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To ensure the security of the files used by the new Web site, files need to access controls that limit which users can view and execute them. To further your understanding of file permissions, describe in detail these 5 file listings, explain all items on each line, explain what they specify or mean, and give the chmod command to set files with these permissions: -rwxr-xr-- 1 instruct staff 270311 Aug 11 2009 install.sh -rw-r--r-- 1 instruct staff 348039 Aug 12 2008 User_Guide.txt -rw-r----- 1 instruct staff 635106 Aug 12 2009 Admin_Guide.txt drwxr-xr-x 4 instruct staff 144 Aug 12 2009 Documents -rwsr-sr-x 1 nobody nobody 169202 Aug 11 2009 httpd It is also a necessity to know and understand regular expressions, not only at the UNIX command line, but editors and some programs use them quite extensively. Explain the following Metacharacters/Regular Expressions: * ? ^ $ [0-9] [a-z] Give a regular expression to match the following: All files that end in txt Files that have a second character of a and end in sh Any file that starts with a number A blank line A traditional 10-digit U.S.-based phone number, in the following format: (407) 555-1212 Submit the explanations, commands, definitions, and expressions in a Word document.
Some attributes of a corporation's organizational culture are so obvious that even an independent observer can feel them. Provide an example of such an observation and describe what cultural phenomenon it defines.
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?
Denial of Service attack (DoS) and Distributed Denial of service (DDoS) attack, two-factor authentication system, password ageing, biometric devic, cryptographic attack made Double DES (2DES), Demilitarized Zone (DMZ), SSL protocols
What technology and cost-of-use issues are associated with a client-dominant local area network? Think about what happens as the network grows in size.
In symmetric encryption, why is it significant to exchange keys "out of band"? Write down the difference between "digital signature" and "digital certificate"?
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.
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.
Organization that severely lacks in appreciating the need for security or a company that depends on equipment that is outdated and services from contractors that are low quality? Why?
How should government justify telling private industry how to set up or improve their cybersecurity?
Dissect an email you have received. First, get the original, ASCII text of the email, including the headers, and the blank line separating the headers and the body of the email.
Below are ciphertext from Vigenere cipher. Determine plaintext and key. Give a clearly written description of steps you followed to decrypt each ciphertext.
What is your understanding of the difference between a stream cipher and a block cipher?
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