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Dsigners of UNIX password algorithm used 12-bit salt to perturb first and third sets of 12 entries in E-table of UNIX hashing function (the DES). Let system with 224 users. Suppose that each user is allotted salt from uniform random distribution and that anyone can read password hashes and salts for users.
Determine the expected time to find all users' passwords using dictionary attack?
suppose that eight more characters were added to password and that DES algorithm was changed so as to use all 16 password characters. Determine expected time to find all users' passwords using dictionary attack?
Suppose that passwords were eight characters long but that salt length was increased to 24 bits. Again, salts (and corresponding algorithms) are known to all users. What would be expected time to find all users' passwords using dictionary attack?"
Assume that sender sends silence suppressed RTP stream of G.711 audio to receiver. During talk spurt 20 msecs chunks of quantized audio samples are encapsulated. Determine number of samples are included in each packet?
Do you think that the current Social Networking business model can sustain, given these generally self regulating norms?
How many fram need to sent? Determine the size of data in each frame?
Jesse wants my opinion on whether or not SCR needs a systems review committee. Need to prepare a recommendation and reasons.
It has already decided to use Windows Server 2003 network operating system. What type of LAN will your team design for this company?
Describe some of the advantages of having a componentized system. For example, what happens if the microwave breaks?
What were the most important things Cisco managers did right, i.e., where had the ERP team been "smart'? How did Cisco manage unanticipated problems?
A frame rate of 30 fps, and 8 bits for quantisation of each pixel. What is the required bandwidth for the transmission of the uncompressed video stream?
Let a simple telephone network consisting of two end offices and one intermediate switch. Ten percent calls are long distance. Determine maximum no. of telephones an end office can support?
Assume Host A wishes to send large file to Host B. Path from Host A to Host B has three links, of rates R1=500kbps, R2=2Mbps, and R3=1Mbps. Suppose no other traffic in network, Determine the throughput for file transfer.
You are to create a small network (less than 50 but greater than 20 nodes) for organization of choice consisting of multiple operating systems, security mechanisms, and devices.
Subnet classful Class C network into 2 subnets Diagram working LAN depicting two network subnets (can be in Word of Visio) Network should include
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