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1. Using the English alphabet (i.e., mod 26 arithmetic) let plaintext = {p1, p2,... , pn} and corresponding ciphertext = {c1, c2,... , cn}. Suppose the encryption function is ci = pi + 15 (mod 26). 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?
2. A 1,048,576-bit message is used to generate a 10-bit hash. One the average, how many other messages could be expected to generate the same hash value?
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?
Describe how a hacker might go about cracking a message encrypted with each type of algorithm. Suggest a specific application for each type of algorithm where the advantages clearly outweigh the disadvantages.
Consider your organization's security architecture. How much do you know about it? How much do other workers know? How easy is it to learn more?
ESSAYS a special requirement mentioned back in milestone 1, Jack millss wished the system to have "state-of-the-art-maybe some biometric device which can be used in office and at home easily and cheaply.
computer security incident, Trojan Defence, anti-forensics technique, chain of custody, FAT file system, SQLOracleHacks.txt, SQLOracleAttacks.txt, SQLInjection.html
Analyse security procedures
Explain in scholarly detail on whether you believe security measures currently in place give adequate security as well as privacy, or do you believe these issues being emphasized are at the expense of the other?
Generates the alternative message which has a hash value which collides with Bob's original hash value. Illustrate a message that Alice may have spoofed, and demonstrate that its hash value collides with Bob's original hash.
Generates an alternative message that has a hash value that collides with Bob's original hash value. Show a message that Alice may have spoofed, and demonstrate that its hash value collides with Bob's original hash."
Deliver a research paper and presentation based on your research - Future threats to network security and planning for those threats
The Internet evolution is and is very fast and the Internet exposes the connected computers to attacks and the subsequent losses are in rise.
Research current security trends, countermeasures, and threats. What will be the most threatening security issues firms have to deal with within the next five years?
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