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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?
Formulate the above in terms of a Linear Programming problem Solve this linear program graphically. Determine the quantity of each type of toaster that will maximise the maximum profit
Having a Domain Name Server available to the public can be a tool in the hand for attackers. If anyone is able to use your Domain Name Server, they can use it to send a huge amount of traffic to their victim.
Describe the idea and process of Data Binding. Include an example of statements that would be used to create a Binding object. Describe components and effects of your model statement.
Assume that a disk drive has 5,000 cylinders, numbered 0 to 4,999. The drive is recently serving a request at cylinder 143, and the last request was at cylinder 125.
White Hat Cracking engage security testing by arrangement. Grey Hat Cracking seeks to identify insecure systems and inform administrators or users of vulnerabilities.
I was recently working on our mainframe UNIX system, and suddenly I received a message that the server required to be rebooted on my screen.
Determine some of the factors other then the network itself that can cause the network to seem slow?
You have been asked through the Training Manager to present a lunch and learn seminar on an area within your field of expertise. You select cryptography.
Discuss and explian wired and wireless media along with the drawbacks and benefits of each also Discuss the channel signaling systems used in voice communication along with the drawbacks and benefits of each.
A spawned process may be destroyed automatically when its parent is destroyed, as one method; another design is to have spawned processes proceed independent of the parent
Explain the scientific principles behind a computer technology and discuss how social, political, economic or ethical impact of computers on our cultural structures and beliefs.
A local beauty corporation has implemented a website to boost sales and awareness of products they manufacture. The website will contain data about the firm and all products available.
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