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1. Why are timestamps used in the Kerberos protocol? 2. Assume that Alice shares a secret with her company's server computer. When Alice is on a trip, she tries to store an important message in the CEO's account directory. This message needn't be encrypted since confidentiality is not important here, but the CEO needs to be guaranteed that the message really is from someone who knows the secret s (e.g. Alice) when the CEO opens his/her computer the next day. A naïve protocol to achieve this may look like this: Alice-->Server: "This is Alice, I have an important message to forward to the CEO" Server-->Alice: "OK, please encrypt R" (where R is a random nonce) Alice-->Server: "Es(R)" (that is, R is encrypted with the secret s) Server-->Alice: "Please send the message" Alice-->Server: "The CEO needs to attend a meeting in Liverpool on May 1, 2006" The server stores this message in the CEO's directory Is this protocol secure? If not, how do you feel it could be modified to make it so?
Solve the following problems using linearity of expectation. . (For each problem you will want to think about what the appropriate random variables should be and define them explicitly.)
Write a program that prompts the user to input a string and then outputs the string in the pig Latin form. The rules for converting a string into pig latin form are described in Programming example : Your program must store the characters of a str..
You are an engineer involved in the development of a financial system. During installations, you discover that this system will make a significant number of people redundant. It is your professional responsibility to complete the installation as..
Description Design Analyses (perhaps include sub-categories for each process) Description of Units being Designed What do they remove? Explain how do they operate?
Write java code for your hello/loop
HCHLock lock, what will happen if the time between becoming cluster master and successfully splicing the local queue into the global queue is too small? Suggest a remedy to this problem.
Write a program to turn LED4 and LED1 ON. LED2 and LED3 must be OFF.
Do you conduct routine and regular maintenance on your personal computer? Do you do use utilities like disk clean-up, error checking, defragmentation, and back-up?
bull discuss four different types of wireless technologies in a 350- to 700-word paper in apa format.bull describe the
A digital signaling system is required to operate at 9600 b/s, If a signal element encodes a 4-bit word, what is the minimum required bandwidth of the channel?
Explain why you think these questions would be the type to "reveal" the computer to be a computer? Why would these responses have to be given a human begin?
Draw the hierarchy chart and then plan the logic for a program needed by the sales manager of The Henry Used Car Dealership. The program will determine the profit on any car sold
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