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Explain the life cycle of an information system.Apply the steps of the life cycle to the scenario listed below.
Suppose that you run a photography printing store. Your workers have been using punch cards for time entry since you started the business. This has lead to many problems including lost cards, inaccurate hours, and employees punching in other employees. Because of these problems you are considering implementing a computerized time entry system. Describe each step of the life cycle, and apply it to your problem in your business.
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?
How can we apply division method to calculate hash value of character string without using more than constant number of words of storage outside string itself?
Describe a procedure that selects a key uniformly at random from among the keys in the hash table and returns it in expected time O(L.(1 + 1/α)).
Write a research paper about data encryption techniques. Your content should include the following: Business advantages and disadvantages of full disk encryption, compared to other types of encryption techniques.
Show a message that Alice may have spoofed, and demonstrate that its hash value collides with Bob's original hash.
Why is one-time password system considered more secure than the basic authentication system? Give at least two reasons.
Search the Internet for good examples of cases that involve ethical issues and the abuse of privacy. Provide a review and analysis of your findings.
Determine how much time, if any, these two employees are spending surfing the Web. Is it wrong to access these records? Do some research on workplace privacy laws to justify your answer.
Use whois at Network Solutions, netsol.com and/or whois.arin.net to find contact information and DNS servers for one organization. Also find the IP address range for their network. Print your results.
In Diffie-Helman protocol, the common modulus is selected as n = 19 and the generator g is chosen to be 2. Alice and Bob select numbers 6 and 10 privately.
You decide to prepare a security checklist for New Century. Prepare a list of security issues that the firm should evaluate and monitor. Be sure to organize the items into categories that match the five security levels.
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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