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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?
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.
Consider a computer system with 48-bit logical address and 4-KB page size. System supports up to 1 GB of physical memory. Illustrate how many entries are there in each of the following?
In your new position at XYZ Company, you have been asked to lead a risk assessment group. As part of your assignment to assess security risks for the computing infrastructure.
Write a multi-threaded program to solve producer and consumer problem
Discuss the main reasons for IT project failures? Are they because of problems with project management life cycle, product development life cycle,
Using exactly one semaphore, create an algorithm which prevents deadlock. Do not be concerned about starvation and inefficiency.
5 Disk, seek time, latency, sector, request Single-platter disk rotation speed: 7200 rpm number of tracks on one side of platter. What is avg rotational latency?
Implement a basic shell that restricts the runtime of processes executed from within it. Your shell will read input from the users and execute it as a new process, but if that program runs longer than it should, your shell will kill the process an..
Assume a time sharing operating system allocated time slices of twenty milliseconds and the machine executed an average of 5000 instructions per microsecond.
The answer gives the learner with an understanding of management's role in the development and enforcement of data security policies, standards, practices, precess and guidelines.
Your corporation has just occupied an old historic building in which fifteen workers will work. Due to historic building codes, the corporation is not permitted to run cables inside walls or ceilings.
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