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1. Suppose Alice with a Web-based e-mail account (such as Yahoo! mail or Hotmail) sends a message to Bob, who accesses his mail from his mail server using POP3. Discuss how the message gets from Alice's host to Bob's host. Be sure to list the series of application-layer protocols that are used to move the message between the two hosts.
Consider following protocol for sending an encrypted message from Alice to Bob in presence of Key Distribution Center (KDC).
Propose a detailed plan that focuses on password policies and authentication methods to protect the project from becoming public during the research and development phase.
You decide to prepare a security checklist for New Century. Prepare a list of security issues that the firm should evaluate and monitor. Be sure to organize the items into categories that match the five security levels.
Implement buffer overflow in c++ And attacking the devises by doing buffer overflow.
What is the ciphertext (in binary form) generated by the encryption of character D? How is plaintext for this encrypted D recovered?
Compute the entry in the RijndaelS-box
phase 1 communication between Alice and Bob. Suppose the raw keys consist of k bits each. What is the expected number of bits on which Alice's and Bob's raw keys agree? Explain your answer.
Describe network crimes that are related to DNS entry alteration or bogus DNS servers. In a network investigation, some network administrators may be cooperative while others may not.
Assume that Alice shares a secret s 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.
Encrypt the following Plaintext using Vigenere cipher: Plaintext: stocks market is falling Key : one. Is Vigenere cipher monoalphabetic or polyalphabetic? Why?
Why do you think DoS attackers use zombies to attack victims instead of sending attack packets directly to victims? Come up with two reasons.
Using CBC mode of operation what are the consequences of decrypting the cipher text if it has an error in the first bit of the first block C?
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