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A foreign navy has implemented a secure communications system in which submarine commanders transmit a single 5-letter message every day. The messages may only use capital (English) letters, and all messages are equally probable. A crypto device encrypts each message into 20 bits of ciphertext.
a. What is the entropy of the plaintext message?
b. What is the entropy of the ciphertext message?
c. Is this a good cryptosystem? Why or why not?
The goal of this assignment is to implement a client-server application which emulates the ping utility. It is also good practice because it implements the client-server architecture.
Explain how you could use one or more of the Windows log files to investigate a potential malware infection on a system. What types of information are available to you in your chosen log file
Determine with justification the equation of the curve and determine with justification all values oft for which there is no point (x, y) on the curve.
An earlier version of WTLS supported a 40-bit XOR MAC and also supported RC4 stream encryption. Show that this scheme doesn't give message integrity protection.
Suppose monetary advantages of an information system of $50,000 the 1st year and increasing benefits of $5000a year of the next four years year 1=$50,000;
Compare U.S. and E.U. policies and underlying philosophies of privacy. Include references to monitoring and privacy in the workplace, surveillance, and disclosure/data privacy. In your estimation, could self-regulation be effective or does it need to..
use Microsoft Powerpoint to create your slides for a 15-minute presentation. It`s about Computer Hacking the same subject that you wrote in the report. You are going to take the same information that you wrote in the report and make it as slides.
Suppose that Alice shares secret with her company's server computer. When Alice is on trip, she tries to store important message in CEO's account directory. Is this protocol secure? If not, how do you feel it could be modified to make it so?
Cross-talk, and other forms of interference are a significant issue in any communications infrastructure. Compare and contrast how this problem would manifest for analog data transmitted
Suppose a terrorist is known to use Skype for encrypted email from internet cafes, using a known email ID in small city. How could you collect data for traffic analysis (i. e, what kind of technology or access could you use)?
Assume you are introduced to a assignment manager, who does not have authority to give a pay raise or promote a project team member.
What security vulnerabilities and threats can you see? What measures would you put in place to remove or minimize the vulnerabilities - Choose all the necessary and suitable MAC address, IP address for interfaces and port addresses implied by the a..
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