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For each of the following statements, determine whether or not the assertion is true and if it is, prove that it is. If it is not, prove that it is not.
a) DES operating on a general plaintext input first with key K1 and then with key K2 produces the same output as if K2 were first used and then K1.b) Starting with a general English plaintext P and two mono-alphabetic substitution schema, M1 and M2, the outcome of M2 applied to (M1 applied to P) is the same as the outcome of M1 applied to (M2 applied to P).c) Using two keys K1 and K2 and the Vigenere polyalphabetic method, the result of encrypting a general plaintext first with K1 and then encrypting the result with K2 is the same as first encrypting the plaintext with K2 and then the result with K1.
Storage Area Networks (SAN) and Network Attached Storage (NAS) each give high capacity file storage. For the following list, indicate whether the list item is more characteristic of a SAN or a NAS configuration.
Determine how much time, if any, these two employees are spending surfing the Web. Is it wrong to access these records? Do some research on workplace privacy laws to justify your answer.
Discuss two drawbacks of steganography Describe the operation of a Trojan Horse program. How can we protect our computer from such a program
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?
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?
Analyse security procedures
If this message is sent unencrypted and successfully received, determine its entropy? If this message is encrypted with DES using random 56-bit key, determine the encrypted message's entropy?
Which is more probably to be effective in protecting intellectual property in digital media like CDs and DVDs: tougher copyright laws or new technologies incorporating more sophisticated anti-copying measures?
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.
Users are familiar with some network services like HTTP (Hypertext Transport Protocol) - the Web; and SMTP. Tell us more about these services. How do they figure into organizational security? Elaborate with specifics.
What does privacy mean to you? Is privacy a right or a privilege? How should one's privacy be legally protected or secured, especially when using the Internet?
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.
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