel.

Confidelity models Confidentiality refers to the agreement of researcher to manage, share, and store research data to ensure that information acquired from and about research participants is not imperfectifully divulged. As network grow, the above are the fundamental goals, but of course, specific systems may even have extended purposes (I am not claiming I covered all possible issues with this open-ended question. Nowadays, company network threats are becoming a daily headache for the IT staff; it helps to have some guidance, or at least determine what to seek out for (Manshaei, Mohammad Hossein, et al. pp. As a small organization doing business on the network, you need to know these techniques so you can be extra observant when online. All the peril has been divided into three sections internal threat, system threat and external threat which are described below.

It is code or software that is mainly intended to damage, steal, disrupt, or as a rule inflict some other “terrible” or illegal activity on information, hosts, or network. Security measure: • Install antivirus software into the system and download updates to ensure that software has the latest fixes for new viruses, Trojans, worms and bots. • Ensure that antivirus software can scan email and the all the files downloaded from the internet. Potential vulnerabilities Application Security Many common enterprise applications contain inherent weaknesses. If your organization is not up to date on patching, you could be particularly vulnerable to attack through these known vulnerabilities. They’re a small device about the size of a typical key. Lacking the keyfob, the hacker will also require access.

Even if the hacker was somehow able to access your office and get a look at the password, without this keyfob to produce a unique one time pin, the password is useless. Something the retailer or an employee is Another credential that is widening in popularity is a biometric feature, like an employee’s fingerprint or even their iris, which can be scanned. This type of element comes with some advantages. RasEapMakeMessage processes incoming EAP packets and creates EAP packets for transmission to the remote peer. It also handles events such as timeouts and authentication completion. If a message is received from the remote peer, the AP authentication service calls RasEapMakeMessage, passing a pointer to the received signal in the receive packet parameter.

If the service calls RasEapMakeMessage with the received packet set to NULL, the AP is either initiating the dialogue with the authentication protocol or requesting that the contract resend the last packet. The authentication protocol should determine which action the service is taking based on its state and from the message context. For this reason, it is highly recommended to use a secure password for your Windows XP account. For more information about creating strong passwords, click Start, and then click Help and Support. In the Search box, type creating strong passwords, and then click the Start Searching button. Using an E2EE communications tool should not mean sacrificing vital functions of the business, such as video calls, secure file and screen sharing.

Fortunately, there are now available solutions, which combine the security benefits of E2EE with a non-technical user interface and the tools the businesses rely on. Using Net Flow forensics can help your IT team maintain the competitiveness and reliability of the systems required to run your business. In IT, network security forensics involves the monitoring and analysis of the network’s traffic to gather information, obtain legal evidence and detect network intrusions. These activities help keep the company perform the following actions.  Adjust to increased data and NetFlow volumes  Identify heightened security vulnerabilities and threats  Align with corporate and legislative compliance requirements  Contain network costs  Analyze network performance demands  Recommend budget-friendly implementations and system upgrades Net Flow forensics helps the company maintain accountability and trace usage; these functions become increasingly difficult as your network grows more intricate.

The more systems your network relies on, the more difficult this process becomes. Having a team member, whether internal or via a third-party vendor, that can aggregate its findings and create visual representations that can be understood by non-technical team members is a necessary part of Net Flow forensics (Ab Rahman, Nurul Hidayah, et al. pp. It is important to stress the necessity of visualization; this technique makes it much easier to articulate the importance of findings. To accurately and succinctly visualize security issues, your IT staff must have a deep understanding of the standard protocols of your network. Without this level of knowledge, the ability to analyze and investigate security issues is limited, if not impossible.  IEEE Cloud Computing 3. Ab Rahman, Nurul Hidayah, Niken Dwi Wahyu Cahyani, and Kim‐Kwang Raymond Choo.

Cloud incident handling and forensic‐by‐design: cloud storage as a case study.  Concurrency and Computation: Practice and Experience29. Arshad, Hamed, and Morteza Nikooghadam.  Security and Communication Networks 5.   Lippmann, R. P. et al.  Continuous security metrics for prevalent network threats: introduction and first four metrics.  Journal of medical systems 36.