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Compare and contrast access control models. Select an access control model that best prevents unauthorized access for each of the five scenarios given below. Which types of logical access controls should be used in each scenario? Justify your recommendations. Access Control Models Mandatory access controls Discretionary access controls Role-based access controls Rule-based access controls Content-dependent access controls Nondiscretionary access controls Scenarios Shovels and Shingles is a small construction company consisting of 12 computers that have Internet access. Top Ads is a small advertising company consisting of 12 computers that have Internet access. All employees communicate using smartphones. NetSecIT is a multinational information technology (IT) services company consisting of 120,000 computers that have Internet access and 45,000 servers. All employees communicate using smartphones and e-mail. Many employees work from home and travel extensively. Backordered Parts is a defense contractor that builds communications parts for the military. All employees communicate using smartphones and e-mail. Confidential Services Inc. is a military support branch consisting of 14,000,000 computers with Internet access and 250,000 servers. All employees must have security clearances, and they communicate mainly using smartphones and e-mail.
Assume that instead of using composite N = pq in RSA cryptosystem, we simply use prime modulus p. Calculate m mod p. Justify correctness and analyze running time of decryption algorithm.
Analyze the fundamentals of PKI, and determine the primary ways in which its features and functions could benefit your organization and its information security department.
Explain Cross Site Scripting attack
A small magazine publisher wishes to determine the best combination of 2-possible magazines to print for the month of July. Backyard magazine, which he has published for years, is a contant seller.
A report on Tools to enhance Password Protection.
The initial state is not output (in contrast to the example). Is this version of two-bit system noninterference-secure with respect to Lucy? Why or why not?
The owners of a store are looking for a lighted sign that could be mounted outside the store. The lights in the sign should be turned on when the outdoor light level falls given below a level defined through the owners.
phase 1 communication between Alice and Bob. Suppose the raw keys consist of k bits each. What is the expected number of bits on which Alice's and Bob's raw keys agree? Explain your answer.
The topic, may be of your interest, needs to be approved in advance by the course convenor Dr Xin-Wen Wu; other than that, there are no restrictions.
Compare U.S. and E.U. policies and underlying philosophies of privacy. Include references to monitoring and privacy in the workplace, surveillance, and disclosure/data privacy. In your estimation, could self-regulation be effective or does it need to..
3G Safekeeping model, safekeeping architecture standards ITU-T X.805 and ISO/IEC 18028-2, access points (AP), network admission controller (NAC) and authentication server (AS)
Sally generates key KA when required as KA = h(Alice,KS ),with keys KB and KC generated in similar manner. Explain one advantage and one disadvantage of key diversi?cation.
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