Assume for the following questions that we are referring only to IPv4. 1.) (3 points) The US Computer Emergency Readiness Team (US-CERT) publishes what are called Technical Cyber Security Alerts and Vulnerability Notes and these documents alert users to potential threats to the security of their systems. Select a Technical Security Alert or Vulnerability Note published in the last twelve months that has a network related component to it and research the reported problem and the suggested solution (if one is available.) Analyze and describe the problem, and the solution paying close attention to the network related issues that it raises. We are interested in reading your analysis, and not a cut-and-paste of what is on the website. The listing of recent Technical Security Alerts can be found at: http://www.us-cert.gov/cas/techalerts/ and the listing of Vulnerability Notes is at http://www.kb.cert.org/vuls I would like to describe the following security alert Alert (TA13-175A) Risks of Default Passwords on the Internet Description: Generally default factory configurations for appliances and embedded systems contains simple and publicly open passwords and the vendor expect that user should change the password once they start using those systems for personal use. The alert is about the risk involved in keeping these factory default passwords when using the system for personal use. Attackers can easily track and identify such system connected to internet which uses default passwords and can hack your system or entire network. The default passwords are easily available in product documentation. Hackers can find such vulnerable systems using search engines like Shodan. Attackers use common attack techniques by logging in with blank, de... ... middle of paper ... ...s it back to OS. 10. OS then adds the IP address in HTTP request and sends the data to MIT server. 5b.) What is DNS caching? How and why is it used? DNS is used to provide a mapping between the websites name and their respective IP addresses. DNS caching is a mechanism to cache this Website name–IP address mapping on the DNS server for some amount of time. When number of users in the office or universities access same websites again and again then DNS caching is used to improve the performance of the system as DNS server doesn’t need to do all hierarchical searching using root name servers and TLD name servers for each and every user request. Network will be too overloaded if we don’t use DNS caching as DNS server needs to do number of DNS queries in order to find one IP address. DNS caching stores the IP addresses of frequently used websites in the organization.
The password related configuration changes which are recommended below will make it more difficult or unauthorized users to figure out user passwords and access systems with the identified
In this section we investigate attacks and threats to our primary devices. These attacks and threats are built off of the vulnerabilities the previous section and help to determine which security controls would be most valuable against future attacks.
The use of hacking to identify weaknesses in computer security has become an increasingly controversial issue in recent years. Awareness of this issue is important, because our ever increasing reliance on technology means that breaches in computer security have the potential to have wide-ranging and devastating consequences to society, worldwide. This essay will begin by clearly defining the term ‘hacking’ and will examine the type of people who hack and for what reasons. There will then follow a discussion of the moral argument on hacking before examining a few brief examples. The essay will then conclude by arguing against the use of hacking as a means of identifying weaknesses in computer security.
and their use. In Committee on Deterring Cyber attacks: Informing Strategies and Developing Options (Ed.), Proceedings of a Workshop on Deterring Cyber attacks: Informing Strategies and Developing Options for U.S. Policy. Washington, D.C.: National Academies Press.
There is constant concern about different kinds of devices and tools because of their vulnerability: laptops; personal computers in the home; libraries and public workstations; USB Flash Drives and email, to name a few. These items are easily accessible for those attempting to breach security.... ... middle of paper ... ...
What is a problem with DNS? There is DNS spoofing and DNS hijacking both usually done by hackers, and they could direct users to websites containing malware or a third-party search engine or just corrupt DNS data in general.
IP – The Internet Protocol (IP) - is the method or protocol by which data is sent from one computer to another on the Internet. Each computer (known as a host) on the Internet has at least one IP address that uniquely identifies it from all other computers on the Internet.
When it comes to protecting an infrastructure, careful planning and coordination needs to take place. Protecting an infrastructure takes an important security initiative called Critical Infrastructure Protection (CIP). The United States critical infrastructure is protected by the Department of Homeland Security.
What concerns the government of the United States most is the security of the critical infrastructure from the cyber threats. The nation is depending heavily on the technology in most of its critical sectors to keep it up and running. Thus, this makes its more vulnerable to cyber-attacks from outsiders and insiders. Therefore, its protection must be a priority.
This lab was to discuss the vulnerability of weak passwords. We were thought how to crack our own passwords using a method called “john the ripper”. We also found out how secure various passwords and how long it would take for a desktop Pc to crack these passwords. We looked up various methods and applications to crack passwords.
Cybersecurity is the technology that protects computers and networks from unauthorized personnel. Ever since computers have expanded to homes and the workplace; the need for cyber security has grown exponentially. Millions of people around the world have access to the internet at a given time, and this allows for predators to attack, scam, hack, and intrude on personal and government information. Cybersecurity is designed to counteract these attempts to ultimately allow for safe networks and computers.
IP address is you Internet identity when you are connected to the web. It is synonymous to a postal address.
Thanks to the HTTP, a web server running some simple software programs can acquire our IP address and then gather information about us from our own computer. This information can be anywhere from what kind of software the computer is running to gaining access to all our email contacts. Sometimes less desirabl...
The nation has become dependent on technology, furthermore, cyberspace. It’s encompassed in everything we deliver in our daily lives, our phones, internet, communication, purchases, entertainment, flying airplane, launching missiles, operating nuclear plants, and implicitly, our protection. The more ever-growing technology empower Americans, the more they become prey to cyber threats. The United States Executive Office of the President stated, “The President identified cybersecurity as one of the top priorities of his administration in doing so, directed a 60-day review to assess polices.” (United States Executive Office of the President, 2009, p.2). Furthermore, critical infrastructure, our network, and internet alike are identified as national assets upon which the administration will orchestrate integrated cybersecurity policies without infringing upon and protecting privacy. While protecting our infrastructure, personal privacy, and civil liberties, we have to keep in mind the private sector owns and operates the majority of our critical and digital infrastructure.
It is difficult to define cyberculture because its boundaries are uncertain and applications to certain circumstances can often be disputed. The common threads of defining cyberculture is a culture which has evolved and continues to evolve from the use of computer networks and the internet and is guided by social and cultural movements reflective of advancements in scientific and technological information. It is not a unified culture but rather a culture that exists in cyberspace and is a compilation of numerous new technologies and capabilities, used by diverse people in diverse real – world locations. Cyberculture, a twentieth century phenomena, has brought challenges unlike any other that the United States has seen in the areas of cyber security and its impact on our most critical institutions. This presentation will focus on the aforementioned three entities where national security is in jeopardy in part due to cyberculture and its intentional use for disruptive and destructive purposes. Breaches of security to the United States Department of Defense, the national power grid and the Chamber of Commerce are very real and omnipresent.