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The designers of the UNIX password algorithm used a 12-bit salt to perturb the first and third sets of 12 entries in the E-table of the UNIX hashing function (the DES). Consider a system with 2^24 users. Assume that each user is assigned a salt from a uniform random distribution and that anyone can read the password hashes and salts for the users.
What is the expected time to find all users' passwords using a dictionary attack?
Assume that eight more characters were added to the password and that the DES algorithm was changed so as to use all 16 password characters. What would be the expected time to find all users' passwords using a dictionary attack?
Assume that the passwords were eight characters long but that the salt length was increased to 24 bits. Again, the salts (and the corresponding algorithms) are known to all users. What would be the expected time to find all users' passwords using a dictionary attack?
Jan and Kim have decided that they require creating an Intranet. They intend to implement a Web server for internal use. They realize that they require to implement at least one Domain Name Server server.
Determine the minimum size and Maximum size of an Ethernet frame, in bytes?
In Many development companies and universities network managers must oversee a network that has several computers connected to it that are used through developers for design and product development reason.
Assuming fetches to main memory are started in parallel with look-ups in cache, calculate the effective (average) access time of this system.
White Hat Cracking engage security testing by arrangement. Grey Hat Cracking seeks to identify insecure systems and inform administrators or users of vulnerabilities.
Construct a resource allocation graph with the following processers and resources, the system consists of four processers P1, P2, P3, and P4 and five resources R1, R2, R3, R4, and R5.
A 4480 octet datagram is to be transmitted and requires to be fragmented because it will pass through an Ethernet with a maximum payload of 1500 octets.
Discuss some of the many considerations in choosing the correct information system to use for trading futures and stocks?
Suppose if run through itself, an I/O bound program spends more time waiting for I/O than using the processor and vice versa for the processor-bound.
Bench Fitness Centers has 8- i ndividual locations in this area. Most of the centers have the similar equipment and provide the same services,
Assume you are a chief information officer who is hired through a company that generates electricity with three coal burning electric power plants located in various parts of the nation.
Determine the importance of having enough RAM? Discuss how does it relate to how fast a computer can process data from a big database residing on ones hard drive?
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