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The following ciphertext is a monoalphabetic ciper:
PELCGBTENCUL VF GUR NEG BS FRPERG JEVGVAT VG VAIBYIRF GENAFSBEZVAT VASBEZNGVBA VAGB NCCNERAGYL HAVAGRYYVTVOYR TNEONTR FB GUNG HAJNAGRQ RLRF JVYY OR HANOYR GB PBZCERURAQ VG
Decrypt this message, and briefly describe your cryptanalys is methodology. In particular, list features of the ciphertext that hindered or helped your decryption process.
You are investigating a case involving an employee who is allegedly sending inappropriate photos via e-mail in attachments that have been compressed with a zip utility.
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?
Why is one-time password system considered more secure than the basic authentication system? Give at least two reasons.
Originally Linux/UNIX systems had one all-powerful user called root that managed systems. Discuss the risks of having a single root user and how more limited management abilities can be given to others users on Linux/UNIX systems.
What is the difference between message confidentiality and message integrity? Can you have confidentiality without integrity? Can you have integrity without confidentiality? Please be specific and justify your answer.
Discuss some of the problems NATs create for IPsec security. Solve problems by using IPv6? Why deployment of IPv6 has been slow to date. What is needed to accelerate its deployment
After a computer forensics investigation, you require to meet with your section or group of fellow investigators and critique the case in an effort to improve your work.
Assume you are in implementation phase of a assignment and your customer indicates they require a specific change to the project that changes the scope of the deliverables.
How are many chunks of code from many organizations really going to work together to provide a secure and reliable computing environment?
Who does content of e-mail rightfully belongs to sender or receiver? Are security threats overblown? Present the example to support response.
An ISP has received a block of addresses in which the prefix length (n = 24). The ISP needs to make 8 sub-nets (sub-blocks) of equal sizes from this block. What is the prefix of each sub-block?
What is the principle of adequate protection? Do you agree with the principle? What difficulties are associated with implementing it?
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