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Question:
a. During an off-line dictionary attack, suppose the attacker has complied a dictionary of 10,000 entries, and he/she found that the password file contains 100 users with 50 different salt values. If the attacker's goal is to get as many passwords as possible, how many hash values would he/she compute in the worst case?
b. Following above (a), how many comparisons between hash values are needed in the worst case?
c. Suppose the server is using Lamport's one-time password scheme, and an attacker somehow possesses the value h^40(m). Now he observes that a legitimate user sends h^60(m) to the server and is granted access. At most how many times can the attacker login (be precise with your answer)?
Discuss one disadvantage to relying only on fats, and not carbohydrates, for energy via aerobic metabolism.If Keith adopts an all-meat diet, what vitamins should he make sure to supplement his diet with to avoid deficiency?
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In the mid-seventeenth century, Dutch scientist Jan Baptista van Helmont struggled to understand where plants get the material that allows them to grow larger. He planted a willow tree of a given weight in a ?xed quantity of soil and then, ?ve ..
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Pine has density ρp = 0.373 x 103 kg/m3. The density of seawater is ρw = 1.03 x 103 kg/m3. What fraction of a pine log floating in seawater is below the surface
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Analyze the various strategies involved with "rightsizing" and determine possible ethical issues resulting from those strategies. Please give specific examples.
Identify the responsibilities of a Project manager when participating in a real world project and define the role of management in projects, particularly from the view point of the practitioner as a member of the project team;
A 1,024-bit message is used to generate a 24-bit hash. On the average, how many other messages could be expected to generate the same hash value? What is the probability that two massages that generate the same 24-bit hash?
Explain why you think the use of these guidelines and procedures is not sufficient and may not solve the problem. Consider how a company-wide policy program could help the situation.
Computer Science or Information Technology deals with Wireless LAN Security. Wireless LAN Security is gaining importance in the recent times. This report talks about how vulnerable are wireless LAN networks without any security measures and also talk..
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Output the string rotated to the right by a user-defined number of characters (0 or more). For example, Hello world!rotated by two characters would be: Hello world.
Describe a malware attack that causes the victim to receive physical advertisements and describe an instance of a file that contain evidence of its own integrity and authenticity.
What sorts of protection is provided by the bank to ensure secure online banking? Justify why the bank would use these security measures.
The HR department has sensitive information that can only be viewed by members of the HR department and executive offices. Each location has computers and printers for use within the individual departments but that not to be used by employees from an..
Network Security Management-flow diagram, assets and detail of functions. I have completed the assets and flow diagrams and interfaces. Start systems engineering on for MIIS, based on prior homework assignments:
What is the difference between the terms ‘safety' and ‘security' and what is the conclusion of the paper?
what is a security incident?a security incident in an organization is a serious event that can occur at any point from
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