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1. You are Alice. You have agreed with your friend Bob that you will use the Diffie-Hellman public-key algorithm to exchange secret keys. You and Bob have agreed to use the public base g = 3 and public modulus p = 809. You have secretly picked the value SA = 17. You begin the session by sending Bob your calculated value of TA. Bob responds by sending you the value TB = 291. What is the value of your shared secret key?
2. A particular cipher is implemented by combining the ASCII representation of plaintext characters with pseudorandom bytes (eight-bit binary strings of 1s and 0s) using the XOR function. In the process of encrypting a message, a character in the plaintext, a capital H, is XORed with the pseudorandom byte 10111100.
a. What is the ciphertext (in binary form) generated by the encryption of the character D? (show your work.)b. How is the plaintext for this encrypted D recovered? (show your work.)
3. An organization has 300 members. It is desired that each member of the organization be able to communicate securely with any other member, without any other member being able to decrypt their messages. How many unique keys are required if:
a. The organization uses a symmetric cipher.b. The organization uses an asymmetric cipher.
Answer the following in relation to a scenario where Bob and Alice use Kerberos for mutual authentication. When Bob receives a ticket from Alice, how does he know it is genuine?
Explain why asynchronous I/O activity is a problem with many memory protection schemes, including base/bounds and paging. Suggest a solution to the problem.
SLE, ARO, and ALE, behavioural biometric technology, Enterprise Information Security Policy, Issue Specific Security Policy, System Specific Security Policy, firewalls protect network, creating a DMZ during firewall implementation, use of SSL to se..
Below are given of ciphertext, from Affine cipher. Determine the plaintext and key. Give a clearly written description of the steps you followed to decrypt each ciphertext.
Discuss two drawbacks of steganography Describe the operation of a Trojan Horse program. How can we protect our computer from such a program
concept of Data, information and knowledge in information warfare, politically motivated computer misdeeds, McClintock Manufacturing, Percentage of Windows systems that run antivirus software that is updated each day, network traffic that is evaluate..
3G Safekeeping model, safekeeping architecture standards ITU-T X.805 and ISO/IEC 18028-2, access points (AP), network admission controller (NAC) and authentication server (AS)
The purpose of this project is to provide you with an opportunity to create a document retention policy. You will also learn how to serve a litigation hold notice for an educational institute.
Encrypt the following Plaintext using Vigenere cipher: Plaintext: stocks market is falling Key : one. Is Vigenere cipher monoalphabetic or polyalphabetic? Why?
If you receive the ciphertext message YPHDCRPBEQTAA, decrypt to recover the plaintext. What is the decryption function, and the recovered plaintext? What type of cipher is this?
Write a research paper about data encryption techniques. Your content should include the following: Business advantages and disadvantages of full disk encryption, compared to other types of encryption techniques.
Express the Shannon-Hartley capacity theorem in terms of where is the Energy/bit and is the psd of white noise.
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