Consider Kerberos from the viewpoint of a corporation, for instance. Exists a contingency plan in case either the AS or TGS fails?
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Consider Kerberos from the viewpoint of a corporation, for instance.
Exists a contingency plan in case either the AS or TGS fails?
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- Denial of Service attacks are estimated to happen once every six months (twice a year) in a mid-size company. One such company, XYZ, estimates the cost of recovering from a single DoS attack to be $12000. The company decides to apply a number of controls to counter these attacks. With these controls, the frequency of successful DoS attacks against the company reduces to once a year and the cost of recovering from an instance becomes $8000. The cost of implementing these controls is $7,000 a year. The annual loss expectancy (ALE) without controls is $ A . The annual loss expectancy (ALE) with controls is $Denial of Service attacks are estimated to happen once every six months (twice a year) in a mid-size company. One such company, XYZ, estimates the cost of recovering from a single DoS attack to be $12000. The company decides to apply a number of controls to counter these attacks. With these controls, the frequency of successful DoS attacks against the company reduces to once a year and the cost of recovering from an instance becomes $8000. The cost of implementing these controls is $7,000 a year. From a purely financial point of view, is it worth for the company to implement these controls? Calculate the prior and post ALE and do a cost-benefit analysis to answer the question. In your answer make sure that you indicate what ARO, SLE and ALE are with and without controls. State clearly whether the company should implement the controls and explain why.With a short explanation, construct a scenario in which the real-world issue is resolved using a piecewise function.
- Denial of Service attacks are estimated to happen once every six months (twice a year) in a mid-size company. One such company, XYZ, estimates the cost of recovering from a single DoS attack to be $10,000. The company decides to apply a number of controls to counter these attacks. With these controls, the frequency of successful DoS attacks against the company reduces to once a year and the cost of recovering from an instance becomes $6,000. The cost of implementing these controls is $12,000 a year. From a purely financial point of view, is it worth for the company to implement these controls? O None of the these Yes, because the measures will save the company $2,000. ONo, because the measures will cost the company $2,000. No, because the measures will cost the company $4,000. Yes, because the measures will save the company save $14,000.Take, for example, a piece of software that, over the internet, permits a surgeon in one area to perform surgery on a patient in another. And now that the program is over, who would want to keep going? What kind of destruction do they want to cause? To what extent would they look to your weaknesses in order to pull you down? Is it possible that damage may be caused by such vulnerabilities even if there were no hostile aggressor present?Develop an attack tree (Section 1.5.2) for obtaining a meal in the Student Center food court without your account being charged. Remember that an attack tree is more useful the more paths it shows to get to the goal; yours should have at least three branches (i.e., high-level approaches) under the root. Given below is Section 1.5.2. 1.5.2 Attack trees for threat modeling Attack trees are another useful threat modeling tool, especially to identify attack vectors. A tree starts with a root node at the top, labeled with an overall attack goal (e.g., enter a house). Lower nodes break out alternative ways to reach their parent’s goal (e.g., enter through a window, through a door, tunnel into the basement). Each may similarly be broken down further (e.g., open an unlocked window, break a locked window). Each internal node is the root of a subtree whose children specify ways of reaching it. Subtrees end in leaf nodes. A path connecting a leaf node to the root lists the steps (attack vector)…
- You are given a rundown of n whole numbers. You can play out the accompanying activity: you pick a component x from the rundown, delete x from the rundown, and deduct the worth of x from every one of the excess components. Accordingly, in one activity, the length of the rundown is diminished by precisely 1 Given a whole number k (k>0), find assuming there is some arrangement of n-1 activities to such an extent that, subsequent to applying the tasks, the last component of the rundown is equivalent to k. Here is a guide to assist you with understanding the interaction better: In the underlying cluster, we had two 2-s, three 1-s, just a single 4 and just a single 3, so after the initial step, every component became equivalent to the quantity of its events in the underlying exhibit: each of the twos changed to 2, every one of the ones changed to 3, four changed to 1 and three changed to 1In a simulation study on cyber attacks, the researcher is interested to investigate on whether the attack(s) are successfully performed. Let A define the event that an attacker has successfully performed the attack. Let A’ denote the complement of event A. Define A’ in words.Two new computer codes are being developed to prevent unauthorizedaccess to classified information. The first consists of six digits (each chosenfrom 0 to 9); the second consists of three digits (from 0 to 9) followed by twoletters (A to Z, excluding I and O).(i) Which code is better at preventing unauthorized access (defined as breaking the code in one attempt)?(ii) If both codes are implemented, the first followed by the second, what isprobability of gaining access in a single attempt?
- Paul needs to read and write some documents. In the following, assume the system security policy is described completely by the Bell-LaPadula model. Note that the situation described may be impossible, in which case say so and show why. Please give the least clearance that Paul can have if he wishes to read a document with classification (SECRET, {NUC, EUR}) and a document with classification (CONFIDENTIAL, {ASI}). Please give the greatest clearance that Paul can have if he wishes to write to a document with classification (TOP SECRET, {EUR}) and a document with classification (SECRET, {EUR, NUC}). Please give the greatest clearance that Paul must have if he wishes to read a document with classification (SECRET, {EUR, NUC}), to write a document with classification (CONFIDENTIAL, {NUC, EUR}), and to read another document with classification (TOP SECRET, {ASIA, EUR}).Let’s say, you are given a task to identify the community which is severely infected by a virus such as Covid-19. As an environmental engineer, using the concepts of conditional probability, how can you develop a mathematical model to identify the infected community. Write all the parameters and show their relationships?We have a set of activities that require stand-alone access to a common resource, given the form A = {a1, a2, ..., an}, so if the resource is reserved for one activity, that activity cannot be assigned to another activity until it has finished. • The activity needs the ai resource in the [si, fi] time interval. Here si indicates the start time of the activity and fi indicates the end time of the activity. You can think of the time values given here as positive integers. • The goal is to find the largest possible number of non-contagious activities, ie the time periods where they need common resources do not overlap. Assuming that the activities are presented in ascending order with respect to their start times, design an algorithm based on dynamic programming for the activity selection problem. Your algorithm should find and return the maximum number of non-overlapping activities that can be selected from a set of activities given in the above conditions. Just as you write your…
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